Surface-devitrified transparent microcrystalline glass as well as heterogeneous induction preparation method and application thereof

Abstract

The invention discloses surface-devitrified transparent microcrystalline glass, a heterogeneous induction preparation method thereof and application of the surface-devitrified transparent microcrystalline glass in preparation of glass devices or electronic equipment. The surface crystallization thickness of the transparent microcrystalline glass is 3-25 microns, and the crystalline phase of the surface crystallization comprises Virgiite crystals. The preparation method adopts out-phase induction and comprises the following steps: performing heat treatment on basic glass under the condition that part or all of the surface of the basic glass is in contact with a specific phase, so that part or all of the surface, in contact with the specific phase, of the basic glass is devitrified, and the transparent microcrystalline glass with the devitrified surface is obtained, the specific phase comprises one or more of Al2O3 and substances capable of generating Al2O3 in the heat treatment process.

Description

Technical Field

[0001] This invention relates to the field of transparent glass-ceramics, specifically to a transparent glass-ceramic with surface crystallization, its heterogeneous phase-induced preparation method, and its application. Background Technology

[0002] As an important functional material, the performance of transparent microcrystalline glass largely depends on the composition, structure, and distribution of its internal crystalline phases. The patent specification with publication number CN110143759A discloses a high-strength transparent microcrystalline glass. By mass fraction, the glass comprises: SiO2 65~73%; Al2O3 3~10%; Na2O 1.5~4%; Li2O 10~14%; P2O5 1.5~4%; ZrO2 1.5~5%; clarifying agent 0~1%; 2≤(Al2O3+ZrO2) / P2O5≤6; -0.5<(P2O5-Na2O-K2O)<0.5, and its crystalline phase includes Li2Si2O5 or LiAlSi4O3. 10 .

[0003] Traditional glass-ceramic fabrication techniques primarily rely on monolithic crystallization, which involves uniformly distributing nucleating agents within a glass matrix and then heat-treating to form uniformly distributed microcrystals. While this method can achieve some performance improvements, it struggles to precisely control the crystal growth position and morphology, particularly preventing surface-selective crystallization. Monolithic crystallization often leads to a trade-off between light transmittance and mechanical properties, limiting its application in high-end optics and electronics.

[0004] In recent years, with the development of new electronic devices and optical components, higher requirements have been placed on the surface properties of materials, necessitating the development of microcrystalline glass materials capable of selective surface functionalization. Surface crystallization technology, as a potential solution, can endow materials with special properties by forming specific crystal structures on the material surface, while maintaining the transparency and other characteristics of the matrix. However, existing surface crystallization methods mostly rely on complex physical processing techniques or special composition design, resulting in problems such as high difficulty in process control, high cost, and difficulty in scaling up.

[0005] In materials science, heterogeneous phase-induced crystallization is a common method for controlling crystal growth. By introducing specific interface materials, the local chemical environment can be altered, inducing the formation and oriented growth of specific crystalline phases. This method has been widely applied in thin film material preparation, but research on bulk glass materials is relatively limited. Particularly for transparent glass-ceramic systems, how to precisely control surface crystallization behavior through heterogeneous contact to achieve controllable adjustment of crystal structure, thickness, and properties remains a pressing scientific problem and technological challenge.

[0006] In this context, it is of great significance to develop a preparation technology for surface-crystallized transparent glass-ceramics based on heterogeneous induction. The key issues to be addressed in this technology include: selecting appropriate heterogeneous induction materials to trigger surface crystallization; designing reasonable glass compositions to ensure surface selective crystallization; optimizing heat treatment process parameters to control the thickness and structure of the crystallization layer; balancing the performance matching between the surface crystal layer and the glass matrix, etc. By systematically studying the interaction mechanism between heterogeneous materials and the glass surface and establishing a control method for surface crystallization, it is expected to provide a new technical approach for the development of new functional transparent glass-ceramic materials. Summary of the Invention

[0007] In a first aspect, the present invention provides a surface-crystallized transparent glass-ceramic with a surface crystallization thickness between 3 and 25 micrometers, and the crystalline phase of the surface crystallization includes Virgilite crystals.

[0008] The bulk phase of the surface-crystallized transparent glass-ceramic is an amorphous transparent body.

