High-transmittance and high-strength nanocrystalline glass as well as preparation method and application thereof

Abstract

The invention discloses high-transmittance and high-strength nanocrystalline glass, a preparation method thereof and application of the high-transmittance and high-strength nanocrystalline glass in preparation of glass devices or electronic equipment. The high-transmittance and high-strength nanocrystalline glass is transparent lithium magnesium aluminum silicate nanocrystalline glass with uniform nanocrystals; the nanocrystal comprises a LiAl (SiO3) 2 crystal and a Mg2Al4Si5O18 crystal, and the LiAl (SiO3) 2 crystal and the The size of the nanocrystal is 4-5nm; the Vickers hardness of the high-transmittance and high-strength nanocrystalline glass is larger than 910 HV, and the light transmittance of 550 nm under the thickness of 2 mm is larger than 88%. The preparation method comprises the following steps: uniformly mixing the raw materials of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO and SnO2 to obtain a batch; melting the batch, molding and annealing to obtain a glass block; cutting and polishing the glass block to obtain base glass; and processing the base glass by a two-step heat treatment process to obtain the high-transmittance and high-strength nanocrystalline glass.

Description

Technical Field

[0001] The present invention relates to the field of nanocrystalline glass, and in particular to a high-transmittance and high-strength nanocrystalline glass and a preparation method and application thereof. Background Art

[0002] As an important functional material, cover glass is widely used in consumer electronics, automobiles, construction, medical and other fields, especially in electronic products such as smartphones, tablets, wearable devices, etc., where cover glass directly determines the product's appearance, texture, durability and user experience. As electronic devices develop towards thinness, flexibility and high performance, the performance requirements for cover glass are also getting higher and higher, such as high light transmittance, high strength, scratch resistance, impact resistance, weather resistance, etc.

[0003] Traditional cover glass is mostly made of soda-lime glass or aluminosilicate glass, and its surface hardness and impact resistance are improved through chemical strengthening (such as ion exchange). However, the mechanical properties of traditional glass have limited room for improvement and it is difficult to meet the higher requirements of high-end electronic devices for cover glass.

[0004] In recent years, nanocrystalline cover glass has received widespread attention as a new type of material. Nanocrystalline cover glass significantly improves the mechanical properties, thermal stability and functional characteristics of the material by introducing nano-scale crystals into the glass matrix. The presence of nanocrystals can not only improve the hardness and toughness of the glass, but also achieve functional design by regulating the type and distribution of crystals, such as enhancing anti-blue light, anti-ultraviolet, and antibacterial properties. In addition, while maintaining high light transmittance, nanocrystalline cover glass can achieve a lighter and thinner design to meet the demand for lighter and thinner electronic devices.

[0005] At present, the preparation technologies of nanocrystalline cover glass mainly include melt-quenching method, sol-gel method, vapor deposition method, etc. Among them, the melt-quenching method is the most commonly used method, which is to melt the glass raw materials at high temperature and then cool them quickly, and then heat treat them to make the nanocrystals precipitate evenly. However, this method has high requirements on process conditions, the crystal size and distribution are difficult to accurately control, and it is easy to cause the glass transmittance to decrease. Although the sol-gel method can achieve uniform dispersion of nanocrystals, the preparation cycle is long and the cost is high, which is difficult to meet the needs of large-scale production. The vapor deposition method is mainly used for the preparation of thin film materials, and it is difficult to achieve large-scale production of large-size cover glass.

[0006] In addition, the functional design of nanocrystalline cover glass in the existing technology still faces many challenges. For example, how to achieve the multifunctionality of the material by regulating the type, size and distribution of crystals; how to further improve the mechanical properties and thermal stability of the material while maintaining high light transmittance; how to achieve low-cost, high-efficiency large-scale production, etc. These problems limit the widespread application of nanocrystalline cover glass in high-end electronic devices.

[0007] Therefore, developing a new type of nanocrystalline cover glass and its preparation method, which can achieve precise control of crystal size and distribution, while having high light transmittance, high strength, multifunctionality, and good processing performance, has important scientific significance and application value. The present invention aims to solve the above technical problems and provide an innovative nanocrystalline cover glass material and its preparation process to meet the demand for high-performance cover glass in fields such as consumer electronics, automotive, and architecture. Summary of the Invention

[0008] The present invention provides a high-transmission and high-strength nanocrystalline glass, its preparation method, and application. The nanocrystalline glass of the present invention has a relatively high intrinsic strength. Through a two-step heat treatment method, crystals with a uniform size of 4 - 5 nanometers can be formed in the glass, obtaining a nanocrystalline glass with excellent fracture resistance and high Vickers hardness.

[0009] The specific technical solutions are as follows:

[0010] [1] A high-transmission and high-strength nanocrystalline glass, which is a transparent lithium magnesium aluminum silicate nanocrystalline glass with uniform nanocrystals;

[0011] The nanocrystals include LiAl(SiO 3 ) 2 crystals (PDF#31 - 0706) and Mg 2 Al 4 Si 5 O 18 crystals (PDF#14 - 0249);

[0012] The size of the nanocrystals is 4 - 5 nm;

[0013] The Vickers hardness of the high-transmission and high-strength nanocrystalline glass is greater than 910 HV, further greater than 925 HV, and the light transmittance at 550 nm with a thickness of 2 mm is greater than 88%, further greater than 89.5%.

[0014] In some embodiments, for the high-transmission and high-strength nanocrystalline glass, the nanocrystals further include at least one of Li x Al x Si 1-x O 2 crystals (PDF#40 - 0073), MgAl 2 Si 3 O 10 crystals (PDF#25 - 0511), where 0 < x ≤ 0.2. The Li x Al x Si 1-x O 2 crystals, the MgAl 2Si 3 O 10 The crystal is the LiAl(SiO 3 ) 2 Crystal, the Mg 2 Al 4 Si 5 O 18 Precursor crystal of crystal.

[0015] The inventors have limited the content range of each component in the high-transmittance and high-strength nanocrystalline glass provided by the present invention based on the following considerations:

[0016] 1. SiO 2 It is the core component of nanocrystalline glass. As a glass network former, it builds a stable three-dimensional silicon-oxygen tetrahedral network structure, providing a basic skeleton for glass. 2 It not only adjusts the melting temperature, viscosity and forming properties of glass, but also affects the nucleation and growth of crystals, inhibits excessive crystal growth, and forms a uniform microcrystalline structure. In addition, it significantly improves the chemical stability, mechanical strength, hardness and wear resistance of glass, while optimizing optical properties such as transmittance and refractive index. 2 O 3 With the synergistic effect of Al, alkali metal oxides and other components, silicon oxide further optimizes the network structure and performance of glass, making nanocrystalline glass able to meet the high-end application requirements in various fields. 2 O 3 The proportion of oxides such as alkali metals, in terms of molar percentage, in the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is SiO 2 The suitable range is 60% to 66%, preferably 62% to 66%, and more preferably 63% to 65%.

[0017] 2. Al 2 O 3 In nanocrystalline glass, aluminum oxide enters the glass network in the form of tetrahedron or octahedron, significantly enhancing the structural stability and density of the glass. It can improve the hardness, compressive strength, wear resistance and scratch resistance of the glass, while improving the chemical stability and making it resistant to acid, alkali and water. In addition, Al 2 O 3 It can adjust the melting and crystallization behavior of glass, promote crystal nucleation and growth, and optimize thermal properties, such as reducing the thermal expansion coefficient and improving thermal shock resistance. 2 The synergistic effect of the components, Al 2 O 3 The comprehensive performance of nanocrystalline glass is further improved, considering the reduction of Al 2 O 3The negative effects of the invention are retained, and the Al content of the composition of the high-transmittance and high-strength nanocrystalline glass of the invention is calculated by mole percentage. 2 O 3 The suitable range is 4% to 8%, preferably 5% to 7%, and more preferably 6% to 7%.

[0018] 3. B 2 O 3 As a flux in nanocrystalline glass, it significantly reduces the melting temperature and high-temperature viscosity, and improves the melting and forming properties. It enters the glass network in the form of boron oxide triangles or tetrahedrons, and reacts with SiO 2 The synergistic formation of a stable hybrid network structure reduces the thermal expansion coefficient and improves thermal shock resistance and chemical stability. 2 O 3 It helps to regulate crystal nucleation and growth, promote the formation of uniform microcrystalline structure, and optimize optical properties, such as reducing refractive index and improving transmittance. 2 、Al 2 O 3 The synergistic effect of the components, B 2 O 3 The comprehensive performance of the nanocrystalline glass is further improved. In terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is B 2 O 3 The appropriate range is 2% to 6%, preferably 2% to 5%, and more preferably 2% to 4%.

[0019] 4. Na 2 O is a glass network outer oxide. 2 O can provide free oxygen, increase the O / Si ratio in the glass structure, and cause the silicon-oxygen network to break bonds, thereby significantly reducing the viscosity of the glass and making it easier to melt. It is an excellent flux. 2 O is a key ingredient in chemical strengthening (ion exchange) processes. However, Na 2 The introduction of O will increase the thermal expansion coefficient of glass and reduce its thermal stability, chemical stability and mechanical strength. 2 The use of O can reduce the crystallization activation energy and crystallization temperature of glass, but at the same time it will weaken the crystallization ability of glass, resulting in an increase in residual glass phase. Therefore, it is necessary to strictly control Na 2 The amount of O introduced is small to avoid negative impact on material properties. In terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is Na 2 The suitable range of O is 0.05% to 4%, preferably 0.05% to 3%, and more preferably 1% to 3%.

[0020] 5. Li 2O acts as a strong flux in nanocrystalline glass, significantly reducing the melting temperature and viscosity, and improving the melting and forming properties. + Ions break down SiO 2 The network structure enhances the fluidity of the glass, while promoting ion exchange strengthening, forming a compressive stress layer on the glass surface, and improving mechanical strength and scratch resistance. 2 O can also reduce the thermal expansion coefficient, improve thermal shock resistance, and promote the nucleation and growth of crystals, optimizing optical properties such as increasing light transmittance and reducing refractive index. 2 、Al 2 O 3 The synergistic effect of the components, Li 2 O further improves the comprehensive performance of nanocrystalline glass. In terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is Li 2 The suitable range of O is 8% to 16%, preferably 9% to 15%, and more preferably 10% to 15%.

[0021] 6. MgO is used as a network modifier in nanocrystalline glass to reduce high temperature viscosity, improve melting and forming performance, and enhance the network stability and density of the glass. MgO significantly improves mechanical properties by increasing hardness, compressive strength and flexural strength, and reduces the thermal expansion coefficient and enhances thermal shock resistance, making it suitable for high temperature environments. In addition, MgO can be used as a nucleating agent or crystal component to promote the nucleation and growth of crystals and regulate the crystal structure. By reacting with SiO 2 、Al 2 O 3 The synergistic effect of other components, MgO further optimizes the comprehensive performance of the nanocrystalline glass. In terms of molar percentage, the suitable range of MgO in the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is between 4% and 10%, preferably 5% to 10%, and further preferably 5% to 8%.

[0022] 7. ZrO 2 In nanocrystalline glass, ZrO enters the glass network in the form of tetrahedron or octahedron, significantly enhancing the stability and density of the glass, while increasing hardness, compressive strength, bending strength and fracture toughness, and improving mechanical properties. As a strong nucleating agent, ZrO 2 It promotes the nucleation and growth of crystals, regulates the crystal structure, reduces the thermal expansion coefficient, and enhances thermal shock resistance. 2 It can also improve the chemical stability and refractive index of glass, making it suitable for harsh environments and high-refractive-index optical devices. 2 、Al 2 O 3 The synergistic effect of the components, zirconium oxide further optimizes the comprehensive performance of the nanocrystalline glass. In terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is ZrO2 The appropriate range is 2% to 5%, preferably 3% to 5%, and more preferably 3% to 4%.

[0023] 8. ZnO is used as a flux in nanocrystalline glass to reduce melting temperature and high temperature viscosity, improve melting and forming properties. 2+ Ions enter the glass network to enhance the stability and density of the glass. ZnO significantly improves mechanical properties by increasing hardness, compressive strength and flexural strength, and reduces the thermal expansion coefficient and enhances thermal shock resistance. In addition, ZnO can be used as a nucleating agent or crystal component to promote the nucleation and growth of crystals, regulate the crystal structure, and at the same time improve the light transmittance and optimize the optical properties. In terms of molar percentage, the suitable range of ZnO in the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is between 0.05% and 3%, preferably between 1% and 3%, and more preferably between 1% and 2%.

[0024] 9. SnO 2 It is a network former and one of the clarifiers. SnO 2 Decomposition at high temperature produces O 2 The gas floats up with the small bubbles that cannot float up by their own tension during the glass transition stage, which has a good effect on eliminating medium-sized bubbles. 2 The empirical value of the content of SnO is generally low, but since the raw materials of this component contain a high proportion of carbonate raw materials, a large amount of gas substances will be produced. According to the experimental results, in terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass of the present invention is 2 The suitable range of is 0.05% to 2%, preferably 0.5% to 1.5%, and more preferably 1% to 1.5%.

[0025] In some embodiments, the high-transmittance and high-strength nanocrystalline glass comprises, in terms of molar percentage, the following components:

[0026] 60% to 66%, preferably 62% to 66%, more preferably 63% to 65% SiO 2 ,

[0027] 4% to 8%, preferably 5% to 7%, more preferably 6% to 7% Al 2 O 3 ,

[0028] 2% to 6%, preferably 2% to 5%, more preferably 2% to 4% B 2 O 3 ,

[0029] 0.05% to 4%, preferably 0.05% to 3%, more preferably 1% to 3% of Na 2 Oh,

[0030] 8% to 16%, preferably 9% to 15%, more preferably 10% to 15% Li 2 Oh,

[0031] 4% to 10%, preferably 5% to 10%, more preferably 5% to 8% MgO,

[0032] 2% to 5%, preferably 3% to 5%, more preferably 3% to 4% ZrO 2 ,

[0033] 0.05% to 3%, preferably 1% to 3%, more preferably 1% to 2% ZnO,

[0034] 0.05% to 2%, preferably 0.5% to 1.5%, more preferably 1% to 1.5% SnO 2 .

[0035] In some preferred embodiments, the composition of the high-transmittance and high-strength nanocrystalline glass is Li 2 O accounts for M1, MgO accounts for M 2 The relationship is satisfied: M1>M2 and 12%<M1+M2≤18%.

[0036] In some embodiments, in the composition of the high-transmittance and high-strength nanocrystalline glass, SiO 2 、Al 2 O 3 , B 2 O 3 、Na 2 O. Li 2 O, MgO, ZrO 2 , ZnO and SnO 2 The sum of the mole percentages is 100%.

[0037] The high-transmittance and high-strength nanocrystalline glass of the present invention can be used to prepare high-performance microcrystalline cover glass.

[0038] [2] The method for preparing the high-transmittance and high-strength nanocrystalline glass according to [1] comprises:

[0039] SiO 2 、Al 2 O 3 , B 2 O 3 、Na 2 O. Li 2 O, MgO, ZrO 2 , ZnO and SnO 2 The raw materials are mixed to obtain a batch material;

[0040] The batch material is melted, formed, and then annealed to obtain a glass block;

[0041] Cutting and polishing the glass block to obtain basic glass;

[0042] The base glass is subjected to a two-step heat treatment process to obtain the high-transmittance and high-strength nanocrystalline glass;

[0043] The two-step heat treatment process comprises:

[0044] The first step is heat treatment, the heat treatment temperature is glass transition temperature Tg + (30 ~ 50) ° C, preferably glass transition temperature Tg + (30 ~ 35) ° C, and the heat treatment time is greater than 10 hours;

[0045] The second step is heat treatment, the heat treatment temperature is the glass crystallization peak temperature Tc-(100~60)℃, preferably the glass crystallization peak temperature Tc-(75~60)℃, and the heat treatment time is less than 1h.

[0046] SiO 2 The raw materials can be quartz sand, etc. 2 O 3 The raw materials can be aluminum hydroxide, etc. 2 O 3 The raw materials can be boron oxide, etc., Na 2 The raw materials of O can be sodium carbonate, etc. 2 The raw material of O can be lithium carbonate, etc., the raw material of MgO can be magnesium oxide, etc., and the raw material of ZrO 2 The raw material of can be zirconium oxide, etc., the raw material of ZnO can be zinc oxide, etc., and the raw material of SnO 2 The raw material can be tin dioxide or the like.

[0047] In some embodiments, in the method for preparing the high-transmittance and high-strength nanocrystalline glass, the melting temperature can be 1580-1620°C, such as 1600°C, and the insulation time can be 1.5-3h, such as 2h.

[0048] In some embodiments, in the method for preparing the high-transmittance and high-strength nanocrystalline glass, the annealing temperature can be 550-610°C, such as 560°C, and the insulation time can be 1.5-2.5h, such as 2h.

[0049] In some embodiments, in the method for preparing the high-transmittance and high-strength nanocrystalline glass, the polishing may be performed by chemical mechanical polishing. Further, the polishing may contain CeO 2 The polishing liquid is a mixture of CeO 2 The mass ratio to water is greater than or equal to 1:5.

[0050] [3] Application of the high-transmittance and high-strength nanocrystalline glass according to [1] in the preparation of glass devices or electronic devices.

[0051] [4] A glass device comprising the high-transmittance and high-strength nanocrystalline glass described in [1].

[0052] [5] An electronic device comprising the high-transmittance and high-strength nanocrystalline glass described in [1].

[0053] Compared with the prior art, the present invention has the following beneficial effects:

[0054] 1) Due to its high aluminum oxide content, traditional cover glass has the disadvantages of high melting point, difficult molding, easy to form defects, high brittleness, limited chemical strengthening effect, low light transmittance, high processing difficulty, high cost and high thermal expansion coefficient, which limits its application in certain fields. Therefore, in the glass component formula of the present invention, the aluminum oxide content is relatively low to change the material properties.

[0055] 2) In the glass component formula of the present invention, relatively high contents of lithium oxide and magnesium oxide are present at the same time, which provides more possibilities for the types of crystals in the formed microcrystalline cover glass. Meanwhile, the presence of alkali metal lithium and sodium provides the possibility for subsequent one-step or two-step chemical strengthening.

[0056] 3) Through the analysis of the crystallization thermodynamics of the base glass, a more reasonable and reliable heat treatment process step is set up to control the crystal precipitation and achieve uniform nanocrystal distribution. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 This is a transmission electron microscope photograph of the high-transmittance and high-strength nanocrystalline glass in Example 1.

[0058] Figure 2 This is the X-ray diffraction (XRD) spectrum of the high-transmittance and high-strength nanocrystalline glass of Example 1.

[0059] Figure 3 This is a transmittance curve of the high-transmittance and high-strength nanocrystalline glass of Example 1. DETAILED DESCRIPTION

[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific examples. It should be understood that these examples are only intended to illustrate the present invention and are not intended to limit the scope of the present invention. The operating methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturer.

[0061] A high-strength and high-transmittance nanocrystalline glass, the glass raw materials used include quartz sand, boron oxide, aluminum hydroxide, magnesium oxide, sodium carbonate, lithium carbonate, zinc oxide, zirconium oxide, and tin dioxide. In Examples 1-6, the melting is performed and other characterization methods are used to determine the volatile amount of the components, and then the percentage of the raw materials is adjusted to make the final molar percentage of the components reach the expected value of the component ratio in Table 1.

[0062] The nanocrystalline glasses of Examples 1 to 6 are all prepared by the following steps:

[0063] (1) SiO 2 , Al 2 O 3 , B 2 O 3 , Na 2 O, Li 2 O, MgO, ZrO 2 , ZnO, SnO 2 The raw material powders are mixed uniformly according to the nano glass crystal component proportions in Table 1, and sieved to obtain a batch material.

[0064] (2) The batch material is melted in a platinum crucible at a melting temperature of 1600° C. for 2 hours. The glass is poured into a mold to obtain a glass block.

[0065] (3) The glass blocks are placed in a muffle furnace for annealing at a temperature of 560°C for 2 hours.

[0066] (4) cutting and polishing the glass block obtained by annealing in step (3), wherein a chemical mechanical polishing method is used to polish the glass block with CeO 2 The mixture with water is the polishing liquid, in which CeO 2 The mass ratio of the raw material to water is 1:5 to obtain basic glass.

[0067] (5) The above-mentioned basic glass is subjected to a two-step heat treatment process, wherein the first step heat treatment temperature is the glass transition temperature Tg + (30-50) °C, and the treatment time is greater than 10 hours, and the second step heat treatment temperature is the glass crystallization peak temperature Tc - (100-60) °C, and the treatment time is less than 1 hour, to obtain nanocrystalline glass.

[0068] The preparation method of comparative example 1 is the same as that of example 1, except that step (5) adopts a one-step heat treatment process, the temperature is the crystallization peak temperature Tc-(100~60)℃, and the molar percentage of the components of the prepared nanocrystalline glass and the specific process parameter conditions are shown in Table 1.

[0069] The glasses obtained in Examples 1 to 6 and Comparative Example 1 were subjected to performance tests, wherein the Vickers hardness was measured using a micro Vickers hardness tester; the transmittance was measured using an ultraviolet spectrophotometer to test the transmittance of a 10 mm × 10 mm × 2 mm glass sheet at a wavelength of 550 nm; the glass transition temperature and the glass crystallization peak temperature were measured using a DSC differential scanning calorimeter on the ground base glass, and the results are shown in Table 2.

[0070] Table 1 Molar percentage of glass components and specific process parameters

[0071]

[0072] Table 2 Glass properties

[0073] performance Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparative Example 1 Vickers hardness (HV) 940 932 926 915 918 923 907 550nm transmittance (%) 90.2 90.1 89.7 89.2 88.9 89.5 60.7 Glass transition temperature(℃) 604 604 604 590 593 610 604 Crystallization peak temperature (℃) 802 802 802 819 827 835 802

[0074] Figure 1 This is a transmission electron microscope photo of the high-transmittance and high-strength nanocrystalline glass in Example 1. Figure 1 It can be seen that in Example 1, uniform nanocrystals with a size of 4 to 5 nm were precipitated.

[0075] Figure 2 The XRD spectrum of the high-transmittance and high-strength nanocrystalline glass of Example 1 is shown in FIG. Figure 2 It can be seen that mixed polycrystals are precipitated in the glass, and the main crystal types are LiAl(SiO 3 ) 2 Crystals and Mg 2 Al 4 Si 5 O 18 Crystals, including LiAl(SiO 3 ) 2 Crystals and Mg 2 Al 4 Si 5 O 18 Crystal precursor Li x Al x Si 1-x O 2 and MgAl 2 Si 3 O 10 , 0 <x≤0.2。

[0076] Figure 3 The transmittance curve of the high-transmittance and high-strength nanocrystalline glass of Example 1 is shown in FIG. Figure 3 It can be seen that the transmittance of nanocrystalline glass at a wavelength of 550nm is 90.2%.

[0077] In addition, it should be understood that after reading the above description of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A high-transmittance and high-strength nanocrystalline glass, characterized in that: It is a transparent lithium magnesium aluminum silicate nanocrystalline glass with uniform nanocrystals; The nanocrystals include LiAl(SiO3)2 crystals and Mg2Al4Si5O 18 Crystals; The size of the nanocrystals is 4 to 5 nm; The Vickers hardness of the high-transmittance and high-strength nanocrystalline glass is greater than 910 HV, further greater than 925 HV, and the light transmittance at 550 nm at a thickness of 2 mm is greater than 88%, further greater than 89.5%.

2. The high-transmittance and high-strength nanocrystalline glass according to claim 1, characterized in that: The nanocrystals also include Li x Al x Si 1-x O2 crystal, MgAl2Si3O 10 At least one of the crystals, 0 <x≤0.2。 3. The high-transmittance and high-strength nanocrystalline glass according to claim 1 or 2, characterized in that: In terms of molar percentage, the composition of the high-transmittance and high-strength nanocrystalline glass includes: 60% to 66%, preferably 62% to 66%, more preferably 63% to 65% SiO2, 4% to 8%, preferably 5% to 7%, more preferably 6% to 7% Al2O3, 2% to 6%, preferably 2% to 5%, more preferably 2% to 4% B2O3, 0.05% to 4%, preferably 0.05% to 3%, more preferably 1% to 3% of Na2O, 8% to 16%, preferably 9% to 15%, more preferably 10% to 15% Li2O, 4% to 10%, preferably 5% to 10%, more preferably 5% to 8% MgO, 2% to 5%, preferably 3% to 5%, more preferably 3% to 4% ZrO2, 0.05% to 3%, preferably 1% to 3%, more preferably 1% to 2% ZnO, 0.05% to 2%, preferably 0.5% to 1.5%, and more preferably 1% to 1.5% SnO2.

4. The high-transmittance and high-strength nanocrystalline glass according to claim 3, characterized in that: In terms of molar percentage, the proportion M1 of Li2O and the proportion M2 of MgO in the composition of the high-transmittance and high-strength nanocrystalline glass satisfy the relationship: M1>M2 and 12%<M1+M2≤18%.

5. The high-transmittance and high-strength nanocrystalline glass according to claim 3, characterized in that: In the composition of the high-transmittance and high-strength nanocrystalline glass, the sum of the molar percentages of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO and SnO2 is 100%.

6. The method for preparing high-transmittance and high-strength nanocrystalline glass according to any one of claims 1 to 5, characterized in that: include: The raw materials of SiO2, Al2O3, B2O3, Na2O, Li2O, MgO, ZrO2, ZnO and SnO2 are mixed to obtain a batch material; The batch material is melted, formed, and then annealed to obtain a glass block; Cutting and polishing the glass block to obtain basic glass; The base glass is subjected to a two-step heat treatment process to obtain the high-transmittance and high-strength nanocrystalline glass; The two-step heat treatment process comprises: The first step is heat treatment, the heat treatment temperature is glass transition temperature Tg + (30 ~ 50) ° C, preferably glass transition temperature Tg + (30 ~ 35) ° C, and the heat treatment time is greater than 10 hours; The second step is heat treatment, the heat treatment temperature is the glass crystallization peak temperature Tc-(100~60)℃, preferably the glass crystallization peak temperature Tc-(75~60)℃, and the heat treatment time is less than 1h.

7. The preparation method according to claim 6, characterized in that: The raw material of SiO2 is quartz sand, the raw material of Al2O3 is aluminum hydroxide, the raw material of B2O3 is boron oxide, the raw material of Na2O is sodium carbonate, the raw material of Li2O is lithium carbonate, the raw material of MgO is magnesium oxide, the raw material of ZrO2 is zirconium oxide, the raw material of ZnO is zinc oxide, and the raw material of SnO2 is tin dioxide; The melting temperature is 1580-1620°C and the holding time is 1.5-3h; The annealing temperature is 550-610°C, and the holding time is 1.5-2.5h; The polishing adopts a chemical mechanical polishing method; The polishing process uses a mixture of CeO2 and water as a polishing liquid; the mass ratio of CeO2 to water in the polishing liquid is greater than or equal to 1:

5.

8. Use of the high-transmittance and high-strength nanocrystalline glass according to any one of claims 1 to 5 in the preparation of glass devices or electronic devices.

9. A glass device, characterized in that: Including the high-transmittance and high-strength nanocrystalline glass as described in any one of claims 1 to 5.

10. An electronic device, characterized in that: Including the high-transmittance and high-strength nanocrystalline glass as described in any one of claims 1 to 5.

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