Aluminum-tantalum oxide glass with high hardness, high Young's modulus and ultra-high refractive index, preparation method and application thereof

Abstract

The present invention relates to an aluminum-tantalum oxide glass with high hardness, high Young's modulus, and ultra-high refractive index, as well as a preparation method and application thereof. The aluminum-tantalum oxide glass comprises: 25-32 mol% Al2O3, 30-36 mol% Ta2O5, 5-12 mol% ZrO2, 5-15 mol% of a first metal oxide, and 5-15 mol% of a second metal oxide, with the total molar sum of the components being 100 mol%. The first and second metal oxides are selected from two of the group consisting of Gd2O3, La2O3, Sc2O3, Tm2O3, Lu2O3, Yb2O3, HfO2, Nb2O5, and Ga2O3.

Description

Technical Field

[0001] The present invention relates to an aluminum-tantalum oxide glass and a preparation method and application thereof, and in particular to an oxide high-entropy glass with Al2O3 and Ta2O5 as main components and a preparation method and application thereof, belonging to the field of glass materials. Background Art

[0002] Glass with high hardness, high Young's modulus, and high refractive index plays an important role in our daily lives, such as cover materials for electronