High-toughness anti-dazzling sodium-calcium nanocrystalline glass, preparation method and application

Abstract

This invention relates to the field of microcrystalline glass technology, and discloses a high-toughness, anti-glare sodium-calcium nanocrystalline glass, its preparation method, and its application. The nanocrystalline glass is composed of glass raw materials, nucleating agents, and crystallizing agents. The preparation method is as follows: (1) grinding and mixing the glass raw materials in proportion to obtain a mixture; (2) heating the mixture to melt to obtain a glass melt; (3) pouring the glass melt into a preheated mold for molding, and then annealing it to obtain a base glass; (4) adding nucleating agents and crystallizing agents to the base glass; (5) performing a one-step heat treatment on the base glass to obtain sodium-calcium nanocrystalline glass; (6) performing a surface coating treatment on the sodium-calcium nanocrystalline glass to obtain a high-toughness, anti-glare sodium-calcium nanocrystalline glass. The microcrystalline glass prepared by this invention has a dense structure, high toughness, and high anti-glare characteristics, and can be used as a microcrystalline glass material for mobile phone and tablet glass covers.

Description

Technical Field

[0001] This invention relates to the field of microcrystalline glass technology, specifically to a high-toughness, anti-glare sodium-calcium nanocrystalline glass, its preparation method, and its application. Background Technology

[0002] Nanocrystalline glass plays a vital role in modern industrial and consumer electronics applications. It not only provides excellent scratch and impact resistance but also extends product lifespan. Nanocrystalline glass is a material produced by crystallizing traditional glass to precipitate crystalline phases within it. Since the precipitated nanocrystals are typically tens of nanometers in size, much smaller than the wavelength of visible light, they exhibit high transmittance. Therefore, nanocrystalline glass has gradually attracted attention and research interest in recent years. Currently, nanocrystalline glass prepared from glass preforms exhibits high grain size stability and uniform distribution, effectively eliminating common defects such as pores. These characteristics collectively endow nanocrystalline glass with superior performance and higher reliability compared to ceramics.

[0003] Generally speaking, the formation of crystal phases depends on the composition of the base glass and the heat treatment process. Existing nanocrystalline glass requires high crystallization temperature and long crystallization time, and often adopts a two-step heat treatment method, which increases production energy consumption. Moreover, the crystal phase content is relatively low, which affects the mechanical properties of microcrystalline glass such as toughness and bending strength.

[0004] Anti-glare glass is a diffuse-reflective matte structure manufactured using surface etching technology. It combines the high hardness and excellent optical properties of glass, meeting the diverse needs of high-hardness applications. The etching process creates uniform microtextures on the glass surface, which not only improves surface wear resistance but also reduces light reflection, enhancing anti-glare performance. Currently, most anti-glare glass uses ordinary soda-lime glass as its base material. While it boasts high hardness and good impact resistance, it lacks toughness. During subsequent anti-glare etching, its strength further decreases, making it difficult to meet the demands of high-end applications. Therefore, achieving a synergistic improvement in both high toughness and anti-glare performance is a pressing issue that needs to be addressed. Summary of the Invention

[0005] To address the above problems, the technical problem to be solved by the present invention is to provide a high-toughness, anti-glare sodium-calcium nanocrystalline glass, its preparation method and application. The obtained microcrystalline glass has a dense structure, high toughness and high anti-glare characteristics.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0007] A method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass includes the following preparation steps:

[0008] (1) Grind and mix the glass raw materials SiO2, Al2O3, CaO, MgO and Na2O in proportion to obtain a mixture;

[0009] (2) Heat the mixture to 1500℃-1600℃ to melt for 2-3 hours, then cool it down to 1300℃-1400℃ and hold for 1-2 hours to obtain glass melt;

[0010] (3) Pour the glass melt into a preheated mold to form it, and then cool the formed glass to 550℃-600℃ for heat preservation and annealing treatment for 1-2 hours. After that, let it cool naturally to room temperature to obtain the base glass.

[0011] (4) Add nucleating agent P2O5 and crystallizing agent MgF2 to the base glass to adjust the crystal phase ratio;

[0012] (5) The base glass is heated from room temperature to 640℃~800℃ at a heating rate of 5℃ / min, and kept at the temperature for 2.5h to allow the glass to be fully crystalline. Finally, it is cooled to room temperature to obtain sodium-calcium nanocrystalline glass.

[0013] (6) The sodium-calcium nanocrystalline glass is screen-printed with protective oil and polished, then cleaned and sprayed, chemically etched after spraying, and then chemically polished. Subsequently, the glass surface is subjected to a secondary chemical reaction by spraying nano-silica solution. Finally, it is baked and dried in an oven at 160°C for 30 minutes to obtain high-toughness, anti-glare sodium-calcium nanocrystalline glass.

[0014] As a further improvement of the present invention, in step (1), the glass raw material comprises, by molar percentage: 70–74% SiO2, 0–3% Al2O3, 6–12% CaO, 0–6% MgO, and 12–16% Na2O.

[0015] As a further improvement of the present invention, in step (2), the cooling rate is 5°C / min.

[0016] As a further improvement of the present invention, in step (4), the amount of nucleating agent is 1 mol of the total molar amount of glass raw material; the amount of crystallizing agent is 10 wt% of the total mass of glass raw material.

[0017] As a further improvement of the present invention, in step (5), the grain size of the nanocrystalline glass is 50-100 nm.

[0018] As a further improvement of the present invention, in step (6), the cleaning spray is to use an alkaline cleaning agent or alcohol spray to clean and remove oil stains from the glass surface.

[0019] As a further improvement of the present invention, in step (6), the chemical etching is first performed using ammonium bifluoride solution to form micron-level etching points with different orientations on the glass surface, then immersed in pure water 3 times to wash away the ammonium bifluoride solution on the surface, and finally dried with nitrogen gas.

[0020] As a further improvement of the present invention, in step (6), the chemical polishing is performed by fixing the glass on an acid-resistant support and immersing it in a hydrofluoric acid polishing tank or by spraying it with a flat plate line.

[0021] Sodium-calcium nanocrystalline glass prepared by the method described above.

[0022] Application of sodium-calcium nanocrystalline glass in mobile phone and tablet glass cover plates.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. This invention utilizes the synergistic effect of various components in the glass matrix, employing P2O5 as a nucleating agent and MgF2 as a crystallizing agent, resulting in a lower amount of residual bubbles in the microcrystalline glass. A one-step heat treatment process with a temperature of 640℃-800℃ ensures uniform distribution of nanocrystals in the soda-lime glass, resulting in small grain size and a relatively high crystalline phase content. The nanocrystalline glass exhibits a bending strength (4pb, four-point bending strength) > 600 MPa, demonstrating excellent bending resistance.

[0025] 2. This invention employs a one-step heat treatment method. The principle of one-step glass crystallization is to precisely control the temperature-time curve of a single heat treatment process, enabling the glass to simultaneously and efficiently complete the two stages of nucleation and crystal growth within a specific temperature range. This allows the crystal nuclei to grow synchronously into fine microcrystals. By synergistically controlling the nucleation and growth temperatures, a rapid and uniform transformation from the glass phase to the microcrystalline phase is achieved in a single heating cycle, resulting in glass with a dense structure and high toughness. Compared to the two-step method, it eliminates the need for two heating-holding-cooling cycles, avoiding the interfacial stress caused by temperature switching in the two-step method, reducing microcracks and porosity. Furthermore, the grain size uniformity is superior to the two-step method, with a grain deviation of less than 10%, while the grain deviation in the two-step method is typically 15%-20%.

[0026] 3. In the preparation process of this invention, the base glass is prepared first, and then the nucleating agent P2O5 and the crystallizing agent MgF2 are added. Compared with the process of adding nucleating agent and crystallizing agent during the mixing process, the high-temperature volatilization / decomposition of nucleating agent is reduced, which is conducive to maintaining surface activity and improving functionalization.