[0009] The surface-crystallized transparent glass-ceramic has excellent mechanical properties, and the Vickers hardness of its crystallized surface is greater than 860 HV, and further greater than 870 HV.

[0010] The light transmittance of the surface-crystallized transparent glass-ceramic at 550 nm with a thickness of 2 mm is greater than 86%, and further greater than 87.5%. Its crystallized surface can form a moth-eye-like structure after etching with hydrofluoric acid and other substances, improving the optical properties of the glass.

[0011] Further, the chemical formula of the Virgilite crystal is Li x Al x Si 3-x O6, 0 < x < 1, corresponding to PDF#31 - 0707.

[0012] The crystalline phase may further include at least one of magnesium aluminosilicate crystals and ZrO2 crystals.

[0013] Further, the chemical formula of the magnesium aluminosilicate crystal is MgAl2Si4O 12 , corresponding to PDF#27 - 0716.

[0014] Further, the ZrO2 crystal corresponds to PDF#80 - 0784.

[0015] The composition of the surface-crystallized transparent glass-ceramic may include SiO2, Al2O3, and Li2O. Further, in terms of mass percentage, in the composition of the surface-crystallized transparent glass-ceramic, the content of SiO2 is 55 - 65%, the content of Al2O3 is 7 - 14%, and the content of Li2O is 2 - 9%.

[0016] The composition of the transparent microcrystalline glass with surface crystallization may also include one or more of B2O3, Na2O, MgO, ZrO2, ZnO, and SnO2.

[0017] In some embodiments, the composition of the surface-crystallized transparent microcrystalline glass may include SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2. Further, by mass percentage, the composition of the surface-crystallized transparent microcrystalline glass may include: SiO2 55-65%, Al2O3 7-14%, B2O3 0.05-4%, Na2O 0.5-5%, Li2O 2-9%, MgO 1-6%, ZrO2 2-8%, ZnO 0.05-4%, and SnO2 0.05-4%. Even further, in the composition of the surface-crystallized transparent microcrystalline glass, the sum of the mass percentages of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2 is 100%.

[0018] Understandably, in some cases, the composition of the transparent microcrystalline glass with surface crystallization may contain unavoidable impurities.

[0019] In the composition of the transparent microcrystalline glass with surface crystallization, the raw materials providing SiO2 may include quartz sand, the raw materials providing Al2O3 may include aluminum hydroxide, aluminum oxide, etc., the raw materials providing B2O3 may include boric anhydride, boric acid, etc., the raw materials providing Na2O may include sodium carbonate, the raw materials providing Li2O may include lithium carbonate, the raw materials providing MgO may include (light) magnesium oxide, the raw materials providing ZrO2 may include zirconium oxide, the raw materials providing ZnO may include zinc oxide, etc., and the raw materials providing SnO2 may include tin oxide, etc.

[0020] In a second aspect, the present invention provides a method for preparing the transparent microcrystalline glass with surface crystallization as described in the first aspect, which employs heterogeneous induction and includes: heat-treating the base glass under the condition that part or all of the surface of the base glass is in contact with a specific phase, so that part or all of the surface of the base glass in contact with the specific phase crystallizes, thereby obtaining the transparent microcrystalline glass with surface crystallization. The specific phase includes one or more of Al2O3 and substances capable of generating Al2O3 during the heat treatment. The Al2O3 can be any phase of Al2O3, preferably including β-Al2O3. Substances capable of generating Al2O3 during the heat treatment include Al, Al(OH)3, etc. The specific phase is not limited in form and can be ceramic sheet, metal foil, metal sheet, powder, etc.

[0021] The composition of the base glass preferably includes SiO2, Al2O3, and Li2O. Further, by mass percentage, the base glass contains 55-65% SiO2, 7-14% Al2O3, and 2-9% Li2O.

[0022] The composition of the base glass may also include one or more of B2O3, Na2O, MgO, ZrO2, ZnO, and SnO2.

[0023] In some embodiments, the composition of the base glass may include SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2. Further, by mass percentage, the composition of the base glass may include: SiO2 55-65%, Al2O3 7-14%, B2O3 0.05-4%, Na2O 0.5-5%, Li2O 2-9%, MgO 1-6%, ZrO2 2-8%, ZnO 0.05-4%, and SnO2 0.05-4%. Even further, in the composition of the base glass, the sum of the mass percentages of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2 is 100%.

