Soda-lime glass, preparation method therefor and use thereof

Abstract

Provided in the present application are a soda-lime glass, a preparation method therefor and the use thereof. Components of the soda-lime glass comprise: SiO2, Na2O, CaO, B2O3, ZnO and K2O. On the basis of the total mass of the soda-lime glass, the mass percentage of B2O3 is 3-7%, the mass percentage of Na2O is 6%-14%, and the mass percentage of ZnO is 1.5%-5%. The coefficient of thermal expansion of the soda-lime glass ranges from 6.5×10-6 / ℃ to 8×10-6 / ℃.

Description

Soda-lime glass, preparation method and application thereof

[0001] Cross-reference to related applications

[0002] The present disclosure is based on and claims priority to Chinese Patent Application No. 202410739904.X, filed on June 7, 2024, entitled "Soda-lime glass, preparation method and application thereof", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of glass materials, in particular to a soda-lime glass, a preparation method and application thereof. BACKGROUND

[0004] In the process of making glass products with special-shaped structures, two or more glass parts with different shapes often need to be bonded and fused. In order to pursue the appearance and function diversification of glass devices, glass parts with different materials are often bonded and fused. Alumina-silica glass, due to its high transparency and good temperature resistance, has become one of the main glass materials for making glass products with special-shaped structures.

[0005] However, when alumina-silica glass and other glass materials are used to prepare glass devices with special-shaped structures, whether directly fused or with low-temperature fluxing glass powder, the glass is prone to be cracked. Especially when making glass products with special-shaped structures with hollow structures, since the melting temperature of alumina-silica glass is relatively high, the melting requirement is extremely high, and generally a glass material with a relatively low melting temperature is used to prepare the hollow part. However, when the traditional glass material with a relatively low melting temperature is fused with alumina-silica glass, the difference in deformation is large, and the glass is prone to be cracked or extruded.

[0006] Therefore, the traditional technology still needs to be improved. SUMMARY

[0007] Based on this, the present application provides a soda-lime glass, a preparation method and application thereof. The soda-lime glass can maintain a relatively low difference in deformation when fused with alumina-silica glass material, thereby improving the fusion quality.

[0008] The technical solution of the present application is as follows.

[0009] In a first aspect, the present application provides a soda-lime glass, the components of the soda-lime glass comprising: SiO2, Na2O, CaO, B2O3, ZnO and K2O, the mass percentage of B2O3 being 3% to 7% according to the total mass of the soda-lime glass; the mass percentage of Na2O being 6% to 14%, and the mass percentage of ZnO being 1.5% to 5%; the thermal expansion coefficient of the soda-lime glass being 6.5x10-6 / ℃ to 7.5x10-6 / ℃.-6 / ℃~8×10 -6 / ℃.

[0010] In the sodium-calcium glass, by adjusting the components of the sodium-calcium glass, the thermal expansion coefficient of the sodium-calcium glass is controlled to be close to the thermal expansion coefficient of the traditional aluminum-silicon glass (6.5×10 -6 / ℃~8×10 -6 / ℃), and when the sodium-calcium glass is fused with the aluminum-silicon glass, the difference in deformation can be kept low, the fusion quality is improved, and the bonding interface is smoother.

[0011] In some embodiments, the mass percentage of B2O3 is 3% to 6%, the mass percentage of Na2O is 6% to 11%, and the mass percentage of ZnO is 1.5% to 3%, based on the total mass of the sodium-calcium glass.

[0012] In some embodiments, the components of the sodium-calcium glass include 60% to 80% SiO2, 6% to 14% Na2O, 4% to 12% CaO, 3% to 7% B2O3, 0 to 2% Al2O3, 1.5% to 5% ZnO, and 1% to 2% K2O, based on the total mass of the sodium-calcium glass.

[0013] In some embodiments, the components of the sodium-calcium glass include 70% to 80% SiO2, 6% to 11% Na2O, 4% to 8% CaO, 3% to 6% B2O3, 0 to 1% Al2O3, 1.5% to 3% ZnO, and 1% to 2% K2O, based on the total mass of the sodium-calcium glass.

