High-strength transparent microcrystalline glass and preparation method thereof

Abstract

The invention relates to the technical field of electronic glass, in particular to high-strength transparent microcrystalline glass and a preparation method thereof. The high-strength transparent glass ceramic is prepared from the following raw materials in percentage by mass: 62.7%-71.9% of SiO2, 8.6%-25.5% of Al2O3, 2%-2.4% of B2O3, 2.2%-8.6% of Li2O, 1.0%-2.1% of Na2O, 2%-2.4% of P2O5, 1.9%-5.6% of ZrO2, 0%-1% of ZnO and 0%-1% of MgO, and a crystal phase of the high-strength transparent glass ceramic comprises one or more of petalite, beta-spodumene, beta-eucryptite and a beta-quartz solid solution. By controlling the mass percentage range of the raw materials, the high-strength transparent microcrystalline glass with high strength and high transmittance is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of electronic glass, and in particular to a high-strength transparent microcrystalline glass and a preparation method thereof. Background Art

[0002] In recent years, with the continuous rise and development of consumer electronic products, glass, as a transparent and high-performance material, has been widely used in such electronic devices. Mobile electronic display devices such as mobile phones and PDAs have touch functions, which requires the glass used in them to come into contact with various objects. Therefore, the glass not only needs to be able to withstand conventional touch contacts from applications for a long time, but also needs to withstand scratches and impacts that may occur during use, which puts higher requirements on the relevant properties of the glass. The commonly used touchable glass is chemically strengthened high-aluminum silicate cover glass. During use, it will come into contact with hard objects such as keys, resulting in scratches and minor damage on the surface, which not only shortens the service life of the equipment, but also increases the maintenance cost. Therefore, people are constantly committed to developing a microcrystalline glass and its products that are resistant to falling, pressure, scratches, and high transmittance.

[0003] Glass-ceramics is a material that precipitates crystals inside the glass through heat treatment. It has better mechanical properties than conventional high-aluminum silicate glass. On the other hand, glass-ceramics can also be chemically strengthened through ion exchange to form a compressive stress layer on the surface of the glass, further improving the mechanical properties. At present, glass-ceramics used in electronic devices need to have a high transmittance, otherwise it is difficult to be used in display devices and electronic devices with higher requirements. Therefore, it is urgent to develop a glass-ceramic with high strength and high transmittance that is suitable for display devices or electronic devices. Summary of the invention

[0004] The object of the present invention is to provide a high-strength transparent microcrystalline glass, so as to solve the problem of low transmittance of microcrystalline glass in the prior art.

[0005] The present invention also provides a method for preparing high-strength transparent microcrystalline glass to solve the problem of low transmittance of high-strength transparent microcrystalline glass after strengthening in the prior art.

[0006] In order to solve the above problems, the present invention proposes a high-strength transparent microcrystalline glass, and the technical solution adopted is: A high-strength transparent microcrystalline glass, the raw materials of which include, by mass percentage: 62.7%~71.9% SiO 2 、8.6%~25.5%Al 2 O 3 2%~2.4%B 2 O 3 2.2%~8.6%Li2 O, 1.0%~2.1%Na 2 O, 2%~2.4%P 2 O 5 1.9%~5.6%ZrO 2 , 0%~1% ZnO and 0%~1% MgO, wherein the crystalline phase of the high-strength transparent microcrystalline glass includes one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution.

[0007] The beneficial effects of the present invention are: SiO 2 It is a network former in glass, which is composed of silicon-oxygen tetrahedron [SiO 4 ] structure forms an irregular continuous network, constituting the glass skeleton; it is also an important component of the second phase, the crystalline phase, which can reduce the thermal expansion coefficient of the glass and reduce the difference with the thermal expansion coefficient of the second phase. 2 O 3 It is an intermediate oxide. When there are insufficient oxygen atoms in the glass, the coordination state of aluminum is aluminum-oxygen octahedron [AlO 6 ], in the network gap; when there are extra oxygen atoms in the glass, the coordination state of aluminum is aluminum-oxygen tetrahedron [AlO 4 ], enter the glass structure, play a role in filling the network, increase the stability of the glass, reduce the thermal expansion coefficient, increase the hardness of the glass, and is also an important component in the formation of the second phase. 2 O 3 In glass, it can reduce the viscosity of glass at high temperature and play a role in fluxing. 2 O is an alkali metal oxide and an important component of the matrix glass to form the second phase. It is also an important component for chemical strengthening through ion exchange. It can reduce the melting temperature of the glass and improve the formability. It not only plays a role in fluxing, but also does not affect the stability of the glass. It is easy to control the appearance and size of the second phase. 2 O is also an alkali metal oxide and a good flux in the glass component. It reduces the glass melting temperature and improves the formability. It is also a necessary component for chemical strengthening through ion exchange. 2 O 5 In glass, the coordination number is high, and its P 5+ The field is so strong that it can destroy the silicon-oxygen tetrahedral structure and capture O 2- Forming tetrahedrons, during the heat treatment process, it can be separated from the silicate network to promote phase separation, and during the phase separation process, the increase in temperature makes the glass components enriched, thus further promoting crystallization. ZrO 2 It is a good crystal nucleating agent for glass. 4+ The field strength of the ions is high, and the surrounding O 2- According to Zr 4+ The coordination number of the Si-O bonds is arranged by the so-called "accumulation". After robbing the free oxygen in the structure, the accumulation will continue to rob the bridging oxygen in the glass skeleton, making the O 2- Ions are more inclined to Zr 4+ , forming Si-O-Zr-O-Si, thus forming an accumulation, which will lead to phase separation or crystallization after heat treatment under appropriate conditions. MgO can reduce the viscosity of the matrix glass and inhibit the crystallization tendency of the matrix glass during molding. The addition of ZnO can improve the chemical stability of the glass. The present invention obtains high-strength transparent microcrystalline glass with relatively large strength and high transmittance by adjusting the above components, and simultaneously obtains microcrystalline glass with uniform crystallization and one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution. The obtained high-strength transparent microcrystalline glass has an average visible light transmittance of more than 85% and a Vickers hardness value of 680 kgf / mm 2 The above can be applied to the protective layer of a display device or a mobile electronic device.

[0008] In order to more easily control the formation and size of the second phase, i.e., the crystalline phase, and promote phase separation and crystallization, preferably, Al 2 O 3 / Li 2 O is 1~11.6, P 2 O 5 and ZrO 2 The total mass percentage is 4%~8%.

[0009] In order to fully enable the glass-ceramics to be chemically strengthened by ion exchange, preferably, the Li 2 O and Na 2 The total mass percentage of O is 4%~10.7%.

[0010] In order to make the high-strength transparent microcrystalline glass obtain a better average visible light transmittance, preferably, its raw materials include, by mass percentage: 64.7%~71.9% SiO 2 、8.6%~21.2%Al 2 O 3 2.1%~2.4%B 2 O 3 4.6%~8.6%Li 2 O, 1.3%~2.1%Na 2 O, 2%~2.4%P 2 O 5 , 2.1%~5.6%ZrO 2, 0.2%~1% ZnO and 0.3%~0.7% MgO, wherein the crystal phase of the high-strength transparent microcrystalline glass includes one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution; Al 2 O 3 / Li 2 O is 1~4.3, P 2 O 5 and ZrO 2 The total mass percentage of Li is 4.3%~7.8%; 2 O and Na 2 The total mass percentage of O is 6.1%~10.7%.

[0011] Preferably, the average visible light transmittance of the high-strength transparent microcrystalline glass is above 85%.

[0012] Preferably, the Vickers hardness of the high-strength transparent glass-ceramics is 680-730 kgf / mm 2 .

[0013] The present invention also proposes a method for preparing high-strength transparent microcrystalline glass, and the technical solution adopted is: A method for preparing high-strength transparent microcrystalline glass comprises: mixing, melting, molding and annealing the raw materials of the high-strength transparent microcrystalline glass in sequence to obtain a base glass sheet; heat-treating the base glass sheet to obtain a microcrystalline glass containing a crystalline phase; and chemically strengthening the microcrystalline glass containing a crystalline phase to obtain a high-strength transparent microcrystalline glass.

[0014] The beneficial effects of the present invention are as follows: the preparation method is simple and convenient, and after heat treatment, a second phase different from the glass phase, namely the crystalline phase, is generated to block further crack expansion to increase the hardness of the glass, and finally chemical strengthening is carried out by ion exchange to obtain a high-strength transparent microcrystalline glass with a certain ion exchange layer depth and surface compressive stress. The operation is simple and suitable for large-scale industrial applications.

[0015] In order to fully melt the raw materials, preferably, the melting step includes: a first step, heating the temperature to 1300~1400°C at a heating rate of 10~15°C / min, and maintaining for 60~90 minutes; a second step, heating the temperature to 1600~1620°C at a heating rate of 5~7°C / min, and maintaining for 4~5 hours.

[0016] In order to reduce the stress in the glass, preferably, the annealing temperature is 600-650° C. and the time is 2-2.5 hours.

[0017] In order to fully produce a second phase different from the glass phase, namely the crystalline phase, and further improve the hardness of the glass, preferably, the heat treatment includes a nucleation treatment and a crystallization treatment performed sequentially, the temperature of the nucleation treatment is 680~750°C, and the time of the nucleation treatment is 2~4h; the temperature of the crystallization treatment is 760~850°C, and the time of the crystallization treatment is 1~3h.

[0018] In order to fully carry out ion exchange and improve the transparency and strength of the microcrystalline glass, preferably, the chemical strengthening step includes: heating the first exchange liquid to 450~500℃ at a heating rate of 5~8℃ / min, placing the microcrystalline glass containing the crystalline phase in the first exchange liquid and keeping it warm for 4~6h, then heating the second exchange liquid to 400~450℃ at a heating rate of 5~8℃ / min, and placing the microcrystalline glass containing the crystalline phase that has passed through the first exchange liquid in the second exchange liquid and keeping it warm for 2~4h; wherein the first exchange liquid is potassium nitrate solution, and the second exchange liquid is sodium nitrate solution.

[0019] In order to further promote the formation of the crystalline phase, preferably, the microcrystalline glass containing the crystalline phase contains a crystal nucleating agent, and the mass of the crystal nucleating agent is 4.2% to 7.8% of the total mass of the high-strength transparent microcrystalline glass raw material.

[0020] Preferably, the average transmittance of the base glass sheet in the visible light range is between 90.1% and 91.3%.

[0021] Preferably, the Vickers hardness of the substrate glass sheet is 580-630 kgf / mm 2 .

[0022] Preferably, the Vickers hardness of the microcrystalline glass containing the crystalline phase is 635-680 kgf / mm 2 . DETAILED DESCRIPTION

[0023] The transmittance of the prior art microcrystalline glass is relatively low. The present invention provides a high-strength transparent microcrystalline glass, the raw materials of which include, by mass percentage: 62.7% to 71.9% SiO 2 、8.6%~25.5%Al 2 O 3 2%~2.4%B 2 O 3 2.2%~8.6%Li 2 O, 1.0%~2.1%Na 2 O, 2%~2.4%P 2 O 5 1.9%~5.6%ZrO 2, 0%~1% ZnO and 0%~1% MgO, wherein the crystalline phase of the high-strength transparent microcrystalline glass includes one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution.

[0024] The technical concept of the present invention is: in the high-strength transparent microcrystalline glass, SiO 2 It is an essential network former in glass and an essential component for forming a second phase by heat treatment of the matrix glass. 4 ] structure forms an irregular continuous network, forming the glass skeleton. If its content is less than 62.7%, it is difficult to obtain the corresponding crystal phase and crystallinity of the obtained glass. On the other hand, SiO 2 It will increase the viscosity of the matrix glass and make it difficult to melt. Therefore, SiO 2 The mass content is 62.7%~71.9%.

[0025] Al 2 O 3 It is also an oxide that can form a glass network structure and is an essential component for forming a second phase by heat treating the matrix glass. When there are insufficient oxygen atoms in the glass, the coordination state of aluminum is an aluminum oxide octahedron [AlO 6 ], in the network gap; when there are extra oxygen atoms in the glass, the coordination state of aluminum is aluminum-oxygen tetrahedron [AlO 4 ], enter the glass structure, play a role in filling the network, increase the stability of the glass, reduce the thermal expansion coefficient, and increase the hardness of the glass. In addition, Al 2 O 3 The melting point of Al is relatively high. If the content is too high, the melting point and devitrification resistance will be poor accordingly. 2 O 3 The mass content is 8.6%~25.5%.

[0026] B 2 O 3 In glass, B can reduce the viscosity of glass at high temperature and play a role in fluxing. 2 O 3 The mass content is 2%~2.4%.

[0027] Li 2 O is an alkali metal oxide and is also a necessary component for the formation of a second phase after heat treatment of the matrix glass. It can reduce the melting temperature of the glass and improve the formability. It not only plays a role in fluxing, but also does not affect the stability of the glass, and it is easy to control the appearance and size of the second phase. In addition, when chemically strengthened by ion exchange, Li 2 The presence of O will form a deeper compressive stress layer. 2If the O content is less than 2.2%, the precipitation of the lithium-containing second phase is not good, and the depth of the compressive stress layer formed after chemical strengthening is shallow, which cannot achieve the effect of improving strength through chemical strengthening. 2 The higher the O content, the lower the chemical durability and average linear expansion coefficient of the glass. Therefore, Li 2 The mass content of O is 2.2%~8.6%.

[0028] Na 2 O is an alkali metal oxide, which is a good flux in glass components, reducing the melting temperature of glass and improving formability. At the same time, glass contains Na 2 O component, when the glass-ceramics is chemically strengthened by ion exchange, + and K + The ion exchange of Na+ ions forms a compressive stress layer. However, too much Na+ content tends to increase the expansion coefficient of the microcrystalline glass and reduce the thermal stability and chemical stability. Therefore, in the present invention, Na+ is preferably used. 2 The mass content of O is 1.0%~2.1%.

[0029] MgO helps to reduce the viscosity of glass and inhibit the crystallization of the matrix glass during molding, and also has the effect of improving low-temperature melting properties. However, if the MgO content is too high, it may cause a decrease in devitrification resistance, and undesirable crystals may be obtained after crystallization, resulting in a decrease in the performance of microcrystalline glass. In the present invention, MgO is an optional component, and therefore, the mass content of MgO is 0% to 1%. ZnO can improve the melting performance of glass and the chemical stability of glass, and is an optional component in the present invention. Therefore, the mass content of ZnO is 0% to 1%, which can inhibit the reduction of devitrification.

[0030] ZrO 2 It is a good crystal nucleating agent for glass. 4+ The field strength of the ions is high, and the surrounding O 2- According to Zr 4+ The coordination number of the Si-O bonds is arranged by the so-called "accumulation". After robbing the free oxygen in the structure, the accumulation will continue to rob the bridging oxygen in the glass skeleton, making the O 2- Ions are more inclined to Zr 4+ , forming Si-O-Zr-O-Si, thus forming accumulation, which will lead to phase separation or crystallization after heat treatment under appropriate conditions. 2 Too much content will make glass melting difficult. Therefore, ZrO is preferred. 2 The mass content is 1.9%~5.6%.

[0031] P 2 O 5It has two functions in glass, namely, mesh repair and phase separation. The mesh repair function is because P 2 O 5 In the glass, [PO 4 ] phosphorus oxygen tetrahedron, which can be combined with [AlO 4 ] The aluminum-oxygen tetrahedron combines with the silicon-oxygen network to play a role in filling the network, increasing the stability of the structure and inhibiting the phase separation of the glass; the phase separation is due to the high coordination number of the phosphide. 5+ The field is so strong that it can destroy the silicon-oxygen tetrahedral structure and capture O 2- Tetrahedrons are formed. During the heat treatment process, they can be separated from the silicate network to promote phase separation. In the phase separation process, the increase in temperature makes the glass components enriched, which further promotes crystallization. 2 O 5 It can also promote ZrO 2 But if P 2 O 5 If the content is too high, it is easy to cause the devitrification resistance to decrease. 2 O 5 The mass content is 2%~2.4%.

[0032] The present invention obtains high-strength transparent microcrystalline glass with relatively large strength and high transmittance by adjusting the above components, and simultaneously obtains microcrystalline glass with uniform crystallization and one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution. The obtained high-strength transparent microcrystalline glass has an average visible light transmittance of more than 85% and a Vickers hardness value of 680 kgf / mm 2 above.

[0033] Specifically, the method for preparing high-strength transparent microcrystalline glass comprises the following steps: (1) Calculate and weigh the raw materials corresponding to each component according to the distribution ratio of each component, and mix the raw materials of each component to obtain a mixed material; (2) placing the mixed material into a melting furnace, raising the temperature to 1300-1400°C at a rate of 10-15°C / min, keeping the temperature for 60-90 min, and then raising the temperature to 1600-1620°C at a rate of 5-7°C / min, keeping the temperature for 4-5 h, casting and molding, and placing the mixture into an annealing furnace at 600-650°C for annealing to obtain a molded glass block; (3) Slicing the formed glass block, grinding and polishing it to obtain a base glass sheet; (4) Place the substrate glass sheet in an annealing furnace, keep it at 680-750°C for 2-4 hours, and then keep it at 760-850°C for 1-3 hours to obtain a microcrystalline glass containing a crystalline phase: (5) After the potassium nitrate solution is heated to 450°C~500°C at a heating rate of 5~8°C / min, the microcrystalline glass containing the crystalline phase is placed in the potassium nitrate solution and kept warm for 4~6 hours. Then, the sodium nitrate solution is heated to 400°C~450°C at a heating rate of 5~8°C / min, and the microcrystalline glass containing the crystalline phase that has passed through the potassium nitrate solution is placed in the sodium nitrate solution and kept warm for 2~4 hours to obtain high-strength transparent microcrystalline glass.

[0034] The implementation process of the present invention is described in detail below in conjunction with specific embodiments.

[0035] In the following examples and comparative examples, the raw materials used are all common commercial products that can be directly purchased or can be prepared according to conventional techniques in the art.

[0036] 1. Embodiment of the method for preparing high-strength transparent glass-ceramics of the present invention Examples 1-8 Embodiments 1-8 all provide high-strength transparent microcrystalline glass; wherein the preparation method of the high-strength transparent microcrystalline glass comprises the following steps: First, according to the proportion of each component in Table 1, the raw materials corresponding to each component are calculated and weighed, and the raw materials of each component are mixed to obtain a mixed material; secondly, the mixed material is placed in a melting furnace, and the mixed material is melted, cast and annealed in a high-temperature lifting furnace to obtain a molded glass block; then, the molded glass block is sliced, ground and polished to obtain a base glass sheet; then, the base glass sheet is placed in an annealing furnace and heat-treated in two steps to obtain a microcrystalline glass containing a crystalline phase; finally, the microcrystalline glass containing a crystalline phase is chemically strengthened in two steps to obtain a high-strength transparent microcrystalline glass; wherein, in the melting step, the heating rate of the first step is 13°C / min; the heating rate of the second step is 6°C / min; in the chemical strengthening step, the heating rate of the first exchange liquid is 6°C / min, and the heating rate of the second exchange liquid is 7°C / min, the first exchange liquid is a potassium nitrate solution, and the second exchange liquid is a sodium nitrate solution.

[0037] Among them, the preparation process of high-strength transparent microcrystalline glass is shown in Table 2.

[0038] Table 1 Ratio of each group of raw materials for high strength transparent microcrystalline glass in Examples 1-8

[0039] Table 2 Preparation process of high-strength transparent microcrystalline glass of Examples 1-8

[0040] 2. Experimental Examples The average visible light transmittance of the substrate glass sheets prepared in Examples 1-8 was tested, and the crystal phase in the microcrystalline glass containing the crystal phase was tested; at the same time, the Vickers hardness before and after the heat treatment and the prepared high-strength transparent microcrystalline glass were tested for Vickers hardness and average visible light transmittance. Specifically, the crystal phase test is to grind the microcrystalline glass containing the crystal phase into powder, and use an X-ray diffractometer to test the type of crystal phase in the microcrystalline glass containing the crystal phase; the Vickers hardness is to test the Vickers hardness of the substrate glass sheet before and after the heat treatment using a Vickers hardness tester; the average visible light transmittance is to use a colorimeter to test the average visible light transmittance.

[0041] The specific test results are shown in Table 3: Table 3 Performance test results during the preparation of Examples 1-8

[0042] It can be seen from Table 3 that the crystal phases in the microcrystalline glass containing crystal phases prepared in the present application include one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution; the average visible light transmittance of the base glass sheet is above 90.1%, and the highest can reach 91.3%; the Vickers hardness before heat treatment is up to 630 kgf / mm 2 , the Vickers hardness after heat treatment is 635 kgf / mm 2 Above, up to 680 kgf / mm 2 The Vickers hardness of the high-strength transparent glass-ceramics prepared in Examples 1-8 is 682 kgf / mm 2 Above, up to 730 kgf / mm 2 ; The average transmittance of visible light is above 85.3%, and can reach up to 90.4%.

[0043] This shows that the high-strength transparent microcrystalline glass provided in the present application can obtain high-strength transparent microcrystalline glass with relatively large strength and high transmittance by controlling the mass percentage range of each raw material, and at the same time obtain a microcrystalline glass that is uniformly crystallized and has one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution. The obtained high-strength transparent microcrystalline glass has an average visible light transmittance of more than 85%, and a Vickers hardness value of 680 kgf / mm 2 above.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-strength transparent microcrystalline glass, characterized in that: Measured by mass percentage, its raw materials include: 62.7%~71.9% SiO2, 8.6%~25.5% Al2O3, 2%~2.4% B2O3, 2.2%~8.6% Li2O, 1.0%~2.1% Na2O, 2%~2.4% P2O5, 1.9%~5.6% ZrO2, 0%~1% ZnO and 0%~1% MgO, wherein the crystalline phases of the high-strength transparent microcrystalline glass include one or more of petalite, β-spodumene, β-eucryptite, and β-quartz solid solution.

2. The high-strength transparent microcrystalline glass according to claim 1, characterized in that: In the raw materials, Al2O3 / Li2O is 1-11.6, and the total mass percentage of P2O5 and ZrO2 is 4%-8%.

3. The high-strength transparent microcrystalline glass according to claim 2, characterized in that: In the raw materials, the total mass percentage of Li2O and Na2O is 4% to 10.7%.

4. The high-strength transparent microcrystalline glass according to claim 3, characterized in that: The raw materials include, by mass percentage, 64.7%~71.9% SiO2, 8.6%~21.2% Al2O3, 2.1%~2.4% B2O3, 4.6%~8.6% Li2O, 1.3%~2.1% Na2O, 2%~2.4% P2O5, 2.1%~5.6% ZrO2, 0.2%~1% ZnO and 0.3%~0.7% MgO, wherein the crystalline phase of the high-strength transparent microcrystalline glass includes one or more of petalite, β-spodumene, β-eucryptite and β-quartz solid solution; Al2O3 / Li2O is 1~4.3, the total mass percentage of P2O5 and ZrO2 is 4.3%~7.8%; the total mass percentage of Li2O and Na2O is 6.1%~10.7%.

5. A method for preparing high-strength transparent microcrystalline glass, characterized in that: The method comprises the following steps: according to the raw materials of the high-strength transparent microcrystalline glass according to any one of claims 1 to 4, the raw materials are sequentially mixed, melted, formed and annealed to obtain a base glass sheet; the base glass sheet is heat-treated to obtain a microcrystalline glass containing a crystalline phase; and the microcrystalline glass containing a crystalline phase is chemically strengthened to obtain a high-strength transparent microcrystalline glass.

6. The method for preparing high-strength transparent glass-ceramics according to claim 5, characterized in that: The melting step comprises: a first step of heating the temperature to 1300-1400° C. at a heating rate of 10-15° C. / min and maintaining the temperature for 60-90 minutes; a second step of heating the temperature to 1600-1620° C. at a heating rate of 5-7° C. / min and maintaining the temperature for 4-5 hours.

7. The method for preparing high-strength transparent glass-ceramics according to claim 5, characterized in that: The annealing temperature is 600-650° C. and the annealing time is 2-2.5 hours.

8. The method for preparing high-strength transparent glass-ceramics according to claim 5, characterized in that: The heat treatment includes a nucleation treatment and a crystallization treatment performed sequentially. The temperature of the nucleation treatment is 680-750° C., and the time of the nucleation treatment is 2-4 hours. The temperature of the crystallization treatment is 760-850° C., and the time of the crystallization treatment is 1-3 hours.

9. The method for preparing high-strength transparent glass-ceramics according to claim 5, characterized in that: The chemical strengthening step includes: heating the first exchange liquid to 450-500°C at a heating rate of 5-8°C / min, placing the microcrystalline glass containing the crystalline phase in the first exchange liquid for 4-6 hours, and then heating the second exchange liquid to 400-450°C at a heating rate of 5-8°C / min, and placing the microcrystalline glass containing the crystalline phase that has passed through the first exchange liquid in the second exchange liquid for 2-4 hours; wherein the first exchange liquid is a potassium nitrate solution, and the second exchange liquid is a sodium nitrate solution.

10. The method for preparing high-strength transparent glass-ceramics according to claim 5, characterized in that: The microcrystalline glass containing a crystalline phase contains a crystal nucleating agent, and the mass of the crystal nucleating agent is 4.2% to 7.8% of the total mass of the high-strength transparent microcrystalline glass raw material.

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