[0024] Understandably, in some cases, the composition of the base glass may contain unavoidable impurities.

[0025] In the composition of the base glass, the raw materials providing SiO2 may include quartz sand, the raw materials providing Al2O3 may include aluminum hydroxide, aluminum oxide, etc., the raw materials providing B2O3 may include boric anhydride, boric acid, etc., the raw materials providing Na2O may include sodium carbonate, the raw materials providing Li2O may include lithium carbonate, the raw materials providing MgO may include (light) magnesium oxide, the raw materials providing ZrO2 may include zirconium oxide, the raw materials providing ZnO may include zinc oxide, etc., and the raw materials providing SnO2 may include tin oxide, etc.

[0026] The preparation method of the base glass can employ commonly used processes in this field.

[0027] This invention provides a preferred method for preparing the base glass, comprising: mixing base glass raw materials to obtain a batch, melting and molding the batch, and then annealing the batch to obtain the base glass. After annealing, further operations such as cutting and polishing can be performed to obtain the base glass. The melting temperature can be 1500~1600℃.

[0028] In some embodiments, the raw materials of the base glass are as described above, so that the base glass may contain the corresponding oxides.

[0029] The temperature of the heat treatment can be 690~760℃, for example 700℃, 740℃, 750℃, etc., and can be further 700~750℃.

[0030] The heat treatment time can be less than 10 hours, such as 2 hours, 2.5 hours, 3 hours, 6 hours, etc., and can be further 2 to 6 hours.

[0031] The roles of the various components that may be involved in the composition of the base glass and the transparent microcrystalline glass with surface crystallization described in this invention are analyzed as follows: 1. SiO2 (55~65wt%) acts as a glass network forger, constructing a stable [SiO4] tetrahedral framework structure, providing basic mechanical strength and chemical stability. Its content directly affects melt viscosity, crystallization behavior, and the transmittance of the final product. Optimizing the content can balance network integrity and ion mobility. Precisely controlling its content within the range of 55~65wt% ensures the integrity of the glass network structure while avoiding the increase in melting temperature and viscosity caused by excessive content.

[0032] 2. Al2O3 (7~14wt%) participates in network construction through [AlO4] / [AlO6] coordination, enhancing the glass's thermal stability, acid and alkali resistance, and mechanical strength. As a key component for surface crystallization, it promotes the formation of crystalline phases at heterogeneous contact interfaces.

[0033] 3. B2O3 (0.05~4wt%), as the most effective high-temperature flux, can reduce high-temperature viscosity and optimize melting performance. By adjusting the O / Si ratio, it affects network connectivity, controls the competition between internal crystal nucleation and surface crystallization, and ensures selective surface crystallization. In addition, B2O3 can also reduce the coefficient of thermal expansion of glass and improve its thermal shock resistance.

[0034] 4. Na₂O (0.5~5wt%) provides free oxygen to break the Si-O network, which can significantly reduce the melting temperature. Its ionic radius characteristics promote Li₂O₃ melting during heat treatment. + / Na + Interdiffusion forms a surface compressive stress layer, which synergistically enhances mechanical strength.

[0035] 5. Li₂O (2~9wt%) is the main crystal phase forming element, Li + The low field strength characteristic of Li significantly reduces the melt viscosity, while Li + The high mobility of Li₂O is the driving force behind surface-oriented crystallization. The synergistic effect of Li₂O with Al₂O₃ and SiO₂ promotes the formation of crystals with high quartz structure, which are key to endowing glass with high hardness and excellent mechanical properties.

[0036] 6. MgO (1~6wt%) acts as a network modifier to suppress bulk crystallization and allows the crystallization energy barrier to be preferentially overcome at the surface by increasing the glass transition temperature.

[0037] 7. ZrO2 (2~8wt%) has high field strength properties that enhance network crosslinking. As a heterogeneous nucleating agent, it preferentially forms crystal nuclei at the surface / alumina interface, inducing local crystallization. Its low solubility drives surface segregation, which is the physicochemical basis for inducing local crystallization.

[0038] 8. ZnO / SnO2 (0.05~4wt%): ZnO improves melt homogenization and optical properties of glass, while SnO2 decomposes at high temperatures to decompose oxygen and eliminate bubbles, making it the most environmentally friendly and efficient glass clarifying agent currently available. The two work synergistically to optimize optical uniformity and provide chemically active sites for subsequent acid etching to form moth-eye structures.

[0039] Thirdly, the present invention provides a method for improving the surface hardness of glass, comprising: heat-treating the base glass under the condition that part or all of the surface of the base glass is in contact with a specific phase, so that Virgilite crystals are precipitated on part or all of the surface of the base glass in contact with the specific phase, thereby improving the surface hardness of the glass. The specific phase includes one or more of Al2O3 and substances that can generate Al2O3 during the heat treatment process.

[0040] The method for improving the surface hardness of glass described in the third aspect can be further selected and optimized by referring to the preparation method of transparent microcrystalline glass with surface crystallization described in the second aspect.

[0041] In the heat treatment processes described in the second and third aspects, when the glass comes into contact with a specific phase, it can be induced to undergo crystallization behavior from the surface to the interior.

[0042] Fourthly, the present invention provides a transparent glass obtained by etching away the surface crystals of the transparent microcrystalline glass described in the first aspect to form a moth-eye structure. Further, it is preferable to use acid to etch away the surface crystals of the transparent microcrystalline glass. Even further, the acid used for etching is preferably hydrofluoric acid, and its mass concentration can be 40%, etc.

[0043] Fifthly, the present invention provides a method for preparing the transparent glass described in the fourth aspect, comprising: etching away the crystallization on the surface of the transparent microcrystalline glass to form a moth-eye structure, thereby obtaining the transparent glass. Further, it is preferable to use an acid to etch away the crystallization on the surface of the transparent microcrystalline glass. Even further, the acid used for etching is preferably hydrofluoric acid, and its mass concentration can be 40%, etc.

[0044] In a sixth aspect, the present invention provides a method for improving the transparency of the transparent microcrystalline glass with surface crystallization as described in the first aspect, comprising: etching away the surface crystallization of the transparent microcrystalline glass to form a moth-eye structure. Further, it is preferable to use an acid to etch away the surface crystallization of the transparent microcrystalline glass. Even further, the acid used for etching is preferably hydrofluoric acid, and its mass concentration may be 40%, etc.

[0045] The preparation method described in the fifth aspect and the method described in the sixth aspect can achieve a technical effect of increasing the 550 nm light transmittance by more than 0.5% (e.g., 1%, 3%, 4%, etc.) with a thickness of 2 mm, and can further achieve a technical effect of increasing the 550 nm light transmittance by 3~4% with a thickness of 2 mm.

[0046] In a seventh aspect, the present invention provides the application of the transparent microcrystalline glass with surface crystallization as described in the first aspect or the transparent glass as described in the fourth aspect in the fabrication of glass devices or electronic devices.

[0047] Eighthly, the present invention provides a glass device comprising the transparent microcrystalline glass with surface crystallization as described in the first aspect and / or the transparent glass as described in the fourth aspect.

[0048] In a ninth aspect, the present invention provides an electronic device comprising the transparent microcrystalline glass with surface crystallization as described in the first aspect and / or the transparent glass as described in the fourth aspect.

[0049] Compared with the prior art, the beneficial effects of this invention are as follows: (1) Compared with traditional monolithic crystallization technology, this invention achieves precise control of the crystal layer within a 3-25 μm range on the surface through contact induction of heterogeneous materials (such as β-Al2O3), while the glass phase maintains amorphous transparency. This surface-oriented crystallization technology enables the material to simultaneously possess high surface hardness (>860 HV) and light transmittance (>86%, 550 nm wavelength), solving the problem of mutual constraint between hardness and light transmittance in traditional microcrystalline glass.

[0050] (2) Compared with complex surface treatment technologies such as laser induction, the present invention only requires conventional heat treatment combined with heterogeneous contact to achieve controllable surface crystallization. The process equipment requirements are low, the repeatability is good, and it is suitable for large-scale production. Furthermore, a moth-eye-like anti-reflection structure can be formed in situ through hydrofluoric acid etching, which increases the light transmittance by 1-4%, thus achieving a synergistic improvement in surface functionalization and optical performance.

[0051] (3) This invention is the first to systematically demonstrate that heterogeneous materials (such as β-Al2O3) can induce the directional growth of crystals in glass through interfacial energy regulation, providing a new approach for the surface modification of glass-ceramics. Through component design and process optimization, the surface crystalline phase composition and thickness can be flexibly controlled, breaking through the limitations of traditional nucleating agent systems. Attached Figure Description

[0052] Figure 1 The images show the X-ray diffraction (XRD) characterization of the contact phase β-Al2O3 ceramic sheets used in Examples 1, 4, 5, and Comparative Example 3.

[0053] Figure 2 The XRD pattern of the transparent microcrystalline glass with surface crystallization in Example 1 is shown.

[0054] Figure 3 This is a cross-sectional scanning electron microscope (SEM) image of the transparent microcrystalline glass with surface crystallization in Example 1.

[0055] Figure 4 Scanning electron microscope (SEM) images of the transparent microcrystalline glass surface with surface crystallization in Example 1 before and after hydrofluoric acid etching.

[0056] Figure 5 The image shows the transmittance curves of the transparent microcrystalline glass with surface crystallization in Example 1 before and after hydrofluoric acid etching. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Operating methods not specifically specified in the following embodiments are generally performed under conventional conditions or as recommended by the manufacturer.

[0058] The glass product preparation process of each embodiment and comparative example includes the following steps: (1) Mix the raw materials evenly according to Table 1 or Table 2 to obtain the batch material; (2) The batch material is melted at 1600℃, shaped and then annealed to obtain a glass block; (3) The glass block is cut and polished to obtain the base glass; (4) Heat treatment is performed on the surface of the base glass in contact with the contact phase.

[0059] Tables 1 and 2 show the raw material formulations (unless otherwise specified, all are mass percentages) and specific process parameters for the above preparation process, as well as the final glass product performance. Specifically: Vickers hardness was tested using a micro Vickers hardness tester on the glass product before etching; transmittance was measured using a UV spectrophotometer, measuring the transmittance of a 10 mm × 10 mm × 2 mm glass slide at 550 nm wavelength along the 2 mm thickness; XRD patterns were obtained using an X-ray diffractometer to analyze the main crystalline phase. The XRD testing range was 10–80°, and the scanning speed was 5° / min; a surface crystallization layer thickness of 0 indicates no surface crystallization; the Virgilite crystals corresponding to Examples 1–5 are the main crystalline phase present in the surface crystallization layer; the β-spodumene crystal phase was measured on the entire glass product of Comparative Example 3; the glass product of Comparative Example 3 was not tested after etching at 550 nm. nm transmittance and Vickers hardness; the etching operation specifically includes: transferring a 40wt% hydrofluoric acid solution to the surface of the glass product that has been in contact with the contact phase for 3 minutes of etching, and then washing off the hydrofluoric acid solution with deionized water and calcium chloride.

[0060] Table 1 Table 2 Figure 1 The XRD patterns of the contact phase ceramic sheets used in Examples 1, 4, 5, and Comparative Example 3 are shown below. Figure 1 It can be seen that the ceramic flakes that promote crystallization on the glass surface are mainly β-Al2O3.

[0061] Figure 2 The XRD pattern of the transparent glass-ceramic with heterogeneous surface crystallization in Example 1 is shown below. Figure 2 It can be seen that mixed polycrystalline materials precipitate in the glass surface, with Virgilite crystals as the main component and MgAl2Si4O as a partial component. 12 Crystals, and trace amounts of ZrO2 crystals. The bulk phase of the transparent microcrystalline glass with surface crystallization in Example 1 is still an amorphous transparent body.

[0062] Figure 3 This is a SEM image of the cross-section of the transparent microcrystalline glass with heterogeneous surface crystallization induced in Example 1. Figure 3 It can be seen that a dense crystalline layer with a thickness of 20.37 μm is precipitated on the surface of the glass after heat treatment in contact with ceramic tiles.

[0063] Figure 4 The images shown are SEM images of the transparent microcrystalline glass surface before and after hydrofluoric acid etching in Example 1, showing that the transparent microcrystalline glass surface after etching forms a moth-eye-like structure.

[0064] Figure 5 The transmittance curves of the transparent microcrystalline glass surface with heterogeneous surface crystallization in Example 1 before and after hydrofluoric acid etching show that the transmittance of the transparent microcrystalline glass surface with heterogeneous surface crystallization after etching increases from 87.49% to 90.58% at a wavelength of 550 nm due to the formation of a moth-eye-like structure.

[0065] Furthermore, it should be understood that after reading the above description of the present invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A transparent microcrystalline glass with surface crystallization, characterized in that, The surface crystallization thickness is between 3 and 25 micrometers, and the crystalline phase of the surface crystallization includes Virgilite crystals.

2. The transparent microcrystalline glass with surface crystallization according to claim 1, characterized in that, The bulk phase of the transparent microcrystalline glass with surface crystallization is an amorphous transparent body; The transparent microcrystalline glass with surface crystallization has a Vickers hardness greater than 860 HV, and further greater than 870 HV, and a 550 nm light transmittance greater than 86%, and further greater than 87.5%, at a thickness of 2 mm. The chemical formula of the Virgilite crystal is Li x Al x Si 3-x O6, where 0 < x < 1, corresponding to PDF#31-0707; The crystalline phase also includes at least one of magnesium aluminum silicate crystals and ZrO2 crystals; The chemical formula for the magnesium aluminosilicate crystal is MgAl2Si4O. 12 The corresponding PDF is #27-0716. The ZrO2 crystal corresponds to PDF#80-0784; The transparent microcrystalline glass with surface crystallization comprises SiO2, Al2O3, and Li2O; by mass percentage, the SiO2 content in the transparent microcrystalline glass with surface crystallization is 55-65%, the Al2O3 content is 7-14%, and the Li2O content is 2-9%. Furthermore, the composition of the transparent microcrystalline glass with surface crystallization also includes one or more of B2O3, Na2O, MgO, ZrO2, ZnO, and SnO2. The transparent microcrystalline glass with surface crystallization comprises SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2; further, by mass percentage, the transparent microcrystalline glass with surface crystallization comprises: SiO2 55~65%, Al2O3 7~14%, B2O3 0.05~4%, Na2O 0.5~5%, Li2O 2~9%, MgO 1~6%, ZrO2 2~8%, ZnO 0.05~4%, and SnO2 0.05~4%; even further, the sum of the mass percentages of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO, and SnO2 in the transparent microcrystalline glass with surface crystallization is 100%.

3. The method for preparing transparent microcrystalline glass with surface crystallization according to claim 1 or 2, characterized in that, The method employs heterogeneous induction, which includes: heat-treating the base glass under conditions where a specific phase is in contact with part or all of the surface of the base glass, causing crystallization to occur on part or all of the surface of the base glass in contact with the specific phase, thereby obtaining a transparent microcrystalline glass with surface crystallization. The specific phase includes one or more of Al2O3 and substances that can generate Al2O3 during the heat treatment process.

4. A method for improving the surface hardness of glass, characterized in that, include: Under the condition that a specific phase is in contact with part or all of the surface of a base glass, the base glass is heat-treated to cause Virgilite crystals to precipitate on part or all of the surface of the base glass in contact with the specific phase, thereby increasing the surface hardness of the glass. The specific phase includes one or more of Al2O3 and substances that can generate Al2O3 during the heat treatment process.

5. A transparent glass, characterized in that, It is obtained by etching away the crystallized transparent microcrystalline glass surface as described in claim 1 or 2 to form a moth-eye structure.

6. The method for preparing transparent glass according to claim 5, characterized in that, include: The transparent glass is obtained by etching away the crystals on the surface of the transparent microcrystalline glass to form a moth-eye structure.

7. A method for improving the transparency of a transparent microcrystalline glass with surface crystallization as described in claim 1 or 2, characterized in that, include: The transparent microcrystalline glass surface is etched away to form a moth-eye structure.

8. The application of the transparent microcrystalline glass with surface crystallization according to claim 1 or 2, or the transparent glass according to claim 5, in the fabrication of glass devices or electronic devices.

9. A glass device, characterized in that, This includes the transparent microcrystalline glass with surface crystallization as described in claim 1 or 2 and / or the transparent glass as described in claim 5.

10. An electronic device, characterized in that, This includes the transparent microcrystalline glass with surface crystallization as described in claim 1 or 2 and / or the transparent glass as described in claim 5.

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