[0014] In the sodium-calcium glass, by adjusting the components of the sodium-calcium glass, the thermal expansion coefficient of the sodium-calcium glass is controlled to be close to the thermal expansion coefficient of the traditional aluminum-silicon glass (6.5×10

[0015] In addition, when the glass product is prepared by using the sodium-calcium glass, the melting temperature is low, the requirements for the melting container are reduced, and the melting can be performed by using a commonly used mullite crucible.

[0016] In a second aspect, the application provides a preparation method of the sodium-calcium glass of the first aspect, including the following steps:

[0017] The sodium-calcium glass is obtained by providing raw materials, mixing the raw materials, and sequentially performing a melting process and a forming process, wherein the raw materials are provided by providing SiO2 or a precursor thereof, Na2O or a precursor thereof, CaO or a precursor thereof, B2O3 or a precursor thereof, ZnO or a precursor thereof, and K2O or a precursor thereof, and wherein the mass percentage of the B2O3 or the precursor thereof is 3% to 7%, the mass percentage of the Na2O or the precursor thereof is 6% to 14%, and the mass percentage of the ZnO or the precursor thereof is 1.5% to 5%, based on the total mass of the raw materials.

[0018] By the specific mass ratio, the sodium-calcium glass material with a thermal expansion coefficient similar to that of the traditional aluminum-silicon glass can be obtained, and when the sodium-calcium glass is fused with the aluminum-silicon glass, the difference in deformation can be kept low, the fusion quality can be improved, and the bonding interface can be smoother.

[0019] In some embodiments, the mass percentage of the B2O3 or the precursor thereof is 3% to 6%, the mass percentage of the Na2O or the precursor thereof is 6% to 11%, and the mass percentage of the ZnO or the precursor thereof is 1.5% to 3%, based on the total mass of the raw materials.

[0020] In some embodiments, the raw materials are provided by providing 60% to 80% of the SiO2 or the precursor thereof, 6% to 14% of the Na2O or the precursor thereof, 4% to 12% of the CaO or the precursor thereof, 3% to 7% of the B2O3 or the precursor thereof, 0 to 2% of Al2O3 or the precursor thereof, 1.5% to 5% of the ZnO or the precursor thereof, and 1% to 2% of the K2O or the precursor thereof, based on the total mass of the raw materials.

[0021] In some embodiments, the raw materials are provided by providing 70% to 80% of the SiO2 or the precursor thereof, 6% to 11% of the Na2O or the precursor thereof, 4% to 8% of the CaO or the precursor thereof, 3% to 6% of the B2O3 or the precursor thereof, 0 to 1% of Al2O3 or the precursor thereof, 1.5% to 3% of the ZnO or the precursor thereof, and 1% to 2% of the K2O or the precursor thereof, based on the total mass of the raw materials.

[0022] In some embodiments, the melting process is performed at a temperature of 1200°C to 1450°C for 6 hours to 24 hours.

[0023] In some embodiments, after the step of the forming process, the method further comprises the following steps:

[0024] The product obtained through the forming treatment is subjected to annealing treatment; the annealing treatment is performed at a temperature of 550-650 DEG C for 2-10 hours.

[0025] In a third aspect, the present application provides a glass product, which comprises the soda-lime glass of the first aspect or the soda-lime glass prepared by the method of the second aspect.

[0026] In some embodiments, the glass product comprises a first glass part and a second glass part which are fused to each other, the first glass part comprises the soda-lime glass, and the second glass part comprises an alumino-silicate glass.

[0027] In some embodiments, the first glass part has a hollow structure.