[0027] 4. This invention employs surface coating technology. First, a protective oil is screen-printed onto the glass surface to form a coating. Then, a polishing process is performed to remove ink residue from the glass surface. After cleaning and spraying, chemical etching is used to create a diffuse reflection matte structure on the nanocrystalline glass surface. Finally, chemical polishing is performed. The chemical polishing process first involves chemical polishing in a hydrofluoric acid polishing bath, followed by spraying a nano-silica solution to induce a secondary chemical reaction on the glass surface. Because the nano-silica surface is rich in silanol bonds, it reacts chemically with the silanol bonds on the clean glass surface at 160°C, condensing to form... Silicon and oxygen bonds allow the nano-silica film to adhere firmly to the glass surface. Simultaneously, the nano-silica itself can condense to form a protective film. Since the surface is a layer of stacked nano-silica protective film, its surface hardness is almost the same as that of glass. Therefore, through surface coating processes, the original reflective surface of the microcrystalline glass can be transformed into a matte diffuse reflective surface, blurring the reflective effect, preventing glare, reducing reflectivity, and minimizing shadows. At the same time, it maintains the high-toughness characteristics of microcrystalline glass, resulting in high-toughness, anti-glare nano-microcrystalline glass. Attached Figure Description

[0028] Figure 1 This is a SEM microstructure image of the sodium-calcium glass crystal of Example 1 of the present invention. Detailed Implementation

[0029] The specific embodiments of the present invention will be further described below with reference to examples.

[0030] Example 1

[0031] The glass raw materials are formulated according to the following molar percentages: SiO2 72%, Al2O3 2%, CaO 9%, MgO 3%, Na2O 14%. The purity of all glass raw materials is preferably analytical grade, and the particle size is preferably in the micrometer range. The total mass of the glass raw materials is 120.28 g (total moles are 2 mol), the amount of nucleating agent P2O5 is 2.84 g, and the amount of crystallizing agent MgF2 is 12.03 g.

[0032] A method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass includes the following preparation steps:

[0033] (1) Mixing: Grind and mix the glass raw materials SiO2, Al2O3, CaO, MgO and Na2O in proportion to obtain a mixture;

[0034] (2) Melting: Pour the mixture into a crucible, place it in a silicon carbide rod electric furnace, heat it to 1550℃ and melt it for 3 hours, then cool it down to 1350℃ at a cooling rate of 5℃ / min and hold it for 2 hours to obtain glass melt;

[0035] (3) Molding and annealing: The glass melt is poured into a preheated mold for molding, and the molten glass is cooled to 550°C and annealed in a muffle furnace for 2 hours. Then it is naturally cooled to room temperature to obtain the base glass.

[0036] (4) Add nucleating agent and crystallizing agent: Add P2O5 nucleating agent and MgF2 crystallizing agent to the base glass to adjust the crystal phase ratio. Use the nucleating agent and crystallizing agent together to induce the separation of the spindle phase, reduce the crystallization activation energy, and achieve better crystallization of the raw materials.

[0037] (5) Heat treatment: The base glass is heated from room temperature to 640°C at a heating rate of 5°C / min and held for 2.5h to allow the glass to be fully crystalline. Finally, it is cooled to room temperature to obtain sodium-calcium nanocrystalline glass.

[0038] (6) Surface coating treatment: The nano-microcrystalline glass substrate is screen-printed with protective oil and polished, then cleaned and sprayed, chemically etched after spraying, and then chemically polished. Subsequently, the glass surface is subjected to a secondary chemical reaction by spraying nano-silica solution (mass concentration 8%, pH value 3, particle size 20-50nm). The spraying time is 90s. Finally, it is baked and dried in an oven at 160℃ for 30min to obtain high toughness, anti-glare sodium-calcium nano-microcrystalline glass.

[0039] Cleaning spraying uses an alkaline cleaning agent (5% NaOH solution by mass concentration) to remove oil stains from the glass surface to achieve a high degree of surface cleanliness.

[0040] Chemical etching involves using an ammonium bifluoride solution (10% by mass) to etch the glass surface at a temperature of 35°C, creating micron-sized etching points with different orientations on the glass surface. The surface is then immersed in pure water three times to wash away the ammonium bifluoride solution, and finally dried with nitrogen gas.

[0041] Chemical polishing involves fixing the glass on an acid-resistant support and immersing it in a hydrofluoric acid polishing bath for chemical polishing.

[0042] Figure 1 The image shows a SEM image of the sodium-calcium microcrystalline glass prepared in Example 1. It can be seen that the precipitated crystals reach the nanoscale size and are relatively uniformly distributed, with a grain size of 50-100 nm.

[0043] Example 2

[0044] The glass raw materials are formulated according to the following molar percentages: SiO2 72%, Al2O3 2%, CaO 9%, MgO 0–6%, Na2O 14%. The purity of all glass raw materials is preferably analytical grade, and the particle size is preferably in the micrometer range. The total mass of the glass raw materials is 120.28 g (total moles are 2 mol), the amount of nucleating agent P2O5 is 2.84 g, and the amount of crystallizing agent MgF2 is 12.03 g.

[0045] A method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass includes the following preparation steps:

[0046] (1) Mixing: Grind and mix the glass raw materials SiO2, Al2O3, CaO, MgO and Na2O in proportion to obtain a mixture;

[0047] (2) Melting: Pour the mixture into a crucible, place it in a silicon carbide rod electric furnace, heat it to 1500℃ and melt it for 3 hours, then cool it down to 1300℃ at a cooling rate of 5℃ / min and hold it for 2 hours to obtain glass melt;

[0048] (3) Molding and annealing: The glass melt is poured into a preheated mold for molding, and the molten glass is cooled to 550°C and annealed in a muffle furnace for 2 hours. Then it is naturally cooled to room temperature to obtain the base glass.

[0049] (4) Add nucleating agent and crystallizing agent: Add P2O5 nucleating agent and MgF2 crystallizing agent to the base glass to adjust the crystal phase ratio. Use the nucleating agent and crystallizing agent together to induce the separation of the spindle phase, reduce the crystallization activation energy, and achieve better crystallization of the raw materials.

[0050] (5) Heat treatment: The base glass is heated from room temperature to 640°C at a heating rate of 5°C / min and held for 2.5h to allow the glass to be fully crystalline. Finally, it is cooled to room temperature to obtain sodium-calcium nanocrystalline glass.

[0051] (6) Surface coating treatment: The nano-microcrystalline glass substrate is screen-printed with protective oil and polished, then cleaned and sprayed, chemically etched after spraying, and then chemically polished. Subsequently, the glass surface is subjected to a secondary chemical reaction by spraying nano-silica solution (mass concentration 8%, pH value 3, particle size 20-50nm). The spraying time is 90s. Finally, it is baked and dried in an oven at 160℃ for 30min to obtain high toughness, anti-glare sodium-calcium nano-microcrystalline glass.

[0052] The cleaning spray first uses an alkaline cleaning agent (5% NaOH solution) to remove oil stains from the glass surface to achieve a high degree of surface cleanliness.

[0053] Chemical etching involves using an ammonium bifluoride solution (10% by mass) to etch the glass surface at a temperature of 35°C, creating micron-sized etching points with different orientations on the glass surface. The surface is then immersed in pure water three times to wash away the ammonium bifluoride solution, and finally dried with nitrogen gas.

[0054] Chemical polishing involves fixing the glass on an acid-resistant support and immersing it in a hydrofluoric acid polishing bath for chemical polishing.

[0055] Example 3

[0056] The glass raw materials are formulated according to the following molar percentages: SiO2 72%, Al2O3 2%, CaO 9%, MgO 3%, Na2O 14%. The purity of all glass raw materials is preferably analytical grade, and the particle size is preferably in the micrometer range. The total mass of the glass raw materials is 120.28 g (total moles are 2 mol), the amount of nucleating agent P2O5 is 2.84 g, and the amount of crystallizing agent MgF2 is 12.03 g.

[0057] A method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass includes the following preparation steps:

[0058] (1) Mixing: Grind and mix the glass raw materials SiO2, Al2O3, CaO, MgO and Na2O in proportion to obtain a mixture;

[0059] (2) Melting: Pour the mixture into a crucible, place it in a silicon carbide rod electric furnace, heat it to 1600℃ and melt it for 2 hours, then cool it down to 1400℃ at a cooling rate of 5℃ / min and hold it for 1 hour to obtain glass melt;

[0060] (3) Molding and annealing: The glass melt is poured into a preheated mold for molding, and the molten glass is cooled to 600°C and annealed in a muffle furnace for 2 hours. Then it is naturally cooled to room temperature to obtain the base glass.

[0061] (4) Add nucleating agent and crystallizing agent: Add P2O5 nucleating agent and MgF2 crystallizing agent to the base glass to adjust the crystal phase ratio. Use the nucleating agent and crystallizing agent together to induce the separation of the spindle phase, reduce the crystallization activation energy, and achieve better crystallization of the raw materials.

[0062] (5) Heat treatment: The base glass is heated from room temperature to 680°C at a heating rate of 5°C / min and held at that temperature for 2.5h to allow the glass to fully crystallize. Finally, it is cooled to room temperature to obtain nanocrystalline glass.

[0063] (6) Surface coating treatment: The nano-microcrystalline glass substrate is screen-printed with protective oil and polished, then cleaned and sprayed, chemically etched after spraying, and then chemically polished. Subsequently, the glass surface is subjected to a secondary chemical reaction by spraying nano-silica solution (mass concentration 8%, pH value 3, particle size 20-50nm). The spraying time is 90s. Finally, it is baked and dried in an oven at 160℃ for 30min to obtain high toughness, anti-glare sodium-calcium nano-microcrystalline glass.

[0064] Cleaning spraying uses an alkaline cleaning agent (5% NaOH solution) to remove oil stains from the glass surface to achieve a high degree of surface cleanliness.

[0065] Chemical etching involves using an ammonium bifluoride solution (10% by mass) to etch the glass surface at a temperature of 35°C, creating micron-sized etching points with different orientations on the glass surface. The surface is then immersed in pure water three times to wash away the ammonium bifluoride solution, and finally dried with nitrogen gas.

[0066] Chemical polishing involves fixing the glass on an acid-resistant support and immersing it in a hydrofluoric acid polishing bath for chemical polishing.

[0067] Example 4

[0068] Unlike Example 1, in step (5), the base glass is heated from room temperature to 760°C at a heating rate of 5°C / min, held at that temperature for 2.5 hours to allow the glass to fully crystallize, and finally cooled to room temperature to obtain nanocrystalline glass.

[0069] Example 5

[0070] Unlike Example 1, in step (5), the base glass is heated from room temperature to 800°C at a heating rate of 5°C / min, held at that temperature for 2.5 hours to allow the glass to fully crystallize, and finally cooled to room temperature to obtain nanocrystalline glass.

[0071] Comparative Example 1

[0072] Unlike Example 1, step (5) of the heat treatment is not performed; the remaining steps are the same as in Example 1.

[0073] Comparative Example 2

[0074] Unlike Example 1, the surface coating treatment in step (6) is not performed; the remaining steps are the same as in Example 1.

[0075] Comparative Example 3

[0076] The difference from Example 2 is that the surface coating treatment in step (6) is not performed; the remaining steps are the same as in Example 2.

[0077] Comparative Example 4

[0078] The difference from Example 3 is that the surface coating treatment in step (6) is not performed, and the remaining steps are the same as in Example 3.

[0079] Comparative Example 5

[0080] The difference from Example 4 is that the surface coating treatment in step (6) is not performed, and the remaining steps are the same as in Example 4.

[0081] Comparative Example 6

[0082] The difference from Example 5 is that the surface coating treatment in step (6) is not performed, and the remaining steps are the same as in Example 5.

[0083] Performance testing:

[0084] Quadriaxial bending strength tested using an electronic pressure testing machine.

[0085] Roughness measured using a dynamic friction tester.

[0086] The haze was measured using a haze meter.

[0087] The performance test results of Examples 1-5 and Comparative Examples 1-6 are shown in Table 1.

[0088] Table 1. Performance test results of nanocrystalline glass in each embodiment and comparative example.

[0089]

[0090] As can be seen from Examples 1-5 and Comparative Example 1, at a heat treatment temperature of 640℃-800℃, the toughness value of the heat-treated glass-ceramic ranges from 621.85 to 638.51 MPa, indicating a bending strength (4pb, four-point bending strength) > 600 MPa, demonstrating excellent bending resistance. Furthermore, within this heat treatment temperature range, the toughness test value of the nano-glass-ceramic first increases and then decreases with increasing heat treatment temperature. The toughness value of the untreated glass is 423.51 MPa, indicating poor bending resistance. In Example 4, the heat treatment temperature for the glass-ceramic was 760℃. At approximately 760℃, the test value of the nano-glass-ceramic was relatively high, reaching 638.51 MPa, indicating that more nanocrystals precipitated at this heat treatment temperature, thus improving the bending strength.

[0091] As can be seen from the roughness and haze tests of Examples 1-5 and Comparative Examples 2-6, the surface-treated crystallized glass exhibits significantly improved roughness and haze compared to the untreated crystallized glass. The surface coating treatment of this invention involves etching the glass surface into an uneven surface using a weak acid, followed by polishing away the tips of the uneven points with a weak acid to form a matte reflective surface, thus increasing the surface roughness of the crystallized glass. Higher roughness means a rougher surface increases light diffusion, reduces gloss, diffuses incident light, significantly reduces glare, and thus acts as an anti-glare agent.

[0092] In summary, this invention involves mixing, melting, molding, and annealing glass raw materials, then adding nucleating agents and crystallizing agents. A one-step heat treatment process precipitates nanoscale particles within the glass, increasing the contact area of ​​dislocations and thus improving the glass's mechanical properties. Finally, a surface coating process is applied: first, a protective oil is screen-printed onto the glass surface to form a coating; then, a polishing process removes ink residue; after cleaning and spraying, chemical etching alters the uneven surface of the glass; and finally, nano-silica is sprayed on. The silanol bonds of the nano-silica condense with the silanol bonds on the glass surface, forming an aged silica protective film layer that achieves a surface hardness almost identical to that of the glass, resulting in a high-toughness, anti-glare sodium-calcium nanocrystalline glass.

[0093] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should be covered by the patent of the present invention.

Claims

1. A method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass, characterized in that, The preparation steps include the following: (1) Grind and mix the glass raw materials SiO2, Al2O3, CaO, MgO and Na2O in proportion to obtain a mixture; (2) Heat the mixture to 1500℃-1600℃ to melt for 2-3 hours, then cool it down to 1300℃-1400℃ and hold for 1-2 hours to obtain glass melt; (3) Pour the glass melt into a preheated mold to form it, and then cool the formed glass to 550℃-600℃ for heat preservation and annealing treatment for 1-2 hours. After that, let it cool naturally to room temperature to obtain the base glass. (4) Add nucleating agent P2O5 and crystallizing agent MgF2 to the base glass to adjust the crystal phase ratio; (5) The base glass is heated from room temperature to 640℃~800℃ at a heating rate of 5℃ / min, and kept at the temperature for 2.5h to allow the glass to be fully crystalline. Finally, it is cooled to room temperature to obtain sodium-calcium nanocrystalline glass. (6) The sodium-calcium nanocrystalline glass is screen-printed with protective oil and polished, then cleaned and sprayed, chemically etched after spraying, and then chemically polished. Then, the glass surface is subjected to a secondary chemical reaction by spraying nano-silica solution. Finally, it is baked and dried in an oven at 160°C for 30 minutes to obtain high-toughness, anti-glare sodium-calcium nanocrystalline glass. In step (1), the glass raw material comprises, by molar percentage: 70–74% SiO2, 0–3% Al2O3, 6–12% CaO, 0–6% MgO, and 12–16% Na2O. In step (4), the amount of nucleating agent is 1 mol of the total molar amount of glass raw material; the amount of crystallizing agent is 10 wt% of the total mass of glass raw material; In step (6), the chemical etching is first performed using ammonium bifluoride solution to form micron-sized etching points with different orientations on the glass surface, then immersed in pure water three times to wash away the ammonium bifluoride solution on the surface, and finally dried with nitrogen gas.

2. The method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass as described in claim 1, characterized in that, In step (2), the cooling rate is 5℃ / min.

3. The method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass as described in claim 1, characterized in that, In step (5), the grain size of the nanocrystalline glass is 50-100 nm.

4. The method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass as described in claim 1, characterized in that, In step (6), the cleaning spray is to use an alkaline cleaning agent or alcohol spray to clean and remove oil stains from the glass surface.

5. The method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass according to claim 1, characterized in that, In step (6), the chemical polishing is performed by fixing the glass on an acid-resistant support and immersing it in a hydrofluoric acid polishing tank or by spraying it onto a flat plate.

6. The sodium-calcium nanocrystalline glass prepared by the method for preparing high-toughness, anti-glare sodium-calcium nanocrystalline glass according to any one of claims 1-5.

7. The application of the sodium-calcium nanocrystalline glass as described in claim 6 in the field of mobile phone and tablet glass cover plates.

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