High proportion of sodium feldspar glaze, ceramic tile and ceramic tile preparation method

Abstract

The application relates to the technical field of ceramics, and discloses a high-proportion albite glaze, a ceramic tile and a ceramic tile preparation method.The preparation raw material of the high-proportion albite glaze comprises albite, potassium feldspar, quartz, clay minerals, calcite, talc, zinc oxide and zirconium silicate.By increasing the proportion of albite in the glaze, the glaze firing temperature can be significantly reduced, the holding time can be shortened, energy consumption can be reduced, and high-proportion albite can effectively promote the stable overflow of gas in the glaze firing process, so that defects such as pinholes, bubbles and orange peel can be greatly reduced, and the flatness and gloss of the glaze surface can be improved.In addition, through the synergistic effect of high-proportion albite, calcite and zinc oxide, the high-temperature melting characteristics and crystallization behavior of the glaze can be synergistically controlled, the opalescent effect and the white and smooth feeling of the glaze surface can be improved at a lower cost without using too much high-cost opacifying agent, and the color and luster of the glaze surface are uniform and soft.

Description

Technical Field

[0001] This invention relates to the field of ceramic technology, and in particular to a high-proportion sodium feldspar glaze, ceramic tiles, and a method for preparing ceramic tiles. Background Technology

[0002] In ceramic tile production, glazes often suffer from pinholes, bubbles, unstable opacity, and poor acid and corrosion resistance. These defects severely impact the product's appearance, grade, and commercial value. Traditional solutions for pinholes and bubbles typically involve increasing firing temperature or extending holding time, but this leads to a significant increase in energy consumption and may cause other glaze defects or body deformation. Adding chemical raw materials such as barium carbonate, zirconium silicate, and tin oxide can also adjust glaze properties and improve opacity, but this is costly, and some raw materials pose environmental and health risks.

[0003] It is evident that existing technologies need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a high-proportion sodium feldspar glaze, ceramic tile, and ceramic tile preparation method, which aims to solve the technical problems of high energy consumption, easy to cause secondary defects, high cost, and environmental and health risks in existing solutions for problems such as pinholes, bubbles, and unstable turbidity of ceramic tile glaze.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: The first aspect of the present invention provides a high-proportion albite glaze, the raw materials for which are prepared by weight include: 30-60 parts albite, 10-15 parts potassium feldspar, 10-30 parts quartz, 5-20 parts clay minerals, 5-15 parts calcite, 5-15 parts talc, 3-5 parts zinc oxide, and 2-5 parts zirconium silicate.

[0006] The high-proportion sodium feldspar glaze also includes, by weight, 8-10 parts of boron-titanium-phosphorus frit.

[0007] In the high-proportion sodium feldspar glaze, the boron-titanium-phosphorus frit, by mass percentage, comprises the following chemical composition: SiO2: 48.5%–49.0%, Al2O3: 7.7%–8.0%, B2O3: 10.0%–10.3%, CaO: 6.8%–7.1%, MgO: 1.3%–1.5%, Na2O: 7.6%–7.9%, P2O5: 5.6%–5.9%, TiO2: 2.4%–2.7%, CaF2: 4.1%–4.3%, with the balance being loss on ignition.

[0008] In the high-proportion sodium feldspar glaze, the clay mineral is at least one of kaolinite and spherical clay.

[0009] The high-proportion sodium feldspar glaze, by weight, also includes: 0-1 parts of inorganic pigment; the inorganic pigment is at least one of cobalt iron black, cobalt blue, chrome green, zirconium iron red, praseodymium zirconium yellow, and chrome iron brown.

[0010] A second aspect of the present invention provides a ceramic tile comprising a base layer and a glaze layer located above the base layer; the glaze layer is made of the aforementioned high-proportion albite glaze.

[0011] In the aforementioned ceramic tile, the thickness of the glaze layer is 0.5mm to 0.7mm.

[0012] A third aspect of the present invention provides a method for preparing ceramic tiles, comprising the following steps: S10. The raw materials of high-proportion sodium feldspar glaze are put into a ball mill according to the formula, mixed with water and ball milled to obtain glaze slurry; S20. Apply the glaze slurry to the base layer and dry it to form a glaze layer; S30. The base layer with the glaze layer is fired to obtain the ceramic tile.

[0013] In the method for preparing ceramic tiles, in step S10, the glaze slurry is processed through a 325-mesh sieve, and the specific gravity of the glaze slurry is 1.4 g / cm³. 3 ~1.45g / cm 3 .

[0014] In the method for preparing ceramic tiles, the firing process in step S30 includes heating the ceramic tile to 800°C at a heating rate of 3°C / min after it enters the kiln, holding it at that temperature for 10 minutes; then heating it to 1150°C at a heating rate of 2°C / min, holding it at that temperature for 15 minutes, and then allowing it to cool naturally.

[0015] Beneficial effects: The first aspect of this invention provides a high-proportion albite glaze. By increasing the proportion of albite in the glaze, the firing temperature can be significantly reduced, the holding time shortened, and energy consumption reduced. Furthermore, the high proportion of albite effectively promotes stable gas escape during firing, thereby significantly reducing defects such as pinholes, bubbles, and orange peel texture, and improving the smoothness and gloss of the glaze surface. In addition, through the synergistic effect of the high proportion of albite with calcite and zinc oxide, the high-temperature melting characteristics and crystallization behavior of the glaze can be synergistically controlled. Without using excessive high-cost opacifiers, the opacification effect and white texture of the glaze can be improved at a lower cost, resulting in a uniform and soft glaze color.

[0016] The second aspect of the present invention provides a ceramic tile with a smooth and flat glaze, a gloss level of 90° or higher, uniform and stable opacity, no obvious pinholes or bubbles on the glaze, excellent wear and scratch resistance, and can be used stably, safely and reliably for a long time in various high-frequency use and high decoration requirements indoor and outdoor scenarios such as home living rooms, kitchens and bathrooms, commercial stores, and public corridors.

[0017] The third aspect of this invention provides a method for preparing ceramic tiles. By adopting a firing curve with stepped heating and appropriate heat preservation, the melting characteristics of albite can be fully utilized, allowing the glaze layer to release gas more gradually and for a longer period during the firing process. This reduces defects such as pinholes and glaze shrinkage, and forms a glaze surface with high flatness and high gloss. Attached Figure Description

[0018] Figure 1 This is a flowchart of the ceramic tile preparation method provided by the present invention.

[0019] Figure 2 This is a physical image of the ceramic tile provided in Example 1.

[0020] Figure 3 The image shown is of the actual tile provided in Scale 1. Detailed Implementation

[0021] This invention provides a high-proportion sodium feldspar glaze, ceramic tiles, and a method for preparing ceramic tiles. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0022] The first aspect of the present invention provides a high-proportion albite glaze, the raw materials for which are prepared by weight include: 30-60 parts albite, 10-15 parts potassium feldspar, 10-30 parts quartz, 5-20 parts clay minerals, 5-15 parts calcite, 5-15 parts talc, 3-5 parts zinc oxide, and 2-5 parts zirconium silicate.

[0023] In the aforementioned high-proportion sodium feldspar glaze, both potassium feldspar and sodium feldspar act as fluxes, lowering the glaze's melting temperature, promoting glass phase formation, and improving glaze fluidity. Compared to traditional glazes using potassium feldspar as the primary flux, this high-proportion sodium feldspar glaze, by increasing the amount of sodium feldspar, leverages its properties to further lower the glaze's initial melting temperature, broaden its melting range, and increase surface tension. This allows for a smoother and more sustained gas release during firing, providing a longer window for bubbles to escape from the glaze layer, thus effectively reducing defects such as pinholes. Furthermore, by increasing the proportion of sodium feldspar in the glaze, the glaze melt exhibits better high-temperature fluidity and spreadability, resulting in a smoother, more glossy glaze surface.

[0024] In the high-proportion sodium feldspar glaze, quartz, as a glass network forging body, can provide a SiO2 framework, increase the hardness of the glaze layer, and the high proportion of sodium feldspar and quartz can work together to regulate the expansion coefficient of the glaze, so that the glaze layer and the body can be better bonded, thereby reducing the occurrence of glaze layer cracking.

[0025] In the high-proportion sodium feldspar glaze, the introduction of talc components to supplement the MgO content in the glaze can effectively broaden the firing temperature range of the glaze, improve the high-temperature liquid phase viscosity stability, enhance the opaque effect and white texture of the glaze surface, and improve the hardness, wear resistance and scratch resistance of the glaze surface.

[0026] In the aforementioned high-proportion albite glaze, calcite and zinc oxide are combined with a high proportion of albite to synergistically regulate the high-temperature melting characteristics and crystallization behavior of the glaze. This results in a uniform and dense glaze layer with a suitable firing temperature, allowing for the precipitation of finer, more evenly distributed microcrystalline phases and the construction of a continuous, dense, and less defective glassy matrix. Therefore, relying on the light scattering and refraction effects brought about by the formed special microstructure, the opacity and whiteness of the glaze can be significantly improved without using excessive high-cost opacifiers. This results in a uniform and soft glaze color, effectively improving the glaze's color development and hiding power, thereby reducing raw material costs and enhancing the appearance quality of ceramic tile products.

[0027] To further reduce the amount of high-cost opacifiers used and enhance the opaque, white texture of the glaze, In a preferred embodiment, the raw materials for preparing the high-proportion albite glaze, by weight, further include 8-10 parts of boron-titanium-phosphorus frit. The boron-titanium-phosphorus frit, with B2O3 as a strong fluxing component, P2O5 as a nucleation-inducing component, and TiO2 as a microemulsification-enhancing component, forms a highly efficient synergistic effect with the albite, calcite, and zinc oxide in the glaze. Specifically, B2O3 can further reduce the high-temperature viscosity and firing temperature of the glaze, promote full melting and rapid degassing, and significantly reduce pinholes and bubble defects on the glaze surface; P2O5 can induce the formation of microcrystals in the glaze layer, enhance the light scattering effect, and improve the opacity covering power. This optimizes the size and distribution of microcrystals, thereby improving the whiteness of the glaze surface.

[0028] Specifically, the boron-titanium-phosphorus frit, by mass percentage, may contain the following chemical composition: SiO2: 48.5%–49.0%, Al2O3: 7.7%–8.0%, B2O3: 10.0%–10.3%, CaO: 6.8%–7.1%, MgO: 1.3%–1.5%, Na2O: 7.6%–7.9%, P2O5: 5.6%–5.9%, TiO2: 2.4%–2.7%, CaF2: 4.1%–4.3%, with the balance being loss on ignition. In this boron-titanium-phosphorus frit, the combination of CaF2 and TiO2 optimizes the crystallite size and distribution, reducing the amount of opacifiers such as zirconium silicate while ensuring the whiteness and uniformity of the glaze. Furthermore, the presence of Na2O, CaO, and MgO in this boron-titanium-phosphorus frit stabilizes the glaze's coefficient of thermal expansion, improves the adhesion between the body and glaze, and enhances the density and physicochemical properties of the glaze surface.

[0029] In the high-proportion albite glaze, clay minerals can improve the suspension stability and thixotropic properties of the glaze slurry, prevent the glaze components from settling and stratifying, and ensure the uniformity of glazing. Secondly, clay minerals can enhance the adhesion strength of the glaze to the surface of the body, reducing defects such as glaze flow and glaze peeling during the glazing process. Furthermore, clay minerals participate in the melting reaction of the glaze during high-temperature firing, regulating the high-temperature viscosity and fluidity of the glaze, inhibiting excessive glaze flow, and helping to form a dense and uniform glaze layer structure, improving the smoothness and gloss of the glaze surface. For example, the clay minerals can be at least one of kaolinite and spherical clay.

[0030] The high-proportion sodium feldspar glaze provided by this invention is applicable to products such as tile mosaics and ceramic tiles. Therefore, to enrich the surface color of these ceramic tile products, in a preferred embodiment, the high-proportion sodium feldspar glaze further includes 0-1 parts of inorganic pigment; the inorganic pigment is at least one selected from cobalt iron black, cobalt blue, chrome green, zirconium iron red, praseodymium zirconium yellow, and chrome iron brown. The inorganic pigments described above have excellent high-temperature resistance and good compatibility with the glaze system. They can be uniformly dispersed in the glaze layer under low-temperature firing conditions, and are not prone to problems such as agglomeration, uneven color development, or high-temperature decomposition, thus stably presenting a pure and vibrant color effect. At the same time, the amount of inorganic pigment added is controlled within a reasonable range, and will not adversely affect the melting performance, opacity effect, or body-glaze bonding stability of the glaze. This can meet the diverse decorative needs of tile mosaics and ceramic tiles, while ensuring stable and reliable glaze quality. Of course, the types of inorganic pigments are not limited to those listed above.

[0031] A second aspect of this invention provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made of a high-proportion sodium feldspar glaze. This ceramic tile has a smooth and even glaze surface with a gloss level of 90° or higher, uniform and stable opacity, no obvious pinholes or bubbles, and excellent wear and scratch resistance. It can be used stably, safely, and reliably for long-term application in various high-frequency use and high-decoration-requirement indoor and outdoor scenarios such as home living rooms, kitchens and bathrooms, commercial stores, and public corridors.

[0032] In order to ensure that the glaze can fully cover the base color, impurities and color difference of the body, and guarantee the opacity and whiteness of the glaze surface, while also facilitating the smooth degassing and full melting and leveling of the glaze during the firing process, thereby effectively reducing defects such as pinholes, bubbles, glaze shrinkage and ripples, in a preferred embodiment, the thickness of the glaze layer is 0.5mm to 0.7mm.

[0033] like Figure 1 As shown, the third aspect of the present invention provides a method for preparing ceramic tiles, which includes the following steps: S10. The raw materials of high-proportion sodium feldspar glaze are put into a ball mill according to the formula, and mixed with water and sodium tripolyphosphate (dispersant) to obtain glaze slurry. The mixing and ball milling time is 4 hours. S20. Apply the glaze slurry to the base layer and dry it to form a glaze layer; S30. The base layer with the glaze layer is fired to obtain the ceramic tile.

[0034] In order to filter out coarse particles, lumps and impurities in the glaze slurry, make the glaze slurry fine and uniform in texture, and avoid defects such as pinholes, pits and glaze shrinkage on the glaze surface after firing, the glaze slurry is treated with a 325 mesh sieve in step S10.

[0035] To ensure the glaze slurry possesses suitable fluidity, suspension, and adhesion, and to control the thickness of the glaze layer, in step S10, the specific gravity of the glaze slurry is 1.4 g / cm³. 3 ~1.45g / cm 3 .

[0036] In the method for preparing ceramic tiles, the firing process in step S30 includes heating the ceramic tile to 800°C at a heating rate of 3°C / min after it enters the kiln, holding it at that temperature for 10 minutes; then heating it to 1150°C at a heating rate of 2°C / min, holding it at that temperature for 15 minutes, and then allowing it to cool naturally.

[0037] By employing a firing curve with stepped heating and appropriate heat preservation, the melting characteristics of albite can be fully utilized, allowing for a more gradual and sustained release of gas within the glaze layer during firing. This reduces defects such as pinholes and glaze shrinkage, resulting in a glaze surface with high smoothness and gloss. Furthermore, using a firing curve with stepped heating and appropriate heat preservation ensures that the thermal expansion of the body and glaze layer is more consistent, reducing glaze cracking, peeling, and crazing.

[0038] Specifically, heating to 800℃ at a rate of 3℃ / min first allows for the slow removal of moisture from the base layer, preventing rapid vaporization that could lead to cracks in the body and defects such as pinholes and bubbles on the glaze. Furthermore, the slow heating reduces drastic shrinkage of the glaze layer, avoiding glaze shrinkage and glaze surface ripples.

[0039] The present invention will be further illustrated by the following examples and comparative examples.

[0040] Example 1 This embodiment provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts of sodium feldspar, 12 parts of potassium feldspar, 25 parts of quartz, 15 parts of kaolin, 10 parts of calcite, 8 parts of talc, 5 parts of zinc oxide, and 5 parts of zirconium silicate.

[0041] This embodiment also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this embodiment. The thickness of the glaze layer is 0.5 mm.

[0042] This embodiment also provides a method for preparing ceramic tiles, including the following steps; S10. The raw materials of high-proportion sodium feldspar glaze are put into a ball mill according to the formula, and mixed with water and sodium tripolyphosphate (dispersant) to obtain glaze slurry. The mixing and ball milling time is 4 hours. S20. Apply the glaze slurry to the base layer and dry it to form a glaze layer; S30. The base layer with the glaze layer is fired to obtain the ceramic tile.

[0043] In order to filter out coarse particles, lumps and impurities in the glaze slurry, make the glaze slurry fine and uniform in texture, and avoid defects such as pinholes, pits and glaze shrinkage on the glaze surface after firing, the glaze slurry is treated with a 325 mesh sieve in step S10.

[0044] To ensure the glaze slurry possesses suitable fluidity, suspension, and adhesion, and to control the thickness of the glaze layer, in step S10, the specific gravity of the glaze slurry is 1.45 g / cm³. 3 .

[0045] In the method for preparing ceramic tiles, the firing process in step S30 includes heating the ceramic tile to 800°C at a heating rate of 3°C / min after it enters the kiln, holding it at that temperature for 10 minutes; then heating it to 1150°C at a heating rate of 2°C / min, holding it at that temperature for 15 minutes, and then allowing it to cool naturally.

[0046] Example 2 This embodiment provides a high-proportion albite glaze, the raw materials for which, by weight, include: 30 parts sodium feldspar, 10 parts potassium feldspar, 10 parts quartz, 5 parts kaolin, 5 parts calcite, 5 parts talc, 3 parts zinc oxide, and 4 parts zirconium silicate.

[0047] This embodiment also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this embodiment. The thickness of the glaze layer is 0.5 mm.

[0048] This embodiment also provides a method for preparing ceramic tiles, which is the same as the method provided in Embodiment 1.

[0049] Example 3 This embodiment provides a high-proportion albite glaze, the raw materials for which, by weight, include: 60 parts sodium feldspar, 15 parts potassium feldspar, 30 parts quartz, 20 parts kaolin, 15 parts calcite, 15 parts talc, 5 parts zinc oxide, and 5 parts zirconium silicate.

[0050] This embodiment also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this embodiment. The thickness of the glaze layer is 0.5 mm.

[0051] This embodiment also provides a method for preparing ceramic tiles, which is the same as the method provided in Embodiment 1.

[0052] Example 4 This embodiment provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts of sodium feldspar, 12 parts of potassium feldspar, 25 parts of quartz, 15 parts of kaolin, 10 parts of calcite, 8 parts of talc, 5 parts of zinc oxide, 2 parts of zirconium silicate, and 10 parts of boron-titanium-phosphorus frit.

[0053] The boron-titanium-phosphorus frit, by mass percentage, has the following chemical composition: SiO2: 48.70%, Al2O3: 7.85%, B2O3: 10.15%, CaO: 6.95%, MgO: 1.40%, Na2O: 7.75%, P2O5: 5.75%, TiO2: 2.55%, CaF2: 4.2%, with the balance being loss on ignition.

[0054] This embodiment also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this embodiment. The thickness of the glaze layer is 0.5 mm.

[0055] This embodiment also provides a method for preparing ceramic tiles, which is the same as the method provided in Embodiment 1.

[0056] Comparative Example 1 This comparative example provides a glaze whose raw materials, by weight, include: 10 parts sodium feldspar, 40 parts potassium feldspar, 25 parts quartz, 15 parts kaolin, 10 parts calcite, 8 parts talc, 5 parts zinc oxide, and 5 parts zirconium silicate.

[0057] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from the glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0058] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0059] Comparative Example 2 This comparative example provides a high-proportion albite glaze, the raw materials for which, by weight, include: 25 parts sodium feldspar, 10 parts potassium feldspar, 25 parts quartz, 15 parts kaolin, 10 parts calcite, 8 parts talc, 5 parts zinc oxide, and 5 parts zirconium silicate.

[0060] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0061] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0062] Comparative Example 3 This comparative example provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts of sodium feldspar, 12 parts of potassium feldspar, 25 parts of quartz, 15 parts of kaolin, 10 parts of calcite, 8 parts of talc, 1.5 parts of zinc oxide, and 5 parts of zirconium silicate.

[0063] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0064] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0065] Comparative Example 4 This comparative example provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts of sodium feldspar, 12 parts of potassium feldspar, 25 parts of quartz, 15 parts of kaolin, 3.5 parts of calcite, 8 parts of talc, 5 parts of zinc oxide, and 5 parts of zirconium silicate.

[0066] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0067] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0068] Comparative Example 5 This comparative example provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts of sodium feldspar, 12 parts of potassium feldspar, 25 parts of quartz, 15 parts of kaolin, 12 parts of calcite, 8 parts of talc, and 5 parts of zirconium silicate.

[0069] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0070] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0071] Comparative Example 6 This comparative example provides a high-proportion albite glaze, the raw materials for which, by weight, include: 45 parts sodium feldspar, 12 parts potassium feldspar, 25 parts quartz, 15 parts kaolin, 10 parts calcite, 8 parts talc, 5 parts zinc oxide, and 2 parts zirconium silicate.

[0072] This comparative example also provides a ceramic tile, comprising a base layer and a glaze layer above the base layer; the glaze layer is made from a high-proportion albite glaze provided in this comparative example. The thickness of the glaze layer is 0.5 mm.

[0073] This comparative example also provides a method for preparing ceramic tiles, which is the same as the method provided in Example 1.

[0074] The gloss (60° mirror gloss) and glaze abrasion resistance of the ceramic tiles provided in the above embodiments and comparative examples were tested; the opaque effect of the glaze and the presence of pinholes and bubbles were also observed. The glaze abrasion resistance test was conducted according to the standard GB / T 4100-2015 "Ceramic Tiles", and the test and observation results are shown in Table 1 below.

[0075] Table 1

[0076] As can be seen from the test data in Table 1 above, the ceramic tiles provided in Examples 1 to 4 have high gloss, good opacity, and no obvious pinholes or bubbles on the glaze surface, and have good wear resistance. This indicates that the high proportion of sodium feldspar glaze provided by the present invention has significant advantages in solving glaze defects and adjusting glaze performance.

[0077] Furthermore, comparing the ceramic tile provided in Example 4 with the ceramic tiles provided in Examples 1-3, the ceramic tile provided in Example 4 still has a smooth and white glaze even with a reduced amount of zirconium silicate. This indicates that the introduction of boron-titanium-phosphorus frit into a high proportion of sodium feldspar glaze can replace part of the zirconium silicate and reduce the amount of high-cost opacifier.

[0078] Furthermore, a comparison between Comparative Example 1 and Example 1 revealed that the ceramic tile glaze provided in Comparative Example 1 exhibited obvious pinholes (see...). Figure 3 The red box illustrates the significant shortcomings of traditional glazes using potassium feldspar as the main flux in addressing pinholes and improving the physical and chemical properties of the glaze surface.

[0079] Furthermore, comparing Comparative Example 2 with Example 1, it was found that the ceramic tile glaze provided by Comparative Example 2 had a small number of pinholes. This is because the amount of albite in the glaze used in Comparative Example 2 was lower than the reasonable range, and the glaze's fluxing and degassing effects were not sufficiently improved.

[0080] Furthermore, a comparison was made between Comparative Example 3 and Example 1. It was found that the glaze of the ceramic tile provided by Comparative Example 3 had a generally poor opacity effect and some pinholes. This was because the amount of zinc oxide added to the glaze used in Comparative Example 3 was insufficient, and it could not work synergistically with sodium feldspar and calcite to regulate high-temperature melting and crystallization.

[0081] Furthermore, a comparison was made between Comparative Example 4 and Example 1. It was found that the ceramic tile glaze provided by Comparative Example 4 had poor opacity and obvious pinholes. This was because the amount of calcite in the glaze used in Comparative Example 4 was insufficient, resulting in incomplete melting of the glaze and the inability of gas to escape smoothly during the high-temperature firing process.

[0082] Furthermore, a comparison between Comparative Example 5 and Example 1 revealed that the glaze of the ceramic tile provided by Comparative Example 5 had a generally poor opacity effect and a small number of pinholes. This was because zinc oxide was not introduced into the glaze used in Comparative Example 5, resulting in an imbalance between the high-temperature fluidity and crystallization control of the glaze.

[0083] Furthermore, a comparison was made between Comparative Example 6 and Example 4. It was found that the opacity effect of the ceramic tile glaze provided by Comparative Example 6 was generally poor. This is because the amount of zirconium silicate added in the glaze used in Comparative Example 6 was lower than that in Example 1, but boron-titanium-phosphorus flocculants were not added to the glaze. This further illustrates that the introduction of boron-titanium-phosphorus flocculants into a high proportion of sodium feldspar glaze can replace part of the zirconium silicate and improve the opacity effect of the glaze.

[0084] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.

Claims

1. A high-proportion sodium feldspar glaze, characterized in that, The raw materials for its preparation, by weight, include: 30-60 parts of sodium feldspar, 10-15 parts of potassium feldspar, 10-30 parts of quartz, 5-20 parts of clay minerals, 5-15 parts of calcite, 5-15 parts of talc, 3-5 parts of zinc oxide, and 2-5 parts of zirconium silicate.

2. The high-proportion albite glaze according to claim 1, characterized in that, The raw materials for its preparation, by weight, also include: 8 to 10 parts of boron-titanium-phosphorus frit.

3. The high-proportion albite glaze according to claim 2, characterized in that, The boron-titanium-phosphorus frit, by mass percentage, comprises the following chemical composition: SiO2: 48.5%–49.0%, Al2O3: 7.7%–8.0%, B2O3: 10.0%–10.3%, CaO: 6.8%–7.1%, MgO: 1.3%–1.5%, Na2O: 7.6%–7.9%, P2O5: 5.6%–5.9%, TiO2: 2.4%–2.7%, CaF2: 4.1%–4.3%, with the balance being loss on ignition.

4. The high-proportion albite glaze according to claim 1, characterized in that, The clay mineral is at least one of kaolinite and spherical clay.

5. The high-proportion albite glaze according to claim 1, characterized in that, The raw materials for its preparation, by weight, also include: 0 to 1 part of inorganic pigment; wherein the inorganic pigment is at least one of cobalt iron black, cobalt blue, chrome green, zirconium iron red, praseodymium zirconium yellow, and chrome iron brown.

6. A type of ceramic tile, characterized in that, It includes a base layer and a glaze layer located above the base layer; the glaze layer is made from a high proportion of albite glaze as described in any one of claims 1-5.

7. The ceramic tile according to claim 6, characterized in that, The thickness of the glaze layer is 0.5 mm to 0.7 mm.

8. A method for preparing ceramic tiles, characterized in that, The method for preparing the ceramic tile according to any one of claims 6-7 comprises the following steps: S10. The raw materials of high-proportion sodium feldspar glaze are put into a ball mill according to the formula, mixed with water and ball milled to obtain glaze slurry; S20. Apply the glaze slurry to the base layer and dry it to form a glaze layer. S30. The base layer with the glaze layer is fired to obtain the ceramic tile.

9. The method for preparing ceramic tiles according to claim 8, characterized in that, In step S10, the glaze slurry is processed through a 325-mesh sieve, and the specific gravity of the glaze slurry is 1.4 g / cm³. 3 ~1.45g / cm 3 .

10. The method for preparing ceramic tiles according to claim 8, characterized in that, In step S30, the firing process includes heating the furnace to 800°C at a rate of 3°C / min after it enters the kiln, holding the temperature for 10 min; then heating the furnace to 1150°C at a rate of 2°C / min, holding the temperature for 15 min, and then allowing it to cool naturally.

Images