[0028] In some embodiments, the alumino-silicate glass has a coefficient of thermal expansion of 6.5x10 -6 / ℃ to 8x10 -6 / ℃ at 0-300 DEG C. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application will be given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] 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 application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0032] "Ranges" disclosed herein are of the form of from a lower limit to an upper limit, a given range is defined by selecting a lower limit and an upper limit, the selected lower limit and upper limit define the boundaries of a particular range. Ranges defined in this manner can be inclusive or exclusive of the end values, either end value can be independently inclusive or exclusive, and can be arbitrarily combined, i.e., any lower limit can be combined with any upper limit to form a range. For example, if ranges of 60-120 and 80-110 are listed for a particular parameter, it is understood that ranges of 60-110 and 80-120 are also contemplated. Further, if minimum range values of 1 and 2 are listed, and if maximum range values of 3, 4, and 5 are also listed, then the following ranges are all contemplated: 1-3, 1-4, 1-5, 2-3, 2-4, and 2-5. In this application, unless otherwise indicated, a numerical range "a-b" means a range of any combination of the numbers a and b, wherein a and b are both real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" have been listed herein, "0-5" is merely a shorthand for listing all of the numbers in that range. Also, when a parameter is stated to be an integer ≥ 2, it is equivalent to listing the parameter as, for example, integer 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc. For example, when a parameter is stated to be an integer selected from "2-10", it is equivalent to listing the integers 2, 3, 4, 5, 6, 7, 8, 9, and 10.

[0033] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combinable with other embodiments.

[0034] In this application, "room temperature" generally refers to 4°C to 30°C, preferably 20±5°C, unless otherwise specified.

[0035] The embodiment of the application provides a soda-lime glass, the components of the soda-lime glass include: SiO2, Na2O, CaO, B2O3, ZnO and K2O, the mass percentage of the B2O3 is 3% to 7% according to the total mass of the soda-lime glass; the mass percentage of the Na2O is 6% to 14%, and the mass percentage of the ZnO is 1.5% to 5%.

[0036] The coefficient of thermal expansion of the soda-lime glass is 6.5*10 -6 / ℃ to 8*10 -6 / ℃.

[0037] The coefficient of thermal expansion of the soda-lime glass is similar to that of the traditional aluminum-silicon glass (6.5*10 -6 / ℃~8*10 -6 / ℃), and the difference in deformation is low when the soda-lime glass is fused with the aluminum-silicon glass, so that the fusion quality is improved and the bonding interface is smoother.

[0038] It should be noted that the coefficient of thermal expansion refers to the coefficient of thermal expansion obtained at 0~300℃.

[0039] In some embodiments, the components of the soda-lime glass further include Al2O3. That is, the components of the soda-lime glass include SiO2, Na2O, CaO, B2O3, ZnO, K2O and Al2O3, or the components of the soda-lime glass are SiO2, Na2O, CaO, B2O3, ZnO, K2O and Al2O3.

[0040] In some embodiments, the mass percentage of B2O3 is 3%~6%, the mass percentage of Na2O is 6%~11%, and the mass percentage of ZnO is 1.5%~3%, according to the total mass of the soda-lime glass.

[0041] In some embodiments, the components of the soda-lime glass include 60%~80% SiO2, 6%~14% Na2O, 4%~12% CaO, 3%~7% B2O3, 0~2% Al2O3, 1.5%~5% ZnO and 1%~2% K2O, according to the total mass of the soda-lime glass.

[0042] The soda-lime glass has a coefficient of thermal expansion similar to that of the traditional aluminum-silicon glass (6.5*10 -6 / ℃~8*10 -6 / ℃, 0~300℃), and the difference in deformation is low when the soda-lime glass is fused with the aluminum-silicon glass, so that the fusion quality is improved and the bonding interface is smoother.

[0043] In addition, when the glass product is prepared by using the soda-lime glass, the melting temperature is low, the requirements for the melting container are reduced, and the melting can be performed by using a commonly used mullite crucible.

[0044] In some embodiments, the mass percentage of Al2O3 is 0~1%.

[0045] Further reducing the mass percentage of Al2O3 can further reduce the viscosity of the soda-lime glass during melting without negatively affecting the coefficient of thermal expansion of the glass, which is conducive to reducing the fusion temperature when the soda-lime glass is fused with the aluminum-silicon glass.

