Edge sharpening material, preparation method of edge sharpening material and grinding tool comprising edge sharpening material

Abstract

The present invention relates to an edged material comprising about 60%-68% by weight of zirconia and hafnium oxide, based on the total weight of the edged material; about 30% to 38% by weight of silica; about 0.2% to 5% by weight of a transition metal oxide. The invention further relates to a grinding tool which comprises the edging material.

Description

Technical Field

[0001] The present invention relates to the field of inorganic materials, and particularly to an edge-opening material containing zirconia, hafnium oxide, and silicon dioxide, a preparation method thereof, and an abrasive tool containing the edge-opening material. Background Art

[0002] Abrasive products are commonly used for grinding and polishing. Different from the application scenarios of other abrasive products, edge-opening materials are more applied to the dressing, shaping, etc. of grinding wheels, grinding stones, etc. Edge-opening materials are one of many abrasive products.

[0003] In order to further obtain an edge-opening material and an abrasive tool with excellent grinding performance and edge-opening effect for different application objects and environments, further research and development are still needed to further improve the edge-opening effect and service life of the edge-opening material and the abrasive tool. Summary of the Invention

[0004] In one aspect, the present invention relates to an edge-opening material, which contains, based on the total weight of the edge-opening material, about 60% to 68% by weight of zirconia and hafnium oxide; about 30% to 38% by weight of silicon dioxide; about 0.2% to 5% by weight of transition metal oxide.

[0005] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material of the present invention further contains other oxides of about 5% by weight or less.

[0006] In one aspect, the present invention relates to an edge-opening material, which contains, based on the total weight of the edge-opening material, more than about 90% by weight of zirconia-based metal oxide composite, about 5% by weight or less of transition metal oxide, and optionally, about 5% by weight or less of other oxides.

[0007] In one embodiment, the zirconia-based metal oxide composite includes zirconium silicate, zirconia, hafnium oxide, silicon dioxide, or a combination thereof.

[0008] In one embodiment, the zirconia-based metal oxide composite includes zirconia, hafnium oxide, silicon dioxide, and a combination thereof.

[0009] In a specific embodiment, the zirconia-based metal oxide composite is zirconium silicate.

[0010] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at which the cumulative particle size distribution reaches 10% 10 is about 0.3 - 0.9 mm; the equivalent diameter D at which the cumulative particle size distribution reaches 50% 50 is about 0.6 - 1.5 mm; the equivalent diameter D at which the cumulative particle size distribution reaches 90% 90is about 0.9 - 2.5 mm; the equivalent particle size D at a cumulative particle size distribution of 98% 98 is about 1.6 - 6 mm.

[0011] In one embodiment, the area distribution of the edge-opening material is such that the area at a cumulative area distribution of 10% is about 0.05 - 0.9 mm 2 ; the area at a cumulative area distribution of 50% is about 0.2 - 2 mm 2 ; the area at a cumulative area distribution of 90% is about 0.6 - 5 mm 2 ; the area at a cumulative area distribution of 98% is about 2.0 - 30 mm 2 .

[0012] On the other hand, the present invention provides a method for preparing the edge-opening material of the present invention, which includes providing a precursor raw material of the edge-opening material; processing the precursor raw material to obtain the edge-opening material; wherein, the precursor raw material includes one or more of a zirconium source material, a silicon source material, a zirconium-silicon material, an additive, and an organic binder.

[0013] In yet another aspect, the present invention provides an abrasive tool, which includes the edge-opening material of the present invention. In a specific embodiment, the abrasive tool is an edge-opening tool. In a more specific embodiment, the abrasive tool is an edge-opening tool for a grindstone. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram showing the pore distribution of edge-opening material 1 and comparative edge-opening materials 1 and 2;

[0015] Figure 2 Showing the SEM spectrum a of edge-opening material 1;

[0016] Figure 3 Showing the treated SEM spectrum a of edge-opening material 1;

[0017] Figure 4 Showing the SEM spectrum b of edge-opening material 1;

[0018] Figure 5 Showing the treated SEM spectrum b of edge-opening material 1;

[0019] Figure 6 Showing the SEM spectrum c of edge-opening material 1;

[0020] Figure 7 Showing the treated SEM spectrum c of edge-opening material 1;

[0021] Figure 8 Schematic diagram showing the particle size distribution of edge-opening material 1;

[0022] Figure 9 Schematic diagram showing the aspect ratio of the edge-opening material 1

[0023] Figure 10 Schematic diagram showing the area distribution of the edge-opening material 1

[0024] Figure 11 SEM spectrum diagram showing the edge-opening material of the comparative edge-opening material 1

[0025] Figure 12 SEM spectrum diagram showing the treated edge-opening material of the comparative edge-opening material 1

[0026] Figure 13 Schematic diagram showing the particle size distribution of the edge-opening material of the comparative edge-opening material 1

[0027] Figure 14 Schematic diagram showing the aspect ratio of the edge-opening material of the comparative edge-opening material 1

[0028] Figure 15 Schematic diagram showing the area distribution of the comparative edge-opening material 1

[0029] Figure 16 SEM spectrum diagram showing the edge-opening material of the comparative edge-opening material 2

[0030] Figure 17 Schematic diagram showing the particle size distribution of the edge-opening material of the comparative edge-opening material 2

[0031] Figure 18 Schematic diagram showing the aspect ratio of the edge-opening material of the comparative edge-opening material 2

[0032] Figure 19 XRD spectrum diagram showing the edge-opening material 1

[0033] Figure 20 XRD spectrum diagram showing the comparative edge-opening material 1

[0034] Figure 21 XRD spectrum diagram showing the comparative edge-opening material 2

[0035] Figure 22 Schematic diagram showing the pore size distribution of the edge-opening material 1 Detailed implementation manners

[0036] The present invention will be further described in detail below. Such description is for illustrative purposes and does not limit the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Those skilled in the art can make various modifications and changes without departing from the spirit of the present invention.

[0037] General Definitions and Terms

[0038] All publications, patent applications, patents, and other references mentioned herein are incorporated herein by reference in their entirety, unless otherwise indicated.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the definitions provided herein shall control.

[0040] Unless otherwise noted, all percentages, parts, ratios, etc. are by weight.

[0041] When a quantity, concentration, or other value or parameter is given as a range, a preferred range, or a preferred upper limit and lower limit, or as a specific value, it is to be understood as specifically disclosing all ranges formed from any pair of upper range or preferred values and any lower range or preferred values, whether or not the ranges are separately disclosed. Unless otherwise stated, when a numerical range is recited herein, the range is intended to include its endpoints, as well as all integers and fractions within that range. The scope of the present invention is not limited to the specific numerical values recited when defining the range. For example, "1 - 20" encompasses 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, and any sub - ranges formed by any two of these values. For example, 2 - 6, 3 - 5, 2 - 10, 3 - 15, 4 - 20, 5 - 19, etc. For example, "3.0 - 5.0" encompasses 3.0, 3.2, 3.5, 3.8, 4.0, 4.2, 4.5, 4.7, 4.9, 5.0, and any sub - ranges formed by any two of these values. For example, 3.0 - 3.5, 3.0 - 4.0, 3.8 - 4.5, 4.0 - 5.0, etc.

[0042] As used herein, the terms "about" or "approximately" when used in conjunction with a numerical variable generally refer to the value of the variable and all values within experimental error (e.g., within a 95% confidence interval for an average value) or within ±10% of the specified value, or within a broader range.

[0043] The terms "comprising", "including", "having", "containing", or "involving" and other variant forms thereof used herein are inclusive or open - ended and do not exclude other unrecited elements or method steps. Those skilled in the art should understand that the above - mentioned terms such as "comprising" cover the meaning of "consisting of". The expression "consisting of" excludes any unstated element, step, or ingredient. The expression "consisting essentially of" means that the scope is limited to the specified elements, steps, or ingredients, plus any elements, steps, or ingredients that optionally exist and do not substantially affect the basic and novel features of the claimed subject matter. It should be understood that the expression "including" covers the expressions "consisting essentially of" and "consisting of".

[0044] The term "selected from..." means one or more elements selected independently from the group listed hereinafter, and may include combinations of two or more elements.

[0045] As used herein, the terms "optional", "optionally", "optional" or "optionally" mean that the subsequent described event or situation may or may not occur, and the description includes the occurrence and non-occurrence of the described event or situation.

[0046] As used herein, the term "one or more" or "at least one" means one, two, three, four, five, six, seven, eight, nine or more.

[0047] In addition, if the number of components or ingredients of the present invention is not specified beforehand, it means that there is no limit to the number of occurrences (or existence) of the components or ingredients. Therefore, it should be construed as including one or at least one, and the singular form of the component or ingredient also includes the plural, unless the value clearly indicates the singular.

[0048] Unless otherwise specified, the terms "its combination" and "its mixture" refer to a multi-component mixture of the respective elements, such as a two-component, three-component, four-component, and up to the maximum possible multi-component mixture.

[0049] As used herein, the term "zirconium source material" refers to a material containing zirconium element. The zirconium element can be in different forms, including but not limited to zirconium oxides, zirconium hydroxides, zirconium chlorides, etc. These derivatives of zirconium can be used as zirconium sources for preparing the edge-opening material of the present invention. After high-temperature sintering, the zirconium element in the zirconium source material can form its corresponding oxide and be dispersed in the edge-opening material. In the present invention, the zirconium source material can include components in particulate form, and there can be particles of different particle sizes in the zirconium source material, so there can also be a particle size distribution in the zirconium source material.

[0050] As used herein, the term "silicon source material" refers to a material containing silicon element. The silicon element can be in different forms, including but not limited to silicon oxides, silicates, etc. These derivatives of silicon can be used as silicon sources for preparing the edge-opening material of the present invention. After high-temperature sintering, the silicon element in the silicon source material can form its corresponding oxide and be dispersed in the edge-opening material. In the present invention, the silicon source material can include components in particulate form, and there can be particles of different particle sizes in the silicon source material, so there can also be a particle size distribution in the silicon source material.

[0051] The term "zirconium-silicon material" as used herein refers to a material containing both zirconium and silicon elements. The zirconium element can be in different forms, including but not limited to zirconium oxides, zirconium hydroxides, zirconium chlorides, etc. Additionally, the silicon element can be in different forms, including but not limited to silicon oxides, silicates, etc. These derivatives of zirconium and silicon can be used as zirconium sources and silicon sources respectively for preparing the edge-opening material of the present invention. After high-temperature sintering, the zirconium and silicon elements in the zirconium-silicon material can form their corresponding oxides and be dispersed in the edge-opening material. In the present invention, the zirconium-silicon material can include components in particulate form, and there can be particles of different particle sizes in the zirconium-silicon material, so there can also be grading in the zirconium-silicon material.

[0052] The term "zirconia-based metal oxide composite" as used herein refers to a metal oxide composite containing zirconia. In a specific embodiment, the zirconia-based metal oxide composite can be zirconium silicate.

[0053] The term "metal oxide composite" as used herein refers to an aggregate formed by chemically bonding two or more oxides (where at least one oxide is a metal oxide), which is different from a simple substance or a mixture.

[0054] The term "grading" as used herein, also known as particle size grading, refers to the quantity of each particle size in a bulk material composed of different particle sizes. It is often expressed as a percentage of the total amount. In this article, grading is used to represent the particle size distribution of the components in the raw materials of the edge-opening material.

[0055] The term "cumulative particle size distribution" as used herein refers to the relationship of the percentage of the number, volume, mass, etc. of particles smaller than a certain specified particle size in a unit material to the total number of particles, total volume, or total mass of the particles with respect to different particle sizes.

[0056] The term "cumulative area distribution" as used herein refers to the relationship of the percentage of the number, volume, mass, etc. of particles smaller than a certain specified particle area in a unit material to the total number of particles, total volume, or total mass of the particles with respect to different particle sizes.

[0057] The term "aspect ratio" as used herein refers to the aspect ratio of the crystal grains, that is, the ratio of the length to the width of the crystal grains. The aspect ratio can reflect the shape of the crystal grains.

[0058] The term "pore size distribution" as used herein refers to the percentage calculated according to the corresponding cumulative volume of each pore size existing in the material.

[0059] The term "apparent porosity" as used herein is the percentage of the pore volume in a massive material to the total volume of the material in its natural state. The porosity or density of the material directly reflects the degree of compactness of the material. A high porosity of the material indicates a low degree of compactness.

[0060] As used herein, the term "bulk density" refers to the mass per unit volume of a material in a state that includes real volume, open pores, and closed pores. Generally, the higher the bulk density of a material, the higher the degree of densification of the material.

[0061] As used herein, the term "modulus of rupture" is abbreviated as MOR (modulus of rupture), and refers to the ultimate strength of a material measured in a bending test or a torsion test of the material. In a bending test, the bending modulus of rupture refers to the maximum fiber stress at failure. In a torsion test, the torsional modulus of rupture refers to the maximum shear stress at the outermost edge of a circular rod at failure. Therefore, the modulus of rupture generally also refers to the flexural strength and torsional strength of a material.

[0062] As used herein, the term "abrasive tool" refers to a tool used for grinding, lapping, and polishing. Examples of abrasive tools include, but are not limited to, edge-opening tools, grinding stones.

[0063] Edge-opening Material

[0064] In one aspect, the present invention relates to an edge-opening material, which comprises, based on the total weight of the edge-opening material, about 60 wt% - 68 wt% of zirconia and hafnium oxide; about 30 wt% - 38 wt% of silica; about 0.2 wt% - 5 wt% of transition metal oxide.

[0065] Zirconia

[0066] The chemical formula of zirconia is ZrO 2 , which is the main oxide of zirconium.

[0067] It should be noted that in nature, hafnium often coexists with zirconium. Among them, hafnium and zirconium are located in the fourth subgroup of the periodic table of elements, with similar properties. Due to their very close atomic radii, chemical separation is very difficult. Therefore, hafnium elements are usually accompanied in materials containing zirconium elements. Therefore, the zirconia, zirconium silicate, and zirconia-based metal oxide composites of the present invention usually accompany the corresponding hafnium oxides, for example, hafnium oxide.

[0068] In a specific embodiment, the edge-opening material of the present invention comprises zirconia.

[0069] In a preferred embodiment, the edge-opening material of the present invention comprises zirconia, and optionally, the edge-opening material of the present invention further comprises hafnium oxide.

[0070] In a specific embodiment, the edge-opening material of the present invention comprises zirconia and silica, and optionally, the edge-opening material of the present invention further comprises hafnium oxide.

[0071] Silica

[0072] The chemical formula of silicon dioxide is SiO 2 .

[0073] In the edge-opening material of the present invention, suitable silicon oxides (such as silicon dioxide) are beneficial to improving the edge-opening performance and grinding performance of the edge-opening material. Specifically, suitable silicon oxides (such as silicon dioxide) are beneficial to endowing the edge-opening material of the present invention with appropriate mechanical strength. If the mechanical strength of the edge-opening material is too low, it will lead to excessive material loss during the edge-opening process, or the abrasives in the edge-opening material cannot be fully exposed, resulting in poor edge-opening performance. If the mechanical strength of the edge-opening material is too high, it will cause the loss of abrasives during the edge-opening process, which will also lead to poor edge-opening performance. In addition, suitable silicon oxides (such as silicon dioxide) are also beneficial to improving the grinding performance of the edge-opening material, reducing the loss of the edge-opening material during the grinding process, and prolonging the service life of the edge-opening material.

[0074] In a specific embodiment, the edge-opening material of the present invention contains silicon dioxide.

[0075] In a specific embodiment, the edge-opening material of the present invention contains zirconium oxide and silicon dioxide, and optionally, the edge-opening material of the present invention further contains hafnium oxide.

[0076] In an embodiment, the zirconium-based metal oxide composite of the present invention contains silicon oxide. In a specific embodiment, the silicon oxide is silicon dioxide.

[0077] In a specific embodiment, the edge-opening material contains a composite oxide of zirconium oxide, hafnium oxide and silicon dioxide.

[0078] Transition metal oxide

[0079] Transition metal oxide refers to a material containing a transition metal and oxygen.

[0080] In an embodiment, the transition metal oxide of the present invention is used as a sintering aid for the edge-opening material to improve the sintering performance of the edge-opening material, thereby facilitating the obtaining of a qualified edge-opening material.

[0081] In an embodiment, the transition metal oxide includes oxides of titanium, scandium, vanadium, chromium, manganese, yttrium, niobium, molybdenum or a combination thereof. In a preferred embodiment, the transition metal oxide is titanium oxide. Suitable transition metal oxides are beneficial to endowing the edge-opening material of the present invention with improved edge-opening performance, while enabling the edge-opening material to have excellent grinding performance and prolonging the service life of the edge-opening material.

[0082] Suitable transition metal oxides are beneficial to improving the edge-opening performance of the edge-opening material. Specifically, suitable transition metal oxides are beneficial to endowing the edge-opening material of the present invention with appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, suitable transition metal oxides are beneficial to improving the grinding performance of the edge-opening material and extending the service life of the edge-opening material.

[0083] Other oxides

[0084] Optionally, in one embodiment, the edge-opening material of the present invention further comprises other oxides. In one embodiment, the edge-opening material of the present invention further comprises other oxides. In a specific embodiment, the other oxides are derived from the starting materials.

[0085] In another embodiment, in the edge-opening material of the present invention, zirconia (accompanied by hafnium oxide) can form a complex with other metal oxides used as edge-opening materials to serve as the grinding component of the edge-opening material of the present invention.

[0086] In one embodiment, the edge-opening material of the present invention includes other oxides selected from alumina, calcium oxide, phosphorus oxide, iron oxide, magnesium oxide, potassium oxide, sodium oxide, and combinations thereof. In another specific embodiment, the other oxides are selected from calcium oxide, phosphorus oxide, alumina, potassium oxide, sodium oxide, and combinations thereof. In a particularly specific embodiment, the other oxides include calcium oxide, aluminum sesquioxide, phosphorus pentoxide, or combinations thereof.

[0087] In the edge-opening material of the present invention, suitable other oxides are beneficial to improving the grinding performance and edge-opening performance of the edge-opening material. Specifically, suitable other oxides are beneficial to endowing the edge-opening material of the present invention with appropriate mechanical strength, thereby improving the edge-opening performance of the material.

[0088] In addition, suitable other oxides are also beneficial to improving the grinding performance of the edge-opening material. Furthermore, the edge-opening material of the present invention contains suitable other metal oxides, which can also avoid the introduction of impurities into the edge-opening material, thereby facilitating the secondary recovery and utilization of the mud produced during the edge-opening process of the edge-opening material of the present invention. Therefore, the edge-opening material of the present invention is a sustainable material.

[0089] In one aspect, the present invention relates to an edge-opening material comprising, based on the total weight of the edge-opening material, more than about 90% by weight of a zirconia-based metal oxide complex, less than about 5% by weight of a transition metal oxide, and optionally, less than about 5% by weight of other oxides.

[0090] Zirconia-based metal oxide complex

[0091] In the present invention, the zirconia-based metal oxide composite may refer to an oxide composite containing zirconia, hafnium oxide, and silicon oxide. Optionally, the zirconia-based metal oxide composite of the present invention further includes a composite metal oxide of other metal oxides.

[0092] The edge-opening material of the present invention contains a zirconia-based metal oxide composite.

[0093] In one embodiment, the zirconia-based metal oxide composite includes zirconium silicate, zirconia, silicon dioxide, hafnium oxide, or a combination thereof.

[0094] In a specific embodiment, the zirconia-based metal oxide composite includes zirconia, silicon dioxide, hafnium oxide, and combinations thereof.

[0095] In a specific embodiment, the zirconia-based metal oxide composite is zirconium silicate.

[0096] In another specific embodiment, the zirconia-based metal oxide composite may be other zirconia-based metal oxide composites other than zirconium silicate, and the other zirconia-based metal oxide composites may include zirconia, silicon dioxide, hafnium oxide, and combinations thereof.

[0097] In a specific embodiment, the edge-opening material contains a combination of zirconium silicate and other zirconia-based metal oxide composites.

[0098] In a specific embodiment, the edge-opening material contains a combination of zirconium silicate and other zirconia-based metal oxide composites, and optionally, the edge-opening material further contains hafnium oxide, silicon dioxide, or a combination thereof.

[0099] A suitable type of zirconia-based metal oxide composite helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance, and is also beneficial to improving the lifespan of the edge-opening material. Specifically, a suitable zirconia-based metal oxide composite is beneficial to making the edge-opening material of the present invention have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable zirconia-based metal oxide composite is also beneficial to improving the grinding performance of the edge-opening material and improving the lifespan of the edge-opening material.

[0100] Zirconia and zirconia-based metal oxide composites

[0101] In a specific embodiment, the edge-opening material of the present invention includes zirconia and a zirconia-based metal oxide composite.

[0102] In another specific embodiment, the edge-opening material of the present invention includes zirconia and zirconium silicate.

[0103] In a preferred embodiment, the edge-opening material of the invention comprises zirconia and zirconia-based metal oxide composites, and optionally, the edge-opening material further comprises hafnium oxide, silicon dioxide or a combination thereof.

[0104] In another preferred embodiment, the edge-opening material of the invention comprises zirconia and zirconium silicate, and optionally, the edge-opening material further comprises hafnium oxide, silicon dioxide or a combination thereof.

[0105] Suitable types of zirconia and / or zirconia-based metal oxide composites help the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance, and also contribute to improving the lifespan of the edge-opening material. Specifically, suitable zirconia and / or zirconia-based metal oxide composites are beneficial for the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the material. Additionally, suitable zirconia and / or zirconia-based metal oxide composites are also beneficial for improving the grinding performance of the edge-opening material and improving the lifespan of the edge-opening material.

[0106] Zirconium Silicate

[0107] Zirconium silicate is also known as zirconium orthosilicate, and its chemical formula is ZrSiO 4 , which is a silicate of zirconium. It is usually composed of 8-coordinate Zr 4 4- centers connected to the tetrahedral orthosilicate SiO 4+ sites. The oxygen atoms are all triply bridged, each having the environment OZr 2 Si.

[0108] In another embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide composite.

[0109] In a specific embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide composite, and the zirconia-based metal oxide composite is zirconium silicate.

[0110] In the form of zirconia and silicon dioxide

[0111] In a specific embodiment, the edge-opening material of the present invention comprises particles. In a preferred embodiment, the particles comprise zirconia and hafnium oxide, silicon oxide.

[0112] In the form of zirconia-based metal oxide composites

[0113] In a specific embodiment, the edge-opening material of the present invention comprises particles. In a preferred embodiment, the particles comprise a zirconia-based metal oxide composite, which may exist in the form of zirconium-containing particles.

[0114] Specifically, the "zirconium-containing particles" described in this article refer to particles containing zirconium elements dispersed in the edge-opening material of the present invention, that is, particles containing zirconium oxide-based metal oxide composites. The zirconium-containing particles of the present invention can endow the abrasive tool with good hardness and polishing ability, and can also improve the grinding performance and edge-opening performance of the edge-opening material.

[0115] Content of zirconia and hafnium oxide

[0116] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 60 wt% - 68 wt% of zirconia and hafnium oxide. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 63 wt% - 66 wt% of zirconia and hafnium oxide. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 60 wt%, preferably more than about 63 wt% of zirconia and hafnium oxide. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains less than about 68 wt%, preferably less than about 66 wt% of zirconia and hafnium oxide. For example, about 60 wt%, about 61 wt%, about 62 wt%, about 63 wt%, about 64 wt%, about 65 wt%, about 66 wt%, about 67 wt%, about 68 wt%.

[0117] Unless otherwise specified, in the present invention, the content of zirconia and hafnium oxide in the edge-opening material can be obtained by the method of X-ray fluorescence spectrometry (XRF analysis). The specific analysis method can refer to the example part of the present invention.

[0118] A suitable content of zirconia and hafnium oxide can enable the edge-opening material of the present invention to have a suitable MOR value, which is conducive to obtaining improved edge-opening performance of the edge-opening material of the present invention, while enabling the edge-opening material to have excellent grinding performance, reducing the loss of the edge-opening material during the grinding process, and improving the service life of the edge-opening material. Too high or too low content of zirconia and hafnium oxide is not conducive to enabling the edge-opening material of the present invention to have suitable mechanical strength, nor is it conducive to enabling the edge-opening material of the present invention to have suitable edge-opening performance and grinding performance.

[0119] Weight ratio of zirconia and hafnium oxide

[0120] In one embodiment, the edge-opening material of the present invention includes zirconia and hafnium oxide.

[0121] In one embodiment, in the edge-opening material of the present invention, the weight ratio of zirconia to hafnium oxide is about 30:1 to about 70:1. In a preferred embodiment, in the edge-opening material of the present invention, the weight ratio of zirconia to hafnium oxide is about 40:1 to about 60:1. In a more preferred embodiment, in the edge-opening material of the present invention, the weight ratio of zirconia to hafnium oxide is about 45:1 to about 55:1. In one embodiment, in the edge-opening material of the present invention, the weight ratio of zirconia to hafnium oxide is more than about 30:1, preferably more than about 40:1, and more preferably more than about 45:1. In one embodiment, in the edge-opening material of the present invention, the weight ratio of zirconia to hafnium oxide is less than about 70:1, preferably less than about 60:1, and more preferably less than about 55:1. For example, about 30:1, about 35:1, about 40:1, about 41:1, about 42:1, about 43:1, about 44:1, about 45:1, about 46:1, about 47:1, about 48:1, about 49:1, about 50:1, about 51:1, about 52:1, about 53:1, about 54:1, about 55:1, about 60:1, about 65:1, about 70:1.

[0122] Unless otherwise specified, in the present invention, the weight ratio of zirconia to hafnium oxide can be obtained based on the contents of zirconia and hafnium oxide obtained by XRF analysis. The specific analysis method can refer to the example part of the present invention.

[0123] A suitable weight ratio of zirconia to hafnium oxide helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance, and is also beneficial to improving the lifespan of the edge-opening material. Specifically, a suitable weight ratio of zirconia to hafnium oxide is conducive to making the edge-opening material of the present invention have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable weight ratio of zirconia to hafnium oxide is also beneficial to improving the grinding performance of the edge-opening material and improving the lifespan of the edge-opening material.

[0124] Content of silicon dioxide

[0125] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 30 wt% - 38 wt% of silica. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 31 wt% - 34 wt% of silica. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 30 wt%, preferably more than about 31 wt% of silica. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains less than about 38 wt%, preferably less than about 34 wt% of silica. For example, about 30 wt%, about 31 wt%, about 32 wt%, about 33 wt%, about 34 wt%, about 35 wt%, about 36 wt%, about 37 wt%, about 38 wt%.

[0126] Unless otherwise specified, in the present invention, the content of silica in the edge-opening material can be obtained by the method of XRF analysis. The specific analysis method can refer to the example part of the present invention.

[0127] A suitable silica content helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance, and is also beneficial to improving the life of the edge-opening material. Specifically, a suitable silica content is beneficial to endowing the edge-opening material of the present invention with appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable silica content is also beneficial to improving the grinding performance of the edge-opening material and improving the life of the edge-opening material.

[0128] Content of transition metal oxide

[0129] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 0.2 wt% - 5 wt% of a transition metal oxide. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 0.3 wt% - 2 wt% of a transition metal oxide. In a more preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 0.5 wt% - 1.5 wt% of a transition metal oxide. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 0.2 wt%, preferably more than about 0.3 wt%, more preferably more than about 0.5 wt% of a transition metal oxide. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains about 5 wt% or less, preferably about 2 wt% or less, more preferably about 1.5 wt% or less of a transition metal oxide. For example, about 0.2 wt%, about 0.5 wt%, about 0.6 wt%, about 0.7 wt%, about 0.8 wt%, about 0.9 wt%, about 1.0 wt%, about 1.1 wt%, about 1.2 wt%, about 1.3 wt%, about 1.4 wt%, about 1.5 wt%, about 1.6 wt%, about 1.8 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%.

[0130] Unless otherwise specified, in the present invention, the content of the transition metal oxide in the edge-opening material can be obtained by the method of XRF analysis. The specific analysis method can refer to the example part of the present invention.

[0131] A suitable content of the transition metal oxide is beneficial to endowing the edge-opening material of the present invention with improved grinding performance and edge-opening performance, and improving the high-temperature sintering performance of the edge-opening material, thereby facilitating the obtaining of a qualified edge-opening material through high-temperature sintering. Specifically, a suitable content of the transition metal oxide is beneficial to endowing the edge-opening material of the present invention with appropriate mechanical strength, thereby improving the edge-opening performance of the material. An excessively low content of the transition metal oxide is not conducive to improving the sintering performance of the edge-opening material, and thus is not conducive to obtaining a qualified edge-opening material through sintering. An excessively high or low content of the transition metal oxide will affect the grinding performance of the edge-opening material, and thus affect the service life of the edge-opening material.

[0132] Content of other oxides

[0133] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material of the present invention optionally contains about 5 wt% or less of other oxides. In one embodiment, based on the total weight of the edge-opening material, the edge-opening material of the present invention further contains about 5 wt% or less of other oxides.

[0134] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains no more than about 5 wt% of other oxides. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains no more than about 3 wt% of other oxides. In a more preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains no more than about 1.5 wt% of other oxides. For example, about 0.2 wt%, 0.3 wt%, 0.4 wt%, about 0.5 wt%, about 0.6 wt%, about 0.7 wt%, about 0.8 wt%, about 0.9 wt%, about 1.0 wt%, about 1.1 wt%, about 1.2 wt%, about 1.3 wt%, about 1.4 wt%, about 1.5 wt%, about 1.6 wt%, 1.7 wt%, about 1.8 wt%, 1.9 wt%, about 2 wt%, about 3 wt%, about 4 wt%, about 5 wt%.

[0135] Unless otherwise specified, in the present invention, the content of other oxides in the edge-opening material can be obtained by the method of XRF analysis. The specific analysis method can be referred to the example part of the present invention.

[0136] Content of zirconia-based metal oxide composite

[0137] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material of the present invention contains more than about 90 wt% of zirconia-based metal oxide composite.

[0138] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 90 wt% of zirconia-based metal oxide composite. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 93 wt% of zirconia-based metal oxide composite. In a more preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 94 wt% of zirconia-based metal oxide composite. For example, about 90 wt%, about 91 wt%, about 92 wt%, about 93 wt%, about 94 wt%, about 95 wt%, about 96 wt%, about 97 wt%, about 98 wt%, about 99 wt%, about 99.5 wt%.

[0139] Unless otherwise specified, in the present invention, the content of zirconia-based metal oxide composite in the edge-opening material can be obtained by the method of XRD analysis. The specific analysis method can be referred to the example part of the present invention.

[0140] A suitable content of zirconia-based metal oxide composite is beneficial for the edge-opening material of the present invention to obtain improved edge-opening performance and grinding performance, while endowing the edge-opening material with excellent service life. Specifically, a suitable content of zirconia-based metal oxide composite is beneficial for the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable content of zirconia-based metal oxide composite is also beneficial for improving the grinding performance of the edge-opening material and improving the service life of the edge-opening material.

[0141] Content of zirconium silicate

[0142] In one embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 90% by weight of zirconium silicate. In a preferred embodiment, based on the total weight of the edge-opening material, the edge-opening material contains more than about 93% by weight of zirconium silicate. In a more preferred embodiment, the edge-opening material contains more than about 94% by weight of zirconium silicate. For example, about 90% by weight, about 91% by weight, about 92% by weight, about 93% by weight, about 94% by weight, about 95% by weight, about 96% by weight, about 97% by weight, about 98% by weight, about 99% by weight, about 99.5% by weight.

[0143] Unless otherwise specified, in the present invention, the content of zirconium silicate in the edge-opening material can be obtained by XRD analysis method. The specific analysis method can refer to the embodiment part of the present invention.

[0144] A suitable content of zirconium silicate is beneficial for the edge-opening material of the present invention to obtain improved edge-opening performance and grinding performance, while endowing the edge-opening material with excellent service life. Specifically, a suitable ratio of zirconium silicate content is beneficial for the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable content of zirconium silicate is also beneficial for improving the grinding performance of the edge-opening material and improving the service life of the edge-opening material.

[0145] Aluminum oxide and its content

[0146] In one embodiment, the edge-opening material of the present invention contains aluminum oxide. In a specific embodiment, the aluminum oxide is aluminum trioxide.

[0147] In one embodiment, based on the total weight of the edge-opening material, the content of aluminum oxide is about 1% by weight or less. In a specific embodiment, the edge-opening material of the present invention contains almost no aluminum oxide.

[0148] Unless otherwise specified, in the present invention, the content of aluminum oxide in the edge-opening material can be obtained by XRF analysis method. The specific analysis method can refer to the embodiment part of the present invention.

[0149] In the edge-opening material of the present invention, the presence of alumina will affect the properties of the edge-opening material and the corresponding grinding tools. Among them, if the edge-opening material contains a high content of impurities (such as alumina), when using this edge-opening material to edge-open the grinding block, the above-mentioned impurities may be introduced into the slurry generated during the edge-opening process, resulting in the contamination of the generated slurry, and thus the slurry cannot be recycled and reused. To reduce the impact of these non-recyclable slurries on the production process, some additional processes may be introduced, resulting in an increase in production costs.

[0150] Therefore, in the edge-opening material of the present invention, an appropriate alumina content is beneficial to the preparation of the edge-opening material, and the edge-opening material of the present invention can be successfully prepared and obtained. At the same time, the obtained edge-opening material also has appropriate edge-opening performance and grinding performance, enabling the edge-opening material to have an improved service life, which is beneficial to using the edge-opening material of the present invention for the preparation of corresponding grinding tools, and further obtaining grinding tools with excellent edge-opening performance, grinding performance and grinding life.

[0151] Characteristics of Edge-opening Material

[0152] Particle size distribution of the edge-opening material

[0153] In one embodiment, the edge-opening material comprises particles. In one embodiment, the particles comprise zirconia and hafnium oxide, silica and transition metal oxides. In one embodiment, the particles comprise a zirconia-based metal oxide composite. In one embodiment, in the edge-opening material of the present invention, the particles have a particle size distribution.

[0154] Unless otherwise specified, in the present invention, the particle size distribution of the edge-opening material can be obtained according to the test results of scanning electron microscopy (SEM). Specifically, the edge-opening material of the present invention can be scanned by electron microscopy to obtain its SEM spectrum, and the SEM spectrum can be subjected to image analysis to obtain the particle size distribution of the edge-opening material. The specific analysis method of the SEM spectrum can be seen in the example part.

[0155] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D of the cumulative particle size distribution reaching 10% 10 is about 0.3 - 0.9 mm. In a preferred embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D of the cumulative particle size distribution reaching 10% 10 is about 0.5 - 0.7 mm.

[0156] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D of the cumulative particle size distribution reaching 10% 10 is about 0.3 mm or more, preferably about 0.5 mm or more. In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D of the cumulative particle size distribution reaching 10%10 is about 0.9 mm or less, preferably about 0.7 mm or less. For example, about 0.5 mm, about 0.6 mm, about 0.66 mm, about 0.7 mm, about 0.8 mm, about 0.9 mm.

[0157] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 0.6 - 1.5 mm. In a preferred embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 1 - 1.3 mm.

[0158] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 0.6 mm or more, preferably about 1 mm or more. In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 1.5 mm or less, preferably about 1.3 mm or less. For example, about 0.6 mm, about 0.7 mm, about 0.8 mm, about 0.9 mm, about 1.0 mm, about 1.1 mm, about 1.13 mm, about 1.2 mm, about 1.3 mm, about 1.4 mm, about 1.5 mm.

[0159] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 0.9 - 2.5 mm. In a preferred embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 1.5 - 2 mm.

[0160] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 0.9 mm or more, preferably about 1.5 mm or more. In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 2.5 mm or less, preferably about 2 mm or less. For example, about 0.9 mm, about 1.0 mm, about 1.1 mm, about 1.2 mm, about 1.3 mm, about 1.4 mm, about 1.5 mm, about 1.6 mm, about 1.7 mm, about 1.8 mm, about 1.9 mm, about 2.0 mm, about 2.1 mm, about 2.2 mm, about 2.3 mm, about 2.4 mm, about 2.5 mm.

[0161] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent particle size D at which the cumulative particle size distribution reaches 98% 98is about 1.6 - 6 mm. In a preferred embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at a cumulative particle size distribution of 98% 98 is about 3 - 5 mm.

[0162] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at a cumulative particle size distribution of 98% 98 is above about 1.6 mm, preferably above about 3 mm. In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at a cumulative particle size distribution of 98% 98 is below about 6 mm, preferably below about 5 mm. For example, about 1.6 mm, about 1.7 mm, about 1.8 mm, about 1.9 mm, about 2.0 mm, about 2.1 mm, about 2.2 mm, about 2.3 mm, about 2.4 mm, about 2.5 mm, about 2.6 mm, about 2.7 mm, about 2.8 mm, about 2.9 mm, about 3.0 mm, about 3.1 mm, about 3.2 mm, about 3.3 mm, about 3.4 mm, about 3.5 mm, about 4 mm, about 4.5 mm, about 5 mm, about 6 mm.

[0163] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at a cumulative particle size distribution of 10% 10 is 0.3 mm or more; the equivalent diameter D at a cumulative particle size distribution of 50% 50 is 0.6 mm or more; the equivalent diameter D at a cumulative particle size distribution of 90% 90 is 0.9 mm or more; the equivalent diameter D at a cumulative particle size distribution of 98% 98 is 1.6 mm or more.

[0164] In one embodiment, the particle size distribution of the edge-opening material is such that the equivalent diameter D at a cumulative particle size distribution of 10% 10 is about 0.9 mm or less; the equivalent diameter D at a cumulative particle size distribution of 50% 50 is about 1.5 mm or less; the equivalent diameter D at a cumulative particle size distribution of 90% 90 is about 2.5 mm or less; the equivalent diameter D at a cumulative particle size distribution of 98% 98 is 6 mm or less.

[0165] A suitable particle size distribution helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance. Additionally, when the edge-opening material of the present invention has a suitable particle size distribution, the introduction of impurities in the edge-opening material can be avoided, which is conducive to the secondary recovery and utilization of the sludge generated during the edge-opening process of the edge-opening material of the present invention. Therefore, the edge-opening material of the present invention is a sustainable material. Additionally, a suitable particle size distribution is beneficial for the edge-opening material of the present invention to have suitable mechanical strength, thereby improving the edge-opening performance of the material. Furthermore, a suitable particle size distribution is also beneficial for improving the grinding performance of the edge-opening material and extending the service life of the edge-opening material.

[0166] Area distribution of the edge-opening material

[0167] In one embodiment, the edge-opening material comprises particles. In one embodiment, the particles comprise zirconia and hafnium oxide, silica, and transition metal oxides. In one embodiment, the particles comprise a zirconia-based metal oxide composite. In one embodiment, in the edge-opening material of the present invention, the particles have an area distribution.

[0168] Unless otherwise specified, in the present invention, the area distribution of the edge-opening material can be obtained according to the test results of scanning electron microscopy (SEM). Specifically, the edge-opening material of the present invention can be scanned by scanning electron microscopy to obtain its SEM spectrum, and the SEM spectrum can be subjected to image analysis to obtain the area distribution of the edge-opening material. The specific analysis method of the SEM spectrum can be referred to in the Examples section.

[0169] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 10% is about 0.05 - 0.9 mm 2 . In a preferred embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 10% is about 0.3 - 0.7 mm 2 .

[0170] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 10% is about 0.05 mm 2 or more, preferably about 0.3 mm 2 or more. In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 10% is about 0.9 mm 2 or less, preferably about 0.7 mm 2 or less. For example, about 0.05 mm 2 , about 0.1 mm 2 , about 0.2 mm 2 , about 0.3 mm 2 , about 0.33 mm 2 , about 0.34 mm 2, approximately 0.4 mm 2 , approximately 0.5 mm 2 , approximately 0.6 mm 2 , approximately 0.7 mm 2 , approximately 0.9 mm 2 .

[0171] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 50% is approximately 0.2 - 2 mm 2 . In a preferred embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 50% is approximately 0.8 - 1.5 mm 2 .

[0172] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 50% is approximately 0.2 mm 2 or more, preferably approximately 0.8 mm 2 or more. In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 50% is approximately 2 mm 2 or less, preferably 1.5 mm 2 or less. For example, approximately 0.2 mm 2 , approximately 0.4 mm 2 , approximately 0.6 mm 2 , approximately 0.8 mm 2 , approximately 0.9 mm 2 , approximately 1.0 mm 2 , approximately 1.1 mm 2 , approximately 1.2 mm 2 , approximately 1.5 mm 2 , approximately 1.8 mm 2 , approximately 2 mm 2 .

[0173] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 90% is approximately 0.6 - 5 mm 2 . In a preferred embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 90% is approximately 2.5 - 3.5 mm 2 .

[0174] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 90% is approximately 0.6 mm 2 or more, preferably 2.5 mm 2 or more. In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 90% is approximately 5 mm 2 or less, preferably approximately 3.5 mm 2 or less. For example, approximately 0.6 mm 2 , approximately 0.8 mm2 、About 1 mm 2 、About 1.5 mm 2 、About 2.0 mm 2 、About 2.2 mm 2 、About 2.3 mm 2 、About 2.4 mm 2 、About 2.5 mm 2 、About 2.7 mm 2 、About 2.9 mm 2 、About 3.0 mm 2 、About 3.2 mm 2 、About 3.5 mm 2 、About 4 mm 2 、About 5 mm 2 。

[0175] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 98% is about 2.0 - 30 mm 2 。In a preferred embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 98% is about 6.0 - 20 mm 2 。

[0176] In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 98% is about 2.0 mm 2 or more, preferably about 6 mm 2 or more. In one embodiment, the area distribution of the edge-opening material is such that the area with a cumulative area distribution of 98% is about 30 mm 2 or less, preferably about 20 mm 2 or less. For example, about 2.0 mm 2 、about 3.0 mm 2 、about 4.0 mm 2 、about 5.0 mm 2 、about 6.0 mm 2 、about 7.0 mm 2 、about 8.0 mm 2 、about 9.0 mm 2 、about 10 mm 2 、about 15 mm 2 、about 20 mm 2 、about 30 mm 2 。

[0177] A suitable area distribution helps the edge-opening material of the present invention obtain improved grinding performance and edge-opening performance. Additionally, when the edge-opening material of the present invention has a suitable area distribution, the content of impurities in the material can be effectively reduced, facilitating the recycling and secondary utilization of the edge-opening material. Moreover, a suitable area distribution is conducive to enabling the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable area distribution is also beneficial to improving the grinding performance of the edge-opening material and extending the life of the edge-opening material.

[0178] Aspect ratio distribution of the edge-opening material

[0179] In one embodiment, the edge-opening material comprises particles. In one embodiment, the particles comprise zirconia and hafnium oxide, silica, and transition metal oxides. In one embodiment, the particles comprise a zirconia-based metal oxide composite. In one embodiment, in the edge-opening material of the present invention, the particles have an aspect ratio distribution.

[0180] Unless otherwise specified, in the present invention, the aspect ratio distribution of the edge-opening material can be obtained based on the scanning electron microscope (SEM) test results. Specifically, the edge-opening material of the present invention can be scanned by a scanning electron microscope to obtain its SEM spectrum, and the SEM spectrum can be subjected to image analysis to obtain the aspect ratio distribution of the edge-opening material. The specific analysis method of the SEM spectrum can be referred to in the Examples section.

[0181] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.3 - 0.5. In a preferred embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.3 - 0.4.

[0182] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.3 or more. In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.5 or less, preferably 0.4 or less. For example, about 0.5, about 0.4, about 0.39, about 0.38, about 0.37, about 0.3.

[0183] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.5 - 0.7. In a preferred embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.5 - 0.6.

[0184] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 10% is about 0.5 or more. In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 50% is about 0.7 or less, preferably 0.6 or less. For example, about 0.7, 0.6, about 0.59, about 0.58, about 0.57, about 0.5.

[0185] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 90% is about 0.8 - 0.9.

[0186] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 90% is about 0.8 or more. In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 90% is about 0.9 or less. For example, about 0.9, about 0.86, about 0.85, about 0.84, about 0.83, about 0.8.

[0187] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 98% is about 0.9 - 0.98.

[0188] In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 98% is about 0.9 or more. In one embodiment, the aspect ratio distribution of the edge-opening material is such that the aspect ratio at which the aspect ratio distribution reaches 98% is about 0.98 or less. For example, about 0.98, about 0.97, about 0.96, about 0.95, about 0.94, about 0.95, about 0.9.

[0189] In one embodiment, the edge-opening material of the present invention comprises zirconia, and at least a part of the zirconia may exist in crystalline form. In a preferred embodiment, the edge-opening material of the present invention comprises zirconia, and at least a part of the zirconia exists in crystalline form, and the zirconia crystal may be monoclinic zirconia.

[0190] Unless otherwise specified, in the present invention, the content of the zirconia crystal can be obtained according to the obtained XRD spectrum by X-ray diffraction (XRD) analysis. The specific analysis method can refer to the embodiment part of the present invention.

[0191] Existence form of zirconia-based metal oxide composite

[0192] In one embodiment, the edge-opening material of the present invention may comprise zirconia, hafnium oxide, silica, and transition metal oxides, wherein at least a portion of the zirconia, hafnium oxide, and silica exist in crystalline form. In a preferred embodiment, the edge-opening material of the present invention may comprise zirconia, hafnium oxide, silica, and transition metal oxides, wherein at least a portion of the zirconia and hafnium oxide form a zirconia-based metal oxide complex with silica, and at least a portion of the zirconia and the zirconia-based metal oxide complex exist in crystalline form, that is, at least a portion of the zirconia-based metal oxide complex exists in crystalline form.

[0193] In a specific embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide complex, and at least a portion of the zirconia-based metal oxide complex may exist in crystalline form. In a specific embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide complex, and at least a portion of the zirconia-based metal oxide complex exists in crystalline form.

[0194] Unless otherwise specified, in the present invention, the content of the zirconia-based metal oxide complex crystals can be obtained by X-ray diffraction (XRD) analysis based on the obtained XRD spectrum. The specific analysis method can refer to the embodiment part of the present invention.

[0195] In one embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide complex, and the zirconia-based metal oxide complex exists in crystalline form, wherein based on the total weight of the zirconia, hafnium oxide, and silica, the amount of the zirconia-based metal oxide complex crystals is about 95 wt% or more. In a preferred embodiment, the edge-opening material of the present invention comprises a zirconia-based metal oxide complex, and the zirconia-based metal oxide complex exists in crystalline form, wherein based on the total weight of the zirconia, hafnium oxide, and silica, the amount of the zirconia-based metal oxide complex crystals is about 97 wt% or more. For example, about 95 wt%, about 96 wt%, about 97 wt%, about 98 wt%, about 99 wt%, about 100 wt%.

[0196] The zirconia-based metal oxide complex in a suitable crystalline form helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance. In addition, the zirconia-based metal oxide complex in a suitable crystalline form helps to improve the lifespan of the edge-opening material, thus facilitating the obtaining of an edge-opening material with both excellent grinding performance and lifespan. Furthermore, the content of the suitable zirconia-based metal oxide complex crystals also helps the edge-opening material of the present invention to achieve improved grinding performance, edge-opening performance, and excellent lifespan.

[0197] Apparent porosity of the edge-opening material

[0198] In one embodiment, the apparent porosity of the edge-opening material of the present invention is about 25% or less. In a preferred embodiment, the apparent porosity of the edge-opening material of the present invention is about 16% or less. For example, about 25%, about 24%, about 23%, about 22%, about 21%, about 20%, about 19%, about 18%, about 17%, about 16%, about 15%, about 14%, about 13%, about 12%, about 11%, about 10%.

[0199] In one embodiment, the apparent porosity of the edge-opening material of the present invention is about 10% or more. In a preferred embodiment, the apparent porosity of the edge-opening material of the present invention is about 12% or more. For example, about 10%, about 11%, about 12%, about 13%, about 14%, about 15%.

[0200] Unless otherwise specified, the apparent porosity of the edge-opening material in the present invention can be detected by the GB / T 2997 standard.

[0201] A suitable apparent porosity of the edge-opening material is beneficial to endow the edge-opening material of the present invention with improved grinding performance and edge-opening performance, and enable the edge-opening material of the present invention to have an excellent service life.

[0202] The inventors unexpectedly found that the apparent porosity of the edge-opening material of the present invention is related to the particle size distribution of the edge-opening material and / or the zirconia-based metal oxide composite. Among them, when the edge-opening material and / or the zirconia-based metal oxide composite has a suitable particle size distribution, the corresponding edge-opening material also has a relatively low and suitable apparent porosity, and the corresponding edge-opening material also has significantly improved edge-opening performance and grinding performance. When the edge-opening material and / or the zirconia-based metal oxide composite does not have a suitable particle size distribution, the corresponding edge-opening material also has an excessively high apparent porosity, and the corresponding edge-opening material has relatively poor edge-opening performance and grinding performance.

[0203] Pore distribution of the edge-opening material

[0204] Unless otherwise specified, in the present invention, the pore distribution of the edge-opening material, that is, the pore size distribution of the edge-opening material, can be detected by a Micromeritics MicroActive AutoPore V specific surface area analyzer through the mercury intrusion method. The specific analysis method can refer to the embodiment part of the present invention.

[0205] In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 10% is about 70 - 180 μm. In a preferred embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 10% is about 90 - 150 μm.

[0206] In one embodiment, the pore size distribution of the edge-opening material is such that the pore size at which the pore size distribution reaches 10% is about 70 μm or more, preferably about 90 μm or more. In one embodiment, the pore size distribution of the edge-opening material is such that the pore size at which the pore size distribution reaches 10% is about 180 μm or less, preferably about 150 μm or less. For example, about 70 μm, about 75 μm, about 80 μm, about 90 μm, about 100 μm, about 105 μm, about 110 μm, about 115 μm, about 116 μm, about 117 μm, about 118 μm, about 119 μm, about 120 μm, about 121 μm, about 122 μm, about 123 μm, about 124 μm, about 125 μm, about 126 μm, about 127 μm, about 128 μm, about 130 μm, about 140 μm, about 150 μm.

[0207] In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 50% is about 17 - 36 μm. In a preferred embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 50% is about 20 - 30 μm.

[0208] In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 50% is about 17 μm or more, preferably about 20 μm or more. In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 50% is about 36 μm or less, preferably about 30 μm or less. For example, about 17 μm, about 18 μm, about 19 μm, about 20 μm, about 21 μm, about 22 μm, about 23 μm, about 24 μm, about 25 μm, about 26 μm, about 27 μm, about 28 μm, about 29 μm, about 30 μm, about 31 μm, about 32 μm, about 33 μm, about 34 μm, about 35 μm, about 36 μm.

[0209] In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 90% is about 0.3 - 8 μm. In a preferred embodiment, the pore size distribution of the edge-opening material of the present invention is such that the pore size at which the pore size distribution reaches 90% is about 1 - 6 μm.

[0210] In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that 90% of the pore sizes are about 0.3 μm or more, preferably about 1 μm or more. In one embodiment, the pore size distribution of the edge-opening material of the present invention is such that 90% of the pore sizes are about 8 μm or less, preferably about 6 μm or less. For example, about 0.3 μm, 0.5 μm, 1 μm, 1.5 μm, 1.8 μm, 2 μm, 2.3 μm, 2.5 μm, 2.8 μm, 3 μm, 3.1 μm, 3.2 μm, 3.3 μm, 3.4 μm, 3.5 μm, 3.6 μm, 3.7 μm, 3.8 μm, 3.9 μm, 4 μm, 4.2 μm, 4.5 μm, 4.8 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm.

[0211] A suitable pore size distribution of the edge-opening material helps the edge-opening material of the present invention to obtain improved grinding performance and edge-opening performance. In addition, when the edge-opening material of the present invention has a suitable pore size distribution, the content of impurities in the material can be effectively reduced, facilitating the recycling and secondary utilization of the edge-opening material. In addition, a suitable pore size distribution is beneficial for the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the material. In addition, a suitable pore size distribution is also beneficial for improving the grinding performance of the edge-opening material and improving the service life of the edge-opening material.

[0212] Bulk density of the edge-opening material

[0213] In one embodiment, the bulk density of the edge-opening material of the present invention is about 3.0 - 5.0 g / cm 3 . In a preferred embodiment, the bulk density of the edge-opening material of the present invention is about 3.5 - 5.0 g / cm 3 . In a more preferred embodiment, the bulk density of the edge-opening material of the present invention is about 3.5 - 4.5 g / cm 3 .

[0214] In one embodiment, the bulk density of the edge-opening material of the present invention is about 3.0 g / cm 3 or more, preferably about 3.5 g / cm 3 or more. In one embodiment, the bulk density of the edge-opening material of the present invention is about 5.0 g / cm 3 or less, preferably 4.5 g / cm 3 or less. For example, about 3.0 g / cm 3 , 3.1 g / cm 3 , 3.2 g / cm 3 , 3.3 g / cm 3 , 3.4 g / cm 3 , 3.5 g / cm 3 , 3.6 g / cm3 , 3.7 g / cm 3 , 3.8 g / cm 3 , 3.9 g / cm 3 , 4.0 g / cm 3 , 4.1 g / cm 3 , 4.2 g / cm 3 , 4.3 g / cm 3 , 4.4 g / cm 3 , 4.5 g / cm 3 , 4.6 g / cm 3 , 4.7 g / cm 3 , 4.8 g / cm 3 , 4.9 g / cm 3 , 5.0 g / cm 3 .

[0215] Unless otherwise specified, in the present invention, the GB / T 2997 standard can be used to detect the bulk density of the edge-opening material.

[0216] A suitable bulk density of the edge-opening material is beneficial for the edge-opening material of the present invention to obtain improved edge-opening performance and grinding performance, and can also ensure that the edge-opening material of the present invention can be successfully prepared and obtained. An excessively low bulk density of the edge-opening material will make the texture of the material loose, making it difficult to prepare and obtain the edge-opening material of the present invention, and even more difficult to prepare the corresponding grinding tool.

[0217] Flexural strength of the edge-opening material

[0218] In one embodiment, the flexural strength of the edge-opening material of the present invention is about 10 - 20 MPa. In a preferred embodiment, the flexural strength of the edge-opening material of the present invention is about 14 - 16 MPa.

[0219] In one embodiment, the flexural strength of the edge-opening material of the present invention is above about 10 MPa, preferably about 14 MPa. In one embodiment, the flexural strength of the edge-opening material of the present invention is below about 20 MPa, preferably about 16 MPa. For example, 10 MPa, 11 MPa, 12 MPa, 13 MPa, 14 MPa, 15 MPa, 16 MPa, 17 MPa, 18 MPa, 19 MPa, 20 MPa.

[0220] Unless otherwise specified, in the present invention, the GB / T 3001 standard can be used to detect the flexural strength of the edge-opening material.

[0221] A suitable flexural strength of the edge-opening material is beneficial for the edge-opening material of the present invention to obtain improved edge-opening performance and grinding performance, and at the same time endows the edge-opening material with excellent lifespan.

[0222] Preparation Method of Edge-opening Material

[0223] On the other hand, the present invention relates to a method for preparing the edge-opening material of the present invention, which includes: providing a precursor raw material of the edge-opening material; processing the precursor raw material to obtain the edge-opening material; wherein, the precursor raw material includes one or more of a zirconium source material, a silicon source material, a zirconium-silicon material, an additive, and an organic binder.

[0224] In one embodiment, the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material includes a zirconium oxide-based metal oxide composite. In a preferred embodiment, the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material includes zirconium silicate. In a preferred embodiment, the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material is zircon.

[0225] In a specific embodiment, the present invention provides a method for preparing the edge-opening material of the present invention, which includes: providing a zirconium source material, a silicon source material, and a transition metal oxide, mixing them, and adding an organic binder and an additive; aging the above mixture and pressing it; firing the pressed mixture to obtain the edge-opening material.

[0226] In a specific embodiment, the present invention provides a method for preparing the edge-opening material of the present invention, which includes: providing a zirconium-silicon material and a transition metal oxide, mixing them, and adding an organic binder and an additive; aging the above mixture and pressing it; firing the pressed mixture to obtain the edge-opening material.

[0227] In a specific embodiment, the present invention provides a method for preparing the edge-opening material of the present invention, which includes: mixing and stirring zircon and a transition metal oxide; adding an aqueous solution of polyvinyl alcohol to the above mixture and stirring; aging the above mixture in a closed container; vibrating the aged mixture, and then pressing the mixture under a constant pressure; demolding the obtained mixture and allowing it to stand for a period of time, and then firing the demolded mixture to obtain the edge-opening material.

[0228] Mixing the components of the edge-opening material

[0229] Stirring the raw material components within a suitable time can fully mix the corresponding components and is conducive to the uniform distribution of particles in the edge-opening material, thereby facilitating the obtaining of an edge-opening material with excellent grinding performance and edge-opening performance.

[0230] In one embodiment, the zirconium source material, the silicon source material, and the transition metal oxide are added to a stirrer for stirring. And stir for 10 - 15 minutes. Adjust the stirring time accordingly according to the amount of raw materials used.

[0231] In one embodiment, the zirconium source material and the silicon source material can be derivatives of various forms of zirconium and silicon. For example, zirconium oxides, zirconium hydroxides, zirconium silicates, silicon oxides, etc.

[0232] In a specific embodiment, the zirconium-silicon material and titanium oxide are added to a stirrer and stirred for 10 - 15 minutes. The stirring time is adjusted accordingly according to the amount of raw materials used.

[0233] In another specific embodiment, zircon sand and titanium oxide are added to a stirrer and stirred for 10 - 15 minutes. The stirring time is adjusted accordingly according to the amount of raw materials used.

[0234] In another specific embodiment, zirconium oxide (containing hafnium oxide), silicon dioxide, and titanium oxide are added to a stirrer and stirred for 10 - 15 minutes. The stirring time is adjusted accordingly according to the amount of raw materials used.

[0235] Gradation of the zirconium source material, silicon source material, and zirconium-silicon material

[0236] In one embodiment, the zirconium source material and / or silicon source material used in the present invention can include zirconium-silicon materials.

[0237] In one embodiment, the zirconium source material, silicon source material, or zirconium-silicon material used in the present invention can include zirconium oxide-based metal oxide composites. In a specific embodiment, the zirconium source material, silicon source material, or zirconium-silicon material used in the present invention includes zirconium silicate. In another specific embodiment, the zirconium source material, silicon source material, or zirconium-silicon material used in the present invention is zircon sand.

[0238] In a specific embodiment, the zirconium source material and / or silicon source material used in the present invention is a zirconium-silicon material having a specific gradation.

[0239] In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, about 25 wt% - 60 wt%, preferably about 30 wt% - 55 wt%, more preferably about 35 wt% - 45 wt% of the zirconium silicate material has a particle size of about 2 - 4 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total amount of the zirconium silicate material, about 5 wt% - 35 wt%, preferably about 10 wt% - 30 wt%, more preferably about 15 wt% - 25 wt% of the zirconium silicate material has a particle size of about 0.5 - 2 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total amount of the zirconium silicate material, about 5 wt% - 35 wt%, preferably about 10 wt% - 30 wt%, more preferably about 15 wt% - 25 wt% of the zirconium silicate material has a particle size of about 0.045 - 0.5 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total amount of the zirconium silicate material, about 10 wt% - 35 wt%, preferably about 15 wt% - 30 wt%, more preferably about 15 wt% - 25 wt% of the zirconium silicate material has a particle size of less than about 0.045 mm.

[0240] In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, more than about 25 wt%, preferably more than about 30 wt%, more preferably more than about 35 wt% of the zirconium silicate material has a particle size of about 2 - 4 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, more than about 5 wt%, preferably more than about 10 wt%, more preferably more than 15 wt% of the zirconium silicate material has a particle size of about 0.5 - 2 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, more than about 5 wt%, preferably more than about 10 wt%, and more preferably more than about 15 wt% of the zirconium silicate material has a particle size of about 0.045 - 0.5 mm. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, more than about 10 wt%, preferably more than about 15 wt% of the zirconium silicate material has a particle size of less than about 0.045 mm.

[0241] In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, the particle size of the zirconium silicate material is about 2 - 4 mm for less than about 60% by weight, preferably less than about 55% by weight, more preferably less than about 45% by weight. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, the particle size of the zirconium silicate material is about 0.5 - 2 mm for less than about 35% by weight, preferably less than about 30% by weight, more preferably less than about 25% by weight. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, the particle size of the zirconium silicate material is about 0.045 - 0.5 mm for less than about 35% by weight, preferably less than about 30% by weight, more preferably less than about 25% by weight. In one embodiment, the grading of the zirconium silicate material of the edge-opening material is such that, based on the total weight of the zirconium silicate material, the particle size of the zirconium silicate material is less than about 0.045 mm for less than about 35% by weight, preferably less than about 30% by weight, more preferably less than about 25% by weight.

[0242] The grading of suitable zirconium source materials, silicon source materials or zirconium silicate materials is conducive to enabling the obtained edge-opening material to have improved edge-opening performance and grinding performance. The grading of suitable zirconium source materials, silicon source materials or zirconium silicate materials is conducive to enabling the edge-opening material of the present invention to have appropriate mechanical strength, thereby improving the edge-opening performance of the edge-opening material. In addition, the grading of suitable zirconium source materials, silicon source materials or zirconium silicate materials is also conducive to improving the grinding performance of the edge-opening material and improving the service life of the edge-opening material.

[0243] Additives and an organic binder are added to the mixture

[0244] In this step, additives are added to and mixed with the above-mentioned stirred mixture. Subsequently, additives are added to the above-mentioned mixture.

[0245] In a preferred embodiment, additives are added to the above-mentioned stirred mixture. In a preferred embodiment, after the additives are fully mixed with the above-mentioned mixture, an aqueous solution of an organic binder is further added.

[0246] In one embodiment, the organic binder is polyvinyl alcohol. In a more preferred embodiment, the organic binder is an aqueous solution of polyvinyl alcohol.

[0247] In one embodiment, polyvinyl alcohol is added to the above-mentioned stirred mixture, and the mixture is further stirred for 15 - 20 minutes. The stirring time is adjusted accordingly according to the amount of raw materials used. In a more preferred embodiment, an aqueous solution of polyvinyl alcohol is added to the above-mentioned stirred mixture, and the mixture is further stirred for 15 - 20 minutes.

[0248] By adding organic fillers, the plasticity of the blank of the edge-opening material can be improved, and the blank of the edge-opening material after molding has improved bonding strength.

[0249] Additive

[0250] In the preparation method of the present invention, the added additive can be a transition metal oxide and / or other oxides.

[0251] In one embodiment, a transition metal oxide is added during the preparation process, which can be used as a sintering aid for the edge-opening material to improve the sintering performance of the edge-opening material. In a specific embodiment, the transition metal oxide includes oxides of titanium, scandium, vanadium, chromium, manganese, yttrium, niobium, molybdenum or a combination thereof. In a preferred embodiment, the transition metal oxide is titanium oxide. Suitable transition metal oxides are beneficial to improving the edge-opening performance of the edge-opening material of the invention, while enabling the edge-opening material to have excellent grinding performance and improving the service life of the edge-opening material.

[0252] In one embodiment, other oxides are added during the preparation process to further improve the performance of the edge-opening material. Other metal oxides that can be used include, but are not limited to, alumina, iron oxide, and magnesia. Suitable other oxides are also beneficial to improving the grinding performance of the edge-opening material, reducing the loss of the edge-opening material during the grinding process, and improving the service life of the edge-opening material.

[0253] Age the above mixture

[0254] In this step, the above mixture is transferred to a closed container to age the above mixture, so that the materials (such as liquid materials and / or solid materials, etc.) are fully mixed, and the liquid materials (such as aqueous solutions, etc.) in the materials are more evenly distributed.

[0255] The aging process can be carried out in a closed container commonly used in the art. In one embodiment, the above mixture is transferred to a sealed bag.

[0256] Aging the mixture is beneficial to fully mixing the components of the mixture and evenly distributing them in the mixture, thereby improving the plasticity and bonding property of the blank of the edge-opening material, and thus improving the forming performance of the blank of the edge-opening material.

[0257] Press the mixture

[0258] In this step, the above-aged mixture is loaded into a mold and the aged mixture is vibrated; then, under a constant pressure, the above-aged mixture is pressed.

[0259] The aged mixture can be vibrated appropriately with a suitable amplitude to evenly disperse the components in the mixture system.

[0260] The vibrated mixture can be pressed under a suitable pressure to obtain a material with desired properties.

[0261] The pressing step can be carried out using equipment commonly used in the art. In one embodiment, an iso press is used to press the vibrated mixture.

[0262] Let it stand for demolding and obtain the edge-opening material of the present invention

[0263] In this step, the pressed mixture is demolded and left standing for a period of time to transfer the blocks; then the demolded mixture is fired to obtain the edge-opening material of the present invention.

[0264] In one embodiment, the demolded mixture is left standing for 1-2 hours and then the blocks are transferred.

[0265] In one embodiment, the demolded mixture is transferred to a kiln car for firing in a furnace therein.

[0266] In one embodiment, the firing is carried out in an oxidizing atmosphere.

[0267] In one embodiment, the maximum temperature for firing the mixture is about 1500 °C or above.

[0268] Uses of Edge-opening Material

[0269] On the other hand, the present invention provides an abrasive tool comprising the edge-opening material of the present invention.

[0270] In one embodiment, the abrasive tool is an edge-opening tool.

[0271] In a preferred embodiment, the abrasive tool is an edge-opening tool for a grinding stone.

[0272] The "grinding stone" described herein refers to a tool for grinding and processing materials. As is known to those skilled in the art, a grinding stone can include a binder and abrasives. The binder in the grinding stone can include a metal binder. The abrasives in the grinding stone can include superhard abrasives.

[0273] A metal binder is a binder that uses a metal or alloy as a bonding material and can manufacture super-grinding and processing materials. The metal binder in the grinding stone can include one or more of copper, tin, cobalt, nickel, lead, iron, silver, and zinc.

[0274] According to the GB / T230 Rockwell hardness test standard, the Rockwell hardness of the metal binder can be about 15-25, preferably about 19-21.

[0275] Superabrasives refer to abrasive materials with relatively high hardness, which are usually used for grinding and cutting superhard materials and other difficult-to-machine materials, such as ceramics, graphite, composite materials, etc. The superabrasives in the grinding stone can be cubic boron nitride, diamond, etc. The superabrasives in the grinding stone can be selected from cubic boron nitride, diamond, and their combinations.

[0276] Beneficial Effects

[0277] The edge-opening material of the present invention contains components with high contents of zirconia and silica (such as zirconium silicate, zirconia, and metal oxide composites), enabling the edge-opening material of the present invention to have excellent edge-opening performance and grinding performance, while also having improved lifespan, and enabling the grinding tool to have excellent edge-opening performance, grinding performance, and lifespan.

[0278] The edge-opening material of the present invention also has a suitable particle size distribution, thereby enabling the edge-opening material of the present invention to have excellent edge-opening performance and grinding performance, and also having improved lifespan.

[0279] In addition, the edge-opening material of the present invention has a suitable apparent porosity. When the apparent porosity of the edge-opening material is 16% or less, the corresponding edge-opening material has excellent edge-opening performance and grinding performance.

[0280] Furthermore, the edge-opening material of the present invention has a suitable bulk density and modulus of rupture. When the edge-opening material has the bulk density and modulus of rupture of the present invention, the corresponding edge-opening material has excellent edge-opening performance and grinding performance.

[0281] Moreover, the edge-opening material of the present invention contains almost no alumina, which can ensure the smooth preparation and acquisition of the edge-opening material of the present invention. This also enables the edge-opening material of the present invention to have suitable edge-opening performance, grinding performance, and lifespan, facilitating the use of the edge-opening material of the present invention in the preparation of corresponding grinding tools, thereby further obtaining grinding tools with excellent edge-opening performance, grinding performance, and lifespan.

[0282] In addition, since the alumina content in the edge-opening material of the present invention is extremely low, when using the edge-opening material to sharpen the grinding block, it will not introduce aluminum elements that are unfavorable to the grinding performance into the grinding block, thereby facilitating the further improvement of the grinding performance of the sharpened grinding block and being conducive to the application scenarios of the edge-opening material of the present invention.

[0283] In addition, the edge-opening material of the present invention has a suitable particle size distribution and volume distribution, enabling the edge-opening material of the present invention to have excellent edge-opening performance and grinding performance, while having improved lifespan.

[0284] Furthermore, in the edge-opening material of the present invention, its components can exist in crystal form in the material, also enabling the edge-opening material of the present invention to have excellent edge-opening performance and grinding performance, while having improved lifespan.

[0285] Examples

[0286] The solution of the present invention will be further described in detail below with reference to specific embodiments.

[0287] It should be noted that the following embodiments are merely examples for clearly illustrating the technical solution of the present invention, rather than limiting the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here, and the obvious changes or modifications derived therefrom are still within the protection scope of the present invention. Unless otherwise specified, the instrument devices and reagent materials used herein are all commercially available.

[0288] Materials

[0289] Zircon: In the zircon used in the embodiments of the present invention, the content of ZrO 2 (including HfO 2 ) is more than 65%, and the content of SiO2 is 32 - 34%.

[0290] Titanium dioxide: In the titanium dioxide used in the embodiments of the present invention, the content of titanium dioxide is more than 90%, the median particle size is 0.8 μm, and the titanium dioxide is in the rutile crystal form.

[0291] Polyvinyl alcohol: An aqueous solution of polyvinyl alcohol with a polymerization degree of 500 - 800 is used in the embodiments of the present invention.

[0292] Property Detection

[0293] (1) Scanning electron microscope:

[0294] The scanning electron microscope spectrum of the edge-opening material is measured by using a Phenom desktop scanning electron microscope.

[0295] Specifically, the scanning electron microscope image of the edge-opening material is measured through the following steps.

[0296] (i) Use a cutting machine to take an appropriate amount of sample from the obtained edge-opening material. For example, the sample can be a cuboid with an area of 20 cm × 20 cm.

[0297] (ii) Place the sample in an embedding mold.

[0298] (iii) After uniformly mixing epoxy resin and a curing agent in a specific ratio (such as 3:1), place it in a vacuum container and evacuate it under a gas pressure environment of -1 MPa or less to remove the air bubbles inside the resin and obtain a clear embedding resin.

[0299] (iv) Pour the above resin into the embedding mold containing the sample, ensuring that the resin covers the top of the sample. Then, place the embedding mold in an oven at 60 °C for 30 minutes, and take it out for demolding after that.

[0300] (v) Place the demolded sample on a polishing machine. Use a 54-μm diamond disc to polish the sample at a pressure of 40 N, a lower disc rotation speed of 100 r / min, and a indenter rotation speed of 200 r / min until the sample surface is exposed. Subsequently, use a 15-μm diamond disc, a pressure of 40 N, a lower disc rotation speed of 100 r / min, and an indenter rotation speed of 100 r / min to eliminate the pits on the sample surface. Finally, use 15-μm hole cloth, 6-μm silk cloth, and 1-μm flannel cloth respectively, at a pressure of 40 N, a lower disc rotation speed of 100 r / min, and an indenter rotation speed of 100 r / min to eliminate the scratches on the sample surface and improve the surface quality of the sample.

[0301] (vi) Take macroscopic photos of the sample using the optical microscope mode of Phenom scanning electron microscope. A scanning electron microscope instrument with the model STRC621-2040 can be used to take the SEM spectrum of the sample. Observe the macroscopic morphology of the sample at a magnification of 20x and take photos.

[0302] (2) Measurement of the particle size distribution of the edge-opening material:

[0303] Obtain the particle size distribution of the edge-opening material from the SEM spectrum of the edge-opening material.

[0304] Specifically, obtain and process the SEM spectrum of the edge-opening material through the following supplements to obtain the particle size distribution of the edge-opening material:

[0305] (i) Obtain the SEM spectrum of the edge-opening material;

[0306] (ii) Perform image processing on the SEM spectrum to adjust the contrast, grayscale, and blurriness of the image, and crop the edge of the SEM picture to an appropriate size; for example, according to the needs of the present invention, after cropping the SEM spectrum, a 10 mm × 10 mm sample picture can be obtained. Those skilled in the art can perform necessary processing on the SEM spectrum according to their experience and actual needs. For example, use the createCLAHE() function and parameters clipLimit = 3.0 (contrast limit threshold); tileGridSize = (5,5) or (8,8) (histogram equalization grid size) in OpenCV to adjust the image contrast, and use the blur() function in OpenCV to blur the image, with the kernel size selected as kernel = (5,5) or (7,7);

[0307] (iii) Use the OpenCV Threshold() function to perform thresholding on the SEM spectrogram to obtain a binary image that requires further processing; those skilled in the art can perform thresholding on the SEM spectrogram according to their experience and actual needs. For example, thresholding can be performed according to the following parameters, type = cv.THRESH_BINARY + cv.THRESH_OTSU);

[0308] (iv) Perform "opening operation" on the thresholded image to remove any small white noise in the image. In this example, the parameters of the morphologyEx() function in OpenCV are selected as: op = cv2.MORPH_OPEN, kernel = cv2.getStructuringElement(cv.MORPH_CROSS, (3, 3)), iteration = 2 or 3;

[0309] (v) Use the OpenCV dilate() function to dilate the result of the "opening operation" to obtain a region that is mostly background. The "determined background" region helps the subsequent steps of the Watershed algorithm, and its purpose is to identify different segments / objects. Those skilled in the art can perform background expansion on the thresholded image according to their experience and actual needs. For example, the following parameters can be used: kernel = cv2.getStructuringElement(cv.MORPH_CROSS, (3, 3)), iteration = 4 or 5;

[0310] (vi) Perform distance transformation through distanceTransform(). Those skilled in the art can perform distance transformation according to their experience and actual needs. For example, the following parameters can be used: cv2.DIST_L2 (Euclidean distance), and the corresponding mask can be 0, 3, 5;

[0311] (vii) Perform thresholding on the distance transformation result to obtain a determined foreground region. The cv2.threshold(dist_transform, 0.3 * dist_transform.max(), 255, 0) function can be used for thresholding. 0.3 * dist_transform.max() can be set as the second parameter to set the threshold level to 30% of the maximum distance found by the distance transformation. Pixels with distance transformation values higher than this threshold are set as the determined foreground. Additionally, the foreground can be dilated according to the following parameters: kernel = numpy.ones((3, 3), dtype = numpy.uint8), iteration = 2;

[0312] (viii) Identifying unknown regions: Identify regions that are neither definitely foreground nor definitely background. Specifically, the sure foreground (sure_fg) can be converted to an unsigned 8-bit integer, and then the sure foreground is removed from the sure background to obtain the unknown region, which will be used in the Watershed algorithm;

[0313] (ix) Labeling the sure background, sure foreground, and unknown regions. Specifically, first use the connectedComponents() of OpenCV to label the connected regions, and the label numbers range from 0 to (N - 1). Since the labels made by the OpenCV watershed algorithm for objects must all be greater than 1 and the background is labeled as 0, all markers are incremented by 1 to become 1 to N, and at the same time, the part belonging to the background region is removed (i.e., made 0 to become the background);

[0314] (x) Watershed algorithm: Apply the OpenCV watershed() to the labeled image obtained in the previous step for the watershed algorithm. After the watershed algorithm, all the pixel points of the contours are labeled as -1. The pixel points labeled as -1 are colored red to obtain the labeled image;

[0315] (xi) Creating a contour image: Create a binary image where only the contour regions recognized by the watershed are in the foreground (pixel value set to 255), and the rest of the image is in the background (pixel value set to 0); Use OpenCV findContours() to identify all the contours in the image. Parameter usage: contour_retrieval = cv2.RETR_EXTERNAL (contour retrieval mode), contours_approximation = cv2.CHAIN_APPROX_SIMPLE (contour approximation method).

[0316] (xii) Traverse all the recognized contours and calculate the area, equivalent diameter, and aspect ratio of the contours. Contours with an area greater than 0 are considered valid contours. Among them, use the cv2.contourArea() function to calculate the area of a single contour, and use the formula to calculate the equivalent diameter of a single contour, and use cv2.minAreaRect() to calculate the length and width of the minimum bounding rectangle of the contour to calculate the aspect ratio (the aspect ratio is the ratio of the smaller side to the larger side). The above calculations are all in pixels and need to be converted according to the actual pixel-to-length ratio of the SEM image, for example, ratio = pixels / mm.

[0317] (3) Grading measurement of zircon raw materials:

[0318] Obtain the grading of the zircon raw materials by sieving the zircon particles.

[0319] Specifically, screening tools with different pore sizes are selected, zircon powder is placed on the screening tools respectively, and the weights of the zircon powder flowing through the screening tools are collected and measured respectively, so as to obtain the gradation of zircon powder with different particle sizes. More specifically, in the embodiments of the present invention, screening tools with the following screen pore sizes and screen mesh numbers are selected to obtain the gradation of zircon raw materials, wherein the pore sizes and mesh numbers of the screening tools conform to the GB / T 6005-2008 standard.

[0320] Mesh Aperture mm Mesh Number 0.045 325 0.5 35 2 8 4 5

[0321] (4) Pore distribution:

[0322] The Micromeritics MicroActive AutoPore V specific surface area analyzer is used to detect the pore distribution of the edge-opening material, and its principle is the mercury intrusion method.

[0323] (5) Apparent porosity:

[0324] The apparent porosity of the edge-opening material is detected according to the GB / T 2997 standard.

[0325] (6) Bulk density:

[0326] The bulk density of the edge-opening material is detected according to the GB / T 2997 standard.

[0327] (7) Modulus of rupture:

[0328] The modulus of rupture of the edge-opening material is detected according to the GB / T 3001 standard.

[0329] (8) XRD detection:

[0330] An X’Pert (PANalytical) diffractometer is used to test and obtain the XRD pattern of the edge-opening material.

[0331] The specific test method is as follows: Through disk grinding, 10 g of the sample to be detected (such as the edge-opening material of the present invention) is ground into powder with a mesh size below 200, and the crystal phase composition of each sample is detected by X-ray diffraction analysis method. Detection instrument: X’Pert (PANalytical), analysis conditions: from 5° to 120° in 2θ, step of 0.0167°, 50 s. The results are analyzed through the High ScorePlus software and the ICDD (The International Centre for Diffraction Data) database.

[0332] The existence form of components in the material can be judged through the above XRD detection and pattern analysis method, and the content of various crystal types can be obtained.

[0333] (9) Grinding performance:

[0334] The following comparison method is used to detect the grinding performance of the edge-opening material, and the grinding effect reflects the grinding performance of the edge-opening material.

[0335] Specifically, (i) A grinding machine commonly used in the art is employed (the grinding machine usually includes a grinding machine spindle, a spindle motor, and a workbench). The workbench surface on the grinding machine can be horizontally moved, and the spindle motor can be vertically moved to adjust the grinding position and depth. During operation, the spindle and the grinding tool (which includes multiple metal-bonded abrasive blocks, where the abrasive grains are diamond, and the Rockwell hardness of the metal binder of the abrasive block is approximately 20, GB / T 230) are rotated to bring the grinding tool into contact with the object to be processed, so as to remove the material on the surface of the object to be processed through the grinding action. By continuously adjusting the movement of the workbench surface and the grinding tool, the required processing shape and accuracy can be obtained. Additionally, before conducting the edge-opening experiment, the edge-opening material is first placed on the workbench surface of the grinding machine, and the edge-opening material is ground through normal grinding operations until the abrasive is completely exposed, and a set of abrasive blocks of the same batch and number is selected, with the size of each abrasive block being 40×16×14 mm respectively;

[0336] (ii) Arrange the above-mentioned abrasive blocks on the grinding machine and enclose them in a circle;

[0337] (iii) Provide 1% grinding fluid for the grinding machine;

[0338] (iv) Adjust the valve of the grinding machine to adjust the circulating water flow rate of the grinding machine to a fixed value, thereby simulating the process of the grinding machine machining zirconium silicate bricks;

[0339] (v) Monitor the current of the abrasive block (usually about 44 A). When the current on the abrasive block fluctuates (within the range of 4 - 8 A) (indicating insufficient sharpness of the abrasive block), use the edge-opening materials of the examples and comparative examples for edge-opening;

[0340] (vi) Monitor the current of the abrasive block while using the edge-opening material for edge-opening. When the module current is stable and returns to the initial current (indicating that the sharpness of the abrasive block has been restored), stop edge-opening;

[0341] (vii) Measure the consumption of the edge-opening material to evaluate the grinding performance of the edge-opening material. Generally, the less the consumption of the edge-opening material, the less the edge-opening material consumed to achieve the edge-opening performance, that is, the better the grinding effect of the edge-opening material.

[0342] (10) XRF detection:

[0343] Through disk grinding, grind 5 g of the sample to be detected into powder with a particle size below 200 mesh, weigh 1.2 g of the powder, and mix it with 6 g of Li2 B 4 O 7 Mix and melt the sample to prepare a glass slide. Detect the oxide content of the sample by X-ray fluorescence analysis method.

[0344] Preparation Example

[0345] Preparation Example 1 Preparation of the edge-opening material of the present invention

[0346] Prepare the edge-opening materials 1-2 according to the composition and content in the following table and according to the method of the present invention. The specific method is as follows:

[0347] (1) In a stirrer, mix zircon and titanium oxide with the contents in the following table, and stir the mixture for 10-15 minutes;

[0348] (2) Add an aqueous solution of polyvinyl alcohol to the stirred mixture, and continue to stir the mixture for 15-20 minutes; wherein, the amount of polyvinyl alcohol is 2.7% relative to the amount of zircon and titanium oxide;

[0349] (3) Transfer the above mixture to a sealed bag and age the mixture for 24 hours;

[0350] (4) Transfer the above-aged mixture to a mold and vibrate the mold 80 times at an amplitude of 1 inch;

[0351] (5) Seal the vibrated mixture again, reduce the ambient pressure to 0.1 MPa, and maintain this pressure for 2-4 hours;

[0352] (6) Use an iso press to press the vibrated mixture, adjust the pressure in the space where the mixture is located to a maximum pressure of 125 MPa, and maintain it for 2 minutes;

[0353] (7) Demold the above mixture, let the demolded mixture stand for 1-2 hours, and then transfer it to a building block;

[0354] (8) Place the above-demolded mixture on a kiln car, in an atmosphere of oxidizing gas, and fire the mixture in a kiln; wherein the highest firing temperature is above 1500 °C;

[0355] (9) Unload the fired mixture after taking it out of the kiln to obtain the edge-opening material.

[0356] Specifically, when preparing the edge-opening material 1, zircon with the following gradation is used.

[0357] Table 1 Gradation of zircon raw materials in the example

[0358] 2 - 4mm 0.5 - 2mm 0.045 - 0.5mm Below 0.045mm Edge-opening Material 1 40.0％ 20.0％ 20.0％ 20.0％

[0359] The obtained example sharpened material has the composition shown in the following Table 2. The composition of the sharpened material 1 was obtained by the above-mentioned XRF detection method.

[0360] Table 2 Composition of the cutting material of the cutting material of the embodiment

[0361] Components Edge-opening Material 1 <![CDATA[Sodium 2 O]]> 0.03 MgO 0.02 <![CDATA[Al 2 O 3 > ≤0.9 <![CDATA[SiO 2 > 32.0 <![CDATA[P 2 O 5 > 0.23 <![CDATA[K 2 O]]> 0.01 CaO 0.06 <![CDATA[TiO 2 > 1.01 <![CDATA[Fe 2 O 3 > 0.08 <![CDATA[Y 2 O 3 > 0.14 <![CDATA[ZrO 2 > 64.2 <![CDATA[HfO 2 > 1.3

[0362] Preparation Example 2 Preparation of Comparative Example Sharpening Material

[0363] According to the composition and content in the following table, comparative sharpened material 1-3 was prepared by a method similar to that of sharpened material 1-2, wherein:

[0364] When preparing comparative edged materials 1-3, zircon having the following gradation was used.

[0365] Table 3 Comparison of the grading of zircon raw materials for cutting edge materials

[0366] 2 - 4mm 0.5 - 2mm 0.045 - 0.5mm Below 0.045mm Comparative Edge-opening Material 1 - - 80.0％ 20.0％ Comparative Edge-opening Material 2 - - 60.0％ 40.0％ Comparative Edge-opening Material 3 20.0％ 20.0％ 20.0％ 40.0％

[0367] The obtained comparative example sharpened materials have the compositions shown in the following Table 4. The compositions of comparative sharpened materials 1 and 2 were obtained by the above-mentioned XRF detection method.

[0368] Table 4 Comparative Example Sharpening Material Composition of Sharpening Material

[0369] Comparative Edge-opening Material 1 Comparative Edge-opening Material 2 <![CDATA[Sodium 2 O]]> 0.02 0.03 MgO 0.02 0.02 <![CDATA[Al 2 O 3 > ≤0.9 ≤0.9 <![CDATA[SiO 2 > 32.8 32.7 <![CDATA[P 2 O 5 > 0.13 0.16 <![CDATA[K 2 O]]> 0.02 0.01 CaO 0.06 0.06 <![CDATA[TiO 2 > 0.30 0.47 <![CDATA[Fe 2 O 3 > 0.08 0.07 <![CDATA[Y 2 O 3 > 0.14 0.14 <![CDATA[ZrO 2 > 64.5 64.4 <![CDATA[HfO 2 > 1.32 1.31

[0370] Test Example

[0371] Scanning electron microscope spectrum of the edged material of test example 1

[0372] The Phenom desktop scanning electron microscope was used to perform scanning electron microscope tests on the edged material 1 and the comparative edged material 1-2 to preliminarily observe the particle gradation of the edged materials. For the relevant scanning electron microscope spectra, see Figures 2 - 7 (Blade material 1), Figure 11 (Compared with sharpened material 1) and Figure 16 (Compare with sharpened material 2). Among them, three sampling points were selected in the sharpened material, and the scanning electron microscope images of the three sampling points were obtained respectively. Figure 2 , Figure 4 and Figure 6 .

[0373] according to Figure 2 , Figure 4 and Figure 6 It can be seen that the edged material 1 has particles of appropriate particle sizes, which contain oxides of various particle size ranges.

[0374] according to Figure 11 as well as Figure 16It can be seen that the edge-opening material 1-2 only contains particles with small particle sizes.

[0375] Testing the particle size distribution of the edge-opening material in Example 2

[0376] After obtaining the SEM spectra of the edge-opening material and the comparative edge-opening material, the image processing of the spectra is carried out according to the above method to obtain the quantified particle size distribution, area distribution and aspect ratio distribution of the edge-opening material and the comparative edge-opening material. The specific results can be seen in Table 5-10 below and Figures 3 - 18 .

[0377] Specifically, the SEM spectra of the 3 sampling points of Figure 2 , Figure 4 and Figure 6 are analyzed and processed respectively according to the above method to obtain Figure 3 , Figure 5 , Figure 7 The processed SEM spectra. According to the above method, after further analyzing the above 3 scanning electron microscope images and comprehensively obtaining the data, the following particle size distribution, area distribution and aspect ratio distribution can be obtained.

[0378] For the edge-opening material 1, the analysis of its SEM spectrum can obtain Figure 8 and the particle size distribution shown in Table 5 below.

[0379] Table 5 Particle size distribution of the edge-opening material 1

[0380] Percentage Equivalent Particle Size (mm) 10％ 0.66 50％ 1.13 90％ 1.97 98％ 3.20 100％ 3.79

[0381] According to the particle size distribution in Table 5, the particle size distribution of the edge-opening material 1 is that the equivalent diameter D 10 at which the cumulative particle size distribution reaches 10% is 0.66 mm; the equivalent diameter D 50 at which the cumulative particle size distribution reaches 50% is 1.13 mm; the equivalent diameter D 90 at which the cumulative particle size distribution reaches 90% is 1.97 mm; the equivalent diameter D 98 at which the cumulative particle size distribution reaches 98% is 3.2 mm; the equivalent diameter D 100 at which the cumulative particle size distribution reaches 100% is 3.79 mm.

[0382] For the edge-opening material 1, the analysis of its SEM spectrum can obtain Figure 9 and the aspect ratio distribution shown in the table below.

[0383] Table 6 Aspect ratio distribution of the edge-opening material 1

[0384] Percentage Aspect Ratio 10％ 0.38 50％ 0.57 90％ 0.85 98％ 0.95 100％ 0.98

[0385] According to the aspect ratio distribution in Table 6, the aspect ratio distribution of the edge-opening material 1 is as follows: the aspect ratio at which the aspect ratio distribution reaches 10% is approximately 0.38; the aspect ratio at which the aspect ratio distribution reaches 50% is 0.57; the aspect ratio at which the aspect ratio distribution reaches 90% is 0.85; the aspect ratio at which the aspect ratio distribution reaches 98% is 0.95; the aspect ratio at which the aspect ratio distribution reaches 100% is 0.98.

[0386] For the edge-opening material 1, the analysis of its SEM spectrogram can obtain Figure 10 and the particle area distribution shown in the following table.

[0387] Table 7 Area distribution of the edge-opening material 1

[0388] Percentage <![CDATA[Area (mm 2 )]]> 10％ 0.34 50％ 1.00 90％ 3.03 98％ 8.09 100％ 11.26

[0389] According to the area distribution in Table 7, the area distribution of the edge-opening material 1 is as follows: the area at which the cumulative area distribution reaches 10% is 0.34 mm 2 ; the area at which the cumulative area distribution reaches 50% is 1.00 mm 2 ; the area at which the cumulative area distribution reaches 90% is 3.03 mm 2 ; the area at which the cumulative area distribution reaches 98% is 8.09 mm 2 ; the area at which the cumulative area distribution reaches 100% is 11.26 mm 2 .

[0390] For the comparative edge-opening material 1, the analysis of its SEM spectrogram can obtain Figure 13 and the particle size distribution shown in the following table.

[0391] Table 8 Particle size distribution of the comparative edge-opening material 1

[0392] Percentage Equivalent Particle Size (mm) 10％ 0.13 50％ 0.22 90％ 0.42 98％ 0.59 100％ 1.12

[0393] According to the particle size distribution in Table 8, the particle size distribution of the comparative edge-opening material 1 is as follows: the equivalent diameter D 10 at which the cumulative particle size distribution reaches 10% is 0.13 mm; the equivalent diameter D 50 at which the cumulative particle size distribution reaches 50% is 0.22 mm; the equivalent diameter D 90 at which the cumulative particle size distribution reaches 90% is 0.42 mm; the equivalent diameter D 98 at which the cumulative particle size distribution reaches 98% is 0.59 mm; the equivalent diameter D 100 at which the cumulative particle size distribution reaches 100% is 1.12 mm.

[0394] For the comparative edge-opening material 1, the analysis of its SEM spectrogram can obtain Figure 14 and the aspect ratio distribution shown in the following table.

[0395] Table 9 Aspect ratio distribution of the comparative edge-opening material 1

[0396] Percentage Aspect Ratio 10％ 0.47 50％ 0.67 90％ 0.92 98％ 0.99 100％ 1.00

[0397] According to the aspect ratio distribution in Table 9, for the edge-opening material 1, the aspect ratio distribution is as follows: the aspect ratio at which the aspect ratio distribution reaches 10% is approximately 0.47; the aspect ratio at which the aspect ratio distribution reaches 50% is 0.67; the aspect ratio at which the aspect ratio distribution reaches 90% is 0.92; the aspect ratio at which the aspect ratio distribution reaches 98% is 0.99; the aspect ratio at which the aspect ratio distribution reaches 100% is 1.00.

[0398] For the edge-opening material 1, the analysis of its SEM spectrum can obtain Figure 15 and the particle area distribution shown in the following table.

[0399] Table 10 Area distribution of the edge-opening material 1

[0400] Percentage <![CDATA[Area (mm 2 )]]> 10％ 0.014 50％ 0.038 90％ 0.139 98％ 0.273 100％ 0.981

[0401] According to the area distribution in Table 10, for the edge-opening material 1, the area distribution is as follows: the area at which the cumulative area distribution reaches 10% is 0.014 mm 2 ; the area at which the cumulative area distribution reaches 50% is 0.038 mm 2 ; the area at which the cumulative area distribution reaches 90% is 0.139 mm 2 ; the area at which the cumulative area distribution reaches 98% is 0.273 mm 2 ; the area at which the cumulative area distribution reaches 100% is 0.981 mm 2 .

[0402] According to the data in the above table and the attached drawings, it can be seen that by using the method of the present invention to prepare the edge-opening material, the obtained edge-opening material has a suitable particle size distribution, area distribution and aspect ratio distribution.

[0403] Among them, according to the data of the particle size distribution, the equivalent particle diameters of the edge-opening material 1 when the cumulative particle size distribution reaches 10%, 50%, 90%, 98% and 100% are significantly larger than those of the comparative edge-opening material 1. Correspondingly, the areas of the edge-opening material 1 when the cumulative density distribution reaches 10%, 50%, 90%, 98% and 100% are significantly higher than those of the comparative edge-opening material 1.

[0404] In addition, compared with Figures 13 - 15 and Figures 17 - 18 , the particle size distribution diagram of the edge-opening material 1 ( Figures 8 - 10 ) shows that the edge-opening material 1 contains edge-opening material components with different particle diameters, including large-particle-diameter edge-opening material components. While Figures 13 - 15 and Figures 17 - 18 show that the comparative edge-opening material 1-2 does not contain large-particle-diameter edge-opening material components, but only contains a large number of small-particle-diameter edge-opening material components.

[0405] Test Example 3 Pore Distribution of Edge-opening Material

[0406] Using a Micromeritics MicroActive AutoPore V specific surface area analyzer, the pore distributions of edge-opening material 1 and comparative edge-opening material 1-2 were measured to obtain the pore distribution data of the edge-opening material.

[0407] Based on the pore distribution data obtained in this example, the inventor plotted the pore distribution diagram of the edge-opening material. For details, see Figure 1 .

[0408] According to Figure 1 it can be seen that compared with comparative edge-opening material 1-2, edge-opening material 1 has a wider incremental pore volume distribution.

[0409] The data results of the pore distribution diagram also precisely confirmed the data of the particle size distribution test, that is, the pore distribution test results also confirmed that edge-opening material 1 contains material components with larger particle sizes (such as 2-4 mm), while comparative edge-opening material 1-2 only contains material components with smaller particle sizes (such as less than 0.5 mm).

[0410] Based on the pore distribution data obtained in this example, the inventor obtained the pore size distribution of edge-opening material 1 as Figure 22 shown. In addition, the inventor also obtained the pore size distribution data as shown in Table 11 below.

[0411] Table 11 Pore Size Distribution of Edge-opening Material 1

[0412] Aperture (μm) Cumulative Aperture Distribution Percentage 120.86 9.49 104.33 11.42 30.25 45.14 24.20 51.38 4.68 88.27 3.70 91.48

[0413] According to the pore size distribution in Table 11, the pore size distribution of edge-opening material 1 is as follows: the pore size with a pore size distribution of 9.49% is 120.86 μm; the pore size with a pore size distribution of 11.42% is 104.33 μm; the pore size with a pore size distribution of 45.14% is 30.25 μm; the pore size with a pore size distribution of 51.38% is 24.30 μm; the pore size with a pore size distribution of 88.27% is 4.68 μm; the pore size with a pore size distribution of 91.48% is 3.70 μm.

[0414] Test Example 4 Apparent Porosity Detection of Edge-opening Material

[0415] Using the GB / T 2997 standard, the apparent porosities of edge-opening material 1 and comparative edge-opening material 1-3 were measured to obtain the apparent porosity of the edge-opening material. The relevant test data are shown in Table 12 below.

[0416] Table 12 Apparent Porosity of Edge-opening Material

[0417] Apparent Porosity (%) Edge-opening Material 1 15.42％ Comparative Edge-opening Material 1 23.16％ Comparative Edge-opening Material 2 17.72％ Comparative Edge-opening Material 3 18.43％

[0418] According to the apparent porosity test data in the above table, compared with the contrast edge-opening materials 1-3, the edge-opening material 1 has a relatively lower apparent porosity.

[0419] Thus, when the edge-opening material has a suitable particle gradation, the obtained edge-opening material has a relatively lower porosity.

[0420] Test Example 5 Bulk density of the edge-opening material

[0421] Adopt the GB / T 2997 standard to measure the bulk density of the edge-opening material 1 and the contrast edge-opening materials 1-3 to obtain the bulk density of the edge-opening material. The relevant test data are shown in Table 13 below.

[0422] Table 13 Bulk density of the edge-opening material

[0423] <![CDATA[Bulk density (g / cm 3 )]]> Edge-opening Material 1 3.80 Comparative Edge-opening Material 1 3.54 Comparative Edge-opening Material 2 3.80 Comparative Edge-opening Material 3 3.77

[0424] The data of the bulk density test of the edge-opening material show that when there is a suitable particle distribution, the edge-opening material containing the particles has a suitable bulk density.

[0425] Test Example 6 Modulus of rupture of the edge-opening material

[0426] Adopt the GB / T 3001 standard to measure the modulus of rupture of the edge-opening material 1 and the contrast edge-opening materials 1-3 to obtain the modulus of rupture of the edge-opening material. The relevant test data are shown in Table 14 below.

[0427] Table 14 Modulus of rupture of the edge-opening material

[0428] Flexural Strength (MPa) Edge-opening Material 1 14.85 Comparative Edge-opening Material 1 13.60 Comparative Edge-opening Material 2 25.90 Comparative Edge-opening Material 3 21.35

[0429] It is known to those skilled in the art that for the edge-opening material, the more suitable the modulus of rupture, the stronger the grinding performance of the corresponding edge-opening material.

[0430] According to the modulus of rupture test data in the above table, compared with the contrast edge-opening materials 2-3, the edge-opening material 1 has a lower modulus of rupture. This indicates that when the edge-opening material has a suitable modulus of rupture, the corresponding edge-opening material can have relatively stronger grinding performance.

[0431] Test Example 7 Edge-opening performance and grinding performance of the edge-opening material

[0432] The above method was used to measure the edged material 1 and the comparative edged material 1 to evaluate their edged performance and grinding performance. In addition, a commercially available edged brick (brand: Lifa, model: 400×230×230) was also selected and the same method was used to measure its grinding performance. The relevant test data is shown in Table 16 below. In addition, the information of the comparative edged material and the test results of the edged performance are shown in Table 15 below.

[0433] Table 15 Information of comparative example sharpening materials

[0434] Grinding Area Grinding Depth Edge-opening Effect Commercially Available Edge-opening Bricks 400×230 mm 25mm Good Edge-opening Material 1 230×200mm 25mm Good

[0435] Table 16 Grinding performance of edged materials

[0436]

[0437] As described above, this test embodiment 7 uses a grinder to simulate the process of processing zirconium silicate bricks. Usually, when a grinder is used for processing and production, when the working current of the grinding block increases, it indicates that the exposed corundum particles on the grinding block will be consumed. In order to maintain the processing efficiency of the grinder, it is necessary to use a sharpening material to sharpen the grinding block so that the remaining corundum particles in the module are exposed on the surface of the grinding block. If the sharpening material can provide a good sharpening effect, the working current of the grinding block will return to the initial stable level, thereby ensuring that the grinder maintains high-efficiency processing and production. Therefore, this test embodiment determines the starting time and end point of sharpening by detecting the grinding block current.

[0438] In addition, if the sharpening material performs sharpening operations on the grinding block multiple times or performs sharpening operations on the grinding block for a long time, but still cannot restore the working current of the grinding block to the initial stable level, this indicates that the sharpening operation of the sharpening material cannot fully expose the abrasive (such as diamond grains) on the surface of the grinding block. The reason for the above phenomenon may be that the sharpening material causes the abrasive to fall off during the sharpening process, thereby affecting the sharpening effect. If such a situation occurs, it will also be determined as the end point of the test after confirmation.

[0439] According to the method of this test embodiment, at the end of the sharpening operation, we will compare the volume of the sharpened material before and after the sharpening operation to obtain the volume of the sharpened material ground, so as to evaluate the grinding performance of the sharpened material. Among them, the smaller the volume of the sharpened material ground, the less material is consumed to achieve the sharpening effect, which means that the grinding performance of the sharpened material is better.

[0440] According to the grinding performance data in Table 16, compared with the comparative sharpening material 1 and the commercially available sharpening material (the grinding volume is 1188cm 3 and 1156cm 3 ), to achieve the same sharpening effect, the sharpening material 1 consumes only 750cm3 This indicates that the edge-opening material of the present invention has significantly improved grinding performance compared with the edge-opening materials of the prior art.

[0441] In addition, compared with Comparative Edge-Opening Material 1, the edge-opening material of Edge-Opening Material 1 has significantly lower apparent porosity. Therefore, according to the test results of Test Example 7 of the present invention, the edge-opening material of the present invention has a relatively low apparent porosity, and has a suitable particle size distribution, area distribution, and aspect ratio distribution, which is beneficial to endowing the edge-opening material with improved grinding performance.

[0442] XRD Test and Crystal Form Content of Edge-Opening Material in Test Example 8

[0443] The XRD spectrum of the edge-opening material was obtained by the above-mentioned instrument, and the XRD test results were analyzed through High Score Plus software and the ICDD (The International Centre for Diffraction Data) database to obtain the percentages of zirconium silicate crystal form and monoclinic zirconia crystal form (crystal form of zirconia) in the product relative to the total amount of zirconium-containing crystal forms.

[0444] The crystal form percentages of the edge-opening material and the comparative edge-opening materials are shown in Table 17 below.

[0445] Table 17 Crystal Form Percentages of Edge-Opening Material and Comparative Edge-Opening Materials

[0446] Edge-opening Material 1 Comparative Edge-opening Material 1 Comparative Edge-opening Material 2 Zirconium Silicate Crystal Form ≥97 wt% ≥97 wt% ≥97 wt% Monoclinic Zircon Crystal Form ≤2 wt% ≤2 wt% ≤2 wt%

[0447] According to the XRD test results, the XRD pattern of Edge-Opening Material 1 has diffraction peaks at the following 2θ: approximately 40.67°, 55.61°, 68.88°, 71.13°, 78.63°, 81.77°, 88.80°, 95.04°, 106.97°, 107.75°, 113.65°, 128.22°, and 137.77°.

[0448] According to the results of Test Example 8, Edge-Opening Material 1, Comparative Edge-Opening Material 1, and Comparative Edge-Opening Material 2 all contain a very high content of zirconium silicate crystal form. According to the results of the above test examples, it can also be known that Edge-Opening Material 1 also has more excellent grinding performance.

[0449] The above are only specific embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent transformation made using the present invention, directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A sharpening material, comprising Based on the total weight of the sharpening material, about 60 wt% - 68 wt% of zirconia and hafnium oxide; about 30 wt% - 38 wt% of silica; about 0.2 wt% - 5 wt% of transition metal oxides.

2. The sharpening material of claim 1, wherein Based on the total weight of the sharpening material, the sharpening material comprises less than about 5 wt% of other oxides.

3. The sharpening material of claim 1, wherein Based on the total weight of the sharpening material, the sharpening material comprises about 63 wt% - 66 wt% of zirconia and hafnium oxide; about 31 wt% - 34 wt% of silica; about 0.5 wt% - 1.5 wt% of transition metal oxides; and less than about 5 wt% of other oxides.

4. The sharpening material according to any one of claims 1 - 3, wherein the weight ratio of zirconia and hafnium oxide is about 30:1 - about 70:1, preferably about 40:1 - about 60:1, more preferably about 45:1 - about 55:

1.

5. A sharpening material, comprising Based on the total weight of the sharpening material, more than about 90 wt% of zirconia - based metal oxide complex, less than about 5 wt% of transition metal oxides, and optionally, less than about 5 wt% of other oxides; Preferably, Based on the total weight of the sharpening material, the sharpening material comprises more than about 93 wt% of zirconia - based metal oxide complex; less than about 2 wt% of transition metal oxides; and less than about 3 wt% of other oxides; More preferably, Based on the total weight of the sharpening material, the sharpening material comprises more than about 94 wt% of zirconia - based metal oxide complex; and less than about 1.5 wt% of transition metal oxides less than about 1.5 wt% of other oxides.

6. The sharpening material of claim 5, wherein the zirconia - based metal oxide complex includes zirconium silicate, zirconia, silica, hafnium oxide or a combination thereof; Preferably, the zirconia - based metal oxide complex includes zirconia, silica, hafnium oxide and combinations thereof; Preferably, the zirconia - based metal oxide complex is zirconium silicate.

7. The sharpening material according to any one of claims 1 - 6, wherein the transition metal oxides include oxides of titanium, scandium, vanadium, chromium, manganese, yttrium, niobium, molybdenum or a combination thereof; and / or the other oxides include calcium oxide, aluminum sesquioxide, phosphorus pentoxide or a combination thereof; Preferably, the transition metal oxide is titanium oxide.

8. The sharpening material according to any one of claims 1 - 7, wherein the particle size distribution of the sharpening material is The equivalent particle size D at which the cumulative particle size distribution reaches 10% 10 is about 0.3 - 0.9 mm; The equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 0.6 - 1.5 mm; The equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 0.9 - 2.5 mm; The equivalent particle size D at a cumulative particle size distribution of 98% 98 is about 1.6 - 6 mm; Preferably, the particle size distribution of the sharpening material is The equivalent particle size D at which the cumulative particle size distribution reaches 10% 10 is about 0.5 - 0.7 mm; The equivalent particle size D at which the cumulative particle size distribution reaches 50% 50 is about 1 - 1.3 mm; The equivalent particle size D at which the cumulative particle size distribution reaches 90% 90 is about 1.5 - 2 mm; The equivalent particle size D at which the cumulative particle size distribution reaches 98% 98 is about 3 - 5 mm.

9. The sharpening material according to any one of claims 1 - 8, wherein the area distribution of the sharpening material is The area where the cumulative area distribution reaches 10% is approximately 0.05 - 0.9 mm 2 ; The area at which the cumulative area distribution reaches 50% is about 0.2 - 2 mm 2 ; The area with a cumulative area distribution of 90% is approximately 0.6 - 5 mm 2 ; The area with a cumulative area distribution of 98% is approximately 2.0 - 30 mm 2 ; Preferably, The area distribution of the edge-opening material is such that the area with a cumulative area distribution reaching 10% is approximately 0.3 - 0.7 mm 2 ; The area where the cumulative area distribution reaches 50% is approximately 0.8 - 1.5 mm 2 ; The area at which the cumulative area distribution reaches 90% is about 2.5 - 3.5 mm 2 ; The area at which the cumulative area distribution reaches 98% is approximately 6.0 - 20 mm 2 .

10. The sharpening material according to any one of claims 1 - 9, wherein the pore size distribution of the sharpening material is that the pore size at 10% of the pore size distribution is about 70 - 180 μm; the pore size at 50% of the pore size distribution is about 17 - 36 μm; the pore size at 90% of the pore size distribution is about 0.3 - 8 μm; Preferably, The pore size distribution of the edge-opening material is such that the pore size at 10% of the pore size distribution is about 90 - 150 μm; the pore size at 50% of the pore size distribution is about 20 - 30 μm; the pore size at 90% of the pore size distribution is about 1 - 6 μm.

11. The edge-opening material according to any one of claims 1 - 10, wherein the edge-opening material comprises zirconia and hafnium oxide, silica, transition metal oxides, at least part of the zirconia and hafnium oxide, silica exist in crystalline form; Preferably, at least part of the zirconia and hafnium oxide form a zirconia-based metal oxide complex with silica, and at least part of the zirconia, zirconia-based metal oxide complex exist in crystalline form; More preferably, the zirconia-based metal oxide complex is zirconium silicate; at least part of the zirconia, zirconium silicate exist in crystalline form.

12. The edge-opening material according to claim 11, wherein based on the total weight of the zirconia and hafnium oxide, silica, the amount of the zirconia-based metal oxide complex crystals is about 95 wt% or more; Preferably, based on the total weight of the zirconia and hafnium oxide, silica, the amount of the zirconia-based metal oxide complex crystals is about 97 wt% or more.

13. The edge-opening material according to any one of claims 1 - 12, wherein the apparent porosity of the edge-opening material is about 25% or less, preferably about 16% or less; and / or The bulk density of the edge-opening material is about 3.0 - 5.0 g / cm 3 , preferably about 3.5 - 4.5 g / cm 3 ; and / or the fracture modulus of the edge-opening material is about 10 - 20 MPa, preferably about 14 - 16 MPa.

14. The edge-opening material according to any one of claims 1 - 13, wherein based on the total weight of the edge-opening material, the content of alumina is about 1 wt% or less.

15. A method for preparing the edge-opening material according to any one of claims 1 - 14, which comprises: providing a precursor raw material for the edge-opening material; processing the precursor raw material to obtain the edge-opening material; wherein, the precursor raw material includes one or more of a zirconium source material, a silicon source material, a zirconium-silicon material, an additive, an organic binder.

16. The method according to claim 15, wherein the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material includes a zirconia-based metal oxide complex; Preferably, the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material includes zirconium silicate; Preferably, the zirconium source material and the silicon source material include a zirconium-silicon material, and the zirconium-silicon material is zirconolite.

17. The method according to claim 16, wherein the grading of the zirconium-silicon material is such that, based on the total weight of the zirconium-silicon material, about 25 wt% - 60 wt% of the zirconium-silicon material has a particle size of about 2 - 4 mm; about 5 wt% - 35 wt% of the zirconium-silicon material has a particle size of about 0.5 - 2 mm; about 5 wt% - 35 wt% of the zirconium-silicon material has a particle size of about 0.045 - 0.5 mm; about 10 wt% - 35 wt% of the zirconium-silicon material has a particle size of about 0.045 mm or less; Preferably, the grading of the zirconium-silicon material is such that, based on the total amount of the zirconium-silicon material, about 30 wt% - 55 wt% of the zirconium-silicon material has a particle size of about 2 - 4 mm; The particle size of about 10 wt% - 30 wt% of the zirconium silicate material is about 0.5 - 2 mm; The particle size of about 10 wt% - 30 wt% of the zirconium silicate material is about 0.045 - 0.5 mm; The particle size of about 15 wt% - 30 wt% of the zirconium silicate material is about 0.045 mm or less.

18. An abrasive tool comprising the edge-opening material according to any one of claims 1 - 14; Preferably, the abrasive tool is an edge-opening tool; More preferably, the abrasive tool is an edge-opening tool for a grindstone.

Images