[0046] In some embodiments, the components of the soda-lime glass include, in terms of the total mass of the soda-lime glass: 70-80% SiO2, 6-11% Na2O, 4-8% CaO, 3-6% B2O3, 0-1% Al2O3, 1.5-3% ZnO, and 1-2% K2O.

[0047] In the above "60-80%", the mass percentage of SiO2 includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%; or a range composed of any two numerical values.

[0048] In the above "6-14%", the mass percentage of Na2O includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%; or a range composed of any two numerical values.

[0049] In the above "4-12%", the mass percentage of CaO includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%; or a range composed of any two numerical values.

[0050] In the above "3-7%", the mass percentage of B2O3 includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 3%, 4%, 5%, 6%, or 7%; or a range composed of any two numerical values.

[0051] In the above "0-2%", the mass percentage of Al2O3 includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 0%, 1%, 1.5%, or 2%; or a range composed of any two numerical values.

[0052] In the above "1.5% to 5%", the mass percentage of ZnO includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%; or a range composed of any two numerical values.

[0053] In the above "1% to 2%", the mass percentage of K2O includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and specific examples include but are not limited to the point values in the embodiments and the following point values: 1%, 1.5%, or 2%; or a range composed of any two numerical values.

[0054] Embodiments of the present application provide a preparation method of the above-mentioned soda-lime glass, including the following step S10.

[0055] Step S10: raw materials are provided according to the components of the above-mentioned soda-lime glass, the raw materials are mixed and sequentially subjected to melting treatment and forming treatment to obtain the soda-lime glass, wherein the raw materials include SiO2 or a precursor thereof, Na2O or a precursor thereof, CaO or a precursor thereof, B2O3 or a precursor thereof, ZnO or a precursor thereof, and K2O or a precursor thereof, wherein the mass percentage of the B2O3 or the precursor thereof is 3% to 7% according to the total mass of the raw materials in the form of oxides; the mass percentage of the Na2O or the precursor thereof is 6% to 14%, and the mass percentage of the ZnO or the precursor thereof is 1.5% to 5%.

[0056] In the above method, by adjusting the components of the soda-lime glass, the coefficient of thermal expansion of the soda-lime glass is controlled to be close to the coefficient of thermal expansion of the traditional aluminum-silicon glass (6.5x10 -6 / ℃ to 8x10 -6 / ℃), and when the soda-lime glass is fused with the aluminum-silicon glass, the difference in deformation can be kept low, the fusion quality is improved, and the bonding interface is smoother.

[0057] In some embodiments, the mass percentage of the B2O3 or the precursor thereof is 3% to 6% according to the total mass of the raw materials in the form of oxides; the mass percentage of the Na2O or the precursor thereof is 6% to 11%, and the mass percentage of the ZnO or the precursor thereof is 1.5% to 3%.

[0058] In some embodiments, the providing raw materials includes providing, in terms of oxides and based on the total mass of the raw materials, 60% to 80% of SiO2 or a precursor thereof, 6% to 14% of Na2O or a precursor thereof, 4% to 12% of CaO or a precursor thereof, 3% to 7% of B2O3 or a precursor thereof, 0 to 2% of Al2O3 or a precursor thereof, 1.5% to 5% of ZnO or a precursor thereof, and 1% to 2% of K2O or a precursor thereof.

[0059] In some embodiments, the providing raw materials includes providing, in terms of oxides and based on the total mass of the raw materials, 70% to 80% of SiO2 or a precursor thereof, 6% to 11% of Na2O or a precursor thereof, 4% to 8% of CaO or a precursor thereof, 3% to 6% of B2O3 or a precursor thereof, 0 to 1% of Al2O3 or a precursor thereof, 1.5% to 3% of ZnO or a precursor thereof, and 1% to 2% of K2O or a precursor thereof.

[0060] In the above method, by virtue of the specific mass ratio, a sodium-calcium glass material having a thermal expansion coefficient similar to that of a conventional aluminum-silicon glass can be obtained, and when the sodium-calcium glass material is fused with the aluminum-silicon glass, a lower difference in deformation can be maintained, the fusion quality can be improved, and the bonding interface can be smoother.

[0061] It should be noted that the raw materials can be oxides directly providing the components of the sodium-calcium glass, for example, SiO2, Na2O, CaO, B2O3, Al2O3, ZnO or K2O can be directly used. Alternatively, the raw materials can be precursors, such as inorganic salts, inorganic minerals or inorganic acids, which can be decomposed to generate the components of the sodium-calcium glass during melting or annealing, and the mass ratio of the precursors is determined by the stoichiometric ratio of the components of the sodium-calcium glass. For example, Na2CO3, Na2SO4, NaNO3, CaCO3, Ca(OH)2, Na2B4O7, H3BO3, Al(OH)3, ZnCO3, K2CO3 or KNO3 can be used.

[0062] It should be noted that the expression "total mass of the raw materials" refers to the total mass of the raw materials calculated in terms of oxides. When one or more components of the raw materials are provided in the form of a precursor, the mass of the raw materials is calculated in terms of the mass of the oxide corresponding to the precursor. For example, when 1 mole of Na2CO3 is used as a precursor of Na2O, 1 mole of Na2CO3 corresponds to 1 mole of Na2O, and in this case, the mass of the raw materials is calculated in terms of 1 mole of Na2O.

[0063] In some embodiments, the melting treatment is performed at a temperature of 1200°C to 1450°C for 6 hours to 24 hours.

[0064] In some embodiments, the melting treatment is performed under the action of a fining agent.

[0065] In the above "6h-24h", the specific values include the minimum and maximum values of the range, and every value between the minimum and maximum values, and the specific examples include but are not limited to the point values in the embodiments and the following point values: 6h, 7h, 8h, 9h, 10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 21h, 22h, 23h, 24h; or a range composed of any two numerical values.

[0066] In the above "1200℃-1450℃", the specific values include the minimum and maximum values of the range, and every value between the minimum and maximum values, and the specific examples include but are not limited to the point values in the embodiments and the following point values: 1200℃, 1250℃, 1300℃, 1350℃, 1400℃, 1450℃; or a range composed of any two numerical values.

[0067] The refining agent can function in the melting process, including but not limited to: removing bubbles and impurities, reducing color difference, etc. For example, during the melting process, some gases that are difficult to volatilize, such as CO, CO2, N2, etc., are generated in the molten glass frit. These gases will form bubbles after the glass solidifies, reducing the transparency of the glass. Adding a refining agent can effectively reduce the number and size of these bubbles, making the glass appear more transparent and clear. For another example, during the melting process, some impurities of non-glass components may be introduced, such as metal ions, sulfur, phosphorus, etc. Adding a refining agent can adsorb and react with these impurities, allowing them to be removed from the glass, thereby obtaining a more pure glass material.

[0068] In some embodiments, the mass of the refining agent is 0.2%-0.5% of the total mass of the raw materials.

[0069] In the above "0.2%-0.5%", the mass percentage of the refining agent includes the minimum and maximum values of the range, and every value between the minimum and maximum values, and the specific examples include but are not limited to the point values in the embodiments and the following point values: 0.2%, 0.3%, 0.4%, 0.5%; or a range composed of any two numerical values.

[0070] The refining agent can be various types of refining agents commonly used in the art.

[0071] In some embodiments, the refining agent includes at least one of sodium fluorosilicate, calcium fluoride, and cerium oxide.

[0072] In some embodiments, after the step of the forming process, the method further includes the following step S11.

[0073] Step S11: annealing the product obtained by the forming process.

[0074] In some embodiments, the annealing process is performed at a temperature of 550-650℃ for 2-10 hours.

[0075] In the range of 2-10 hours, the specific values include the minimum and maximum values of the range, and every value between the minimum and maximum values. The specific examples include, but are not limited to, the point values in the embodiments and the following point values: 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h; or a range composed of any two values.

[0076] In the range of 550-650℃, the specific values include the minimum and maximum values of the range, and every value between the minimum and maximum values. The specific examples include, but are not limited to, the point values in the embodiments and the following point values: 550℃, 560℃, 570℃, 580℃, 590℃, 600℃, 610℃, 620℃, 630℃, 640℃, 650℃; or a range composed of any two values.

[0077] In some embodiments, the forming process is casting forming. Specifically, the glass material is formed in a corresponding mold according to the shape of the glass material.

[0078] In some embodiments, after the forming process and before the annealing process, a polishing process is further included.

[0079] Optionally, the polishing process is performed by flame polishing.

[0080] In some embodiments, after the annealing process, a cooling process is further included. Optionally, the temperature is reduced to 100℃ within 0.5h, and then naturally cooled to room temperature.

[0081] Another embodiment of the present application further provides a glass product, which comprises the soda-lime glass or the soda-lime glass prepared by the method described above.

[0082] In some embodiments, the glass product comprises a first glass component and a second glass component which are fused with each other, the first glass component comprises the soda-lime glass described above, and the second glass component comprises an aluminum-silicon glass.

[0083] The first glass component has a thermal expansion coefficient close to that of the conventional aluminum-silicon glass, and thus can maintain a low difference in deformation when fused with the aluminum-silicon glass material, improve the fusion quality, and make the bonding interface smoother.

[0084] In some embodiments, the aluminum-silicon glass has a thermal expansion coefficient of 6.5×10 -6 / ℃-8×10 -6 / ℃.

[0085] Specifically, the aluminum-silicon glass can be a conventional aluminum-silicon glass; further, the components of the aluminum-silicon glass include SiO2and Al2O3. 3。

[0086] Further, the components of the aluminum-silicon glass include SiO2, Al2O3and other components. Further, in the aluminum-silicon glass, the mass percentages of SiO2and Al2O3are 50% to 60% and 20% to 30% respectively, based on the total mass of the aluminum-silicon glass.

[0087] The other components can be the components commonly used in the aluminum-silicon glass in the art, including but not limited to various oxides, such as ZnO, Na2O, etc.

[0088] In some embodiments, the difference between the thermal expansion coefficient of the second glass component and the thermal expansion coefficient of the first glass component is T under the same environment at 0 to 300°C, satisfying: -0.5×10 -6 / ℃≤T≤0.5×10 -6 / ℃, more preferably -0.5×10 -6 / ℃≤T≤0.

[0089] In some embodiments of the present application, the method for preparing the above glass product comprises the following step S20.

[0090] Step S20: bonding at least part of the above first glass component with the second glass component, and then performing fusion treatment to obtain the glass product.

[0091] In some embodiments, the temperature of the fusion treatment is 550°C to 650°C.

[0092] It can be understood that the shapes of the first glass component and the second glass component can be changed according to the shape of the glass product actually required, without specific requirements.

[0093] In some embodiments, the first glass component has a hollow structure.

[0094] The present application will be described in detail below with reference to specific embodiments, but the present application is not limited to the following embodiments, and it should be understood that the appended claims generalize the scope of the present application, and those skilled in the art should realize that changes made to the embodiments of the present application will be covered by the spirit and scope of the claims of the present application.

[0095] The following are specific embodiments.

[0096] Embodiment 1

[0097] (1) Provide raw materials according to the chemical component proportions of the soda-lime glass shown in Table 1: SiO2, Na2CO3, NaNO3, CaCO3, Na2B4O7, H3BO3, Al2O3, ZnO, K2CO3, and KNO3, and mix the raw materials. The chemical component proportions of the soda-lime glass are shown in Table 1. It should be noted that the content of each component in Table 1 is calculated in the form of oxide.

[0098] (2) Put the above prepared raw materials into a crucible inner sleeve (alumina-silica ceramic), and add a fining agent (cerium oxide) with a mass of K% of the total mass of the glass raw materials (see Table 2 for details), melt at 1200-1450°C for 12h, and record the fining temperature to obtain a glass melt slurry; then the glass melt slurry is placed in a flame-preheated hollow profiled forming mold, cast into a hollow glass part, polished with a flame at the air contact position, then annealed at 600°C for 4h, and cooled to 100°C at a rate of 0.5h, and then taken out to obtain a hollow glass part.

[0099] Bond the hollow glass part with an alumina-silica glass flat sheet (thermal expansion coefficient of 0-300°C, see Table 2) at the fusion temperature to obtain a glass product. The fusion temperature is shown in Table 2.

[0100] (3) Test

[0101] 1. Test the thermal expansion coefficients H1 of the hollow glass part and H2 of the alumina-silica glass flat sheet according to GB / T 16920-2015, respectively. The specific results are shown in Table 2.

[0102] 2. Test or observe the fusion interface of the prepared glass product to test the fusion effect, and the specific method is as follows:

[0103] (1) Put the fused glass product into an ultrasonic wave for oscillation at a frequency of 40Hz for 3h, and observe whether the fusion area falls off. The specific results of the oscillation test are shown in Table 2.

[0104] (2) Use an Instron 5944 universal material testing machine to apply a tensile force at a loading speed of 0.5mm / min, and record the maximum load value when the fusion surface is tensile fractured. The specific results are shown in Table 2.

[0105] Examples 2-6

[0106] Examples 2-6 are basically the same as Example 1, except that the components and corresponding raw materials of the soda-silica glass in step (1) are different from those of Example 1, as shown in Table 1.

[0107] The other steps and conditions are the same as those of Example 1, and the specific results are shown in Table 2.

[0108] Comparative Examples 1-5

[0109] Comparative Examples 1-5 are basically the same as Example 1, except that the components of the sodium calcium glass and the corresponding raw materials in step (1) are different from those of Example 1, as shown in Table 1.

[0110] The other steps and conditions are the same as those of Example 1, and the specific results are shown in Table 2.

[0111] The components of the sodium calcium glass in each of the examples and comparative examples are shown in Table 1, and the process parameters and test results are shown in Table 2.

[0112] Table 1

[0113] Table 2

[0114] From the data in Table 1 and Table 2, it can be seen that the sodium calcium glass of the present application, by adjusting the components of the sodium calcium glass, obtains a thermal expansion coefficient similar to that of the traditional aluminum silicon glass (6.5×10 -6 / ℃-8×10 -6 / ℃), and when fused with the aluminum silicon glass, can maintain a low difference in deformation, improve the fusion quality, and make the bonding interface smoother.

[0115] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0116] The above examples only express several embodiments of the present application, and the description is more specific and detailed, but it should not be construed as limiting the scope of the patent application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present patent should be subject to the appended claims. Industrial applicability

[0117] The present disclosure provides a sodium calcium glass. In the above-described sodium calcium glass, by adjusting the components of the sodium calcium glass, the thermal expansion coefficient of the sodium calcium glass is controlled to be similar to that of the traditional aluminum silicon glass (6.5×10 -6 / ℃-8×10 -6 / ℃), and when fused with the aluminum silicon glass, a low difference in deformation can be maintained, the fusion quality is improved, and the bonding interface is smoother.

Claims

1. A soda-lime glass, the components of the soda-lime glass comprising: SiO2, Na2O, CaO, B2O3, ZnO and K2O, the mass percentage of B2O3 is 3% to 7% according to the total mass of the soda-lime glass; the mass percentage of Na2O is 6% to 14%, and the mass percentage of ZnO is 1.5% to 5%; The coefficient of thermal expansion of the soda-lime glass is 6.5 x 10 -6 / °C to 8 x 10 -6 / °C.

2. The soda-lime glass of claim 1, wherein, The mass percentage of B2O3 is 3% to 6% according to the total mass of the soda-lime glass; the mass percentage of Na2O is 6% to 11%, and the mass percentage of ZnO is 1.5% to 3%.

3. The soda-lime glass of claim 1, wherein, The components of the soda-lime glass according to the total mass of the soda-lime glass include: 60% to 80% SiO2, 6% to 14% Na2O, 4% to 12% CaO, 3% to 7% B2O3, 0 to 2% Al2O3, 1.5% to 5% ZnO and 1% to 2% K2O.

4. The soda-lime glass according to any one of claims 1 to 3, wherein, The components of the soda-lime glass according to the total mass of the soda-lime glass include: 70% to 80% SiO2, 6% to 11% Na2O, 4% to 8% CaO, 3% to 6% B2O3, 0 to 1% Al2O3, 1.5% to 3% ZnO and 1% to 2% K2O.

5. The preparation method of the soda-lime glass according to claim 1, comprising the following steps: The raw materials are provided according to the composition of the soda-lime glass, the raw materials are mixed, and sequentially subjected to a melting treatment and a forming treatment to obtain a soda-lime glass, wherein The raw materials include providing SiO2 or a precursor thereof, Na2O or a precursor thereof, CaO or a precursor thereof, B2O3 or a precursor thereof, ZnO or a precursor thereof and K2O or a precursor thereof, wherein, in the form of oxides, the mass percentage of B2O3 or the precursor thereof is 3% to 7% according to the total mass of the raw materials; the mass percentage of Na2O or the precursor thereof is 6% to 14%, and the mass percentage of ZnO or the precursor thereof is 1.5% to 5%.

6. The method of making a soda-lime glass according to claim 5, wherein, In the form of oxides, the mass percentage of B2O3 or the precursor thereof is 3% to 6% according to the total mass of the raw materials; the mass percentage of Na2O or the precursor thereof is 6% to 11%, and the mass percentage of ZnO or the precursor thereof is 1.5% to 3%.

7. The method of making a soda-lime glass according to claim 5, wherein, In the form of oxides, the providing of the raw materials includes providing 60% to 80% of SiO2 or the precursor thereof, 6% to 14% of Na2O or the precursor thereof, 4% to 12% of CaO or the precursor thereof, 3% to 7% of B2O3 or the precursor thereof, 0 to 2% of Al2O3 or the precursor thereof, 1.5% to 5% of ZnO or the precursor thereof, and 1% to 2% of K2O or the precursor thereof according to the total mass of the raw materials.

8. The method of producing a soda-lime glass according to any one of claims 5 to 7, wherein In the form of oxides, the providing of the raw materials includes providing 70% to 80% of SiO2 or the precursor thereof, 6% to 11% of Na2O or the precursor thereof, 4% to 8% of CaO or the precursor thereof, 3% to 6% of B2O3 or the precursor thereof, 0 to 1% of Al2O3 or the precursor thereof, 1.5% to 3% of ZnO or the precursor thereof, and 1% to 2% of K2O or the precursor thereof according to the total mass of the raw materials.

9. The method of producing a soda-lime glass according to any one of claims 5 to 8, wherein The temperature of the melting treatment is 1200°C to 1450°C, and the time is 6h to 24h.

10. The method of producing the soda-lime glass according to any one of claims 5 to 9, wherein after the step of the forming process, further comprising the step of: subjecting the product from the forming process to an annealing process; the annealing process being at a temperature of 550°C to 650°C for a time of 2 hours to 10 hours.

11. A glass product comprising the soda-lime glass according to any one of claims 1 to 4 or produced by the method of producing the soda-lime glass according to any one of claims 5 to 10.

12. The glass article of claim 11, wherein, the glass product comprising a first glass part and a second glass part that are fusion-bonded to each other, the first glass part comprising the soda-lime glass, and the second glass part comprising an alumino-silicate glass.

13. The glass article of claim 12, wherein, the first glass part has a hollow structure. the first glass part has a hollow structure.

14. The glass article of claim 12 or 13, wherein, The coefficient of thermal expansion of the aluminum-silicon glass is 6.5 x 10 -6 / °C to 8 x 10 -6 / °C at 0 to 300°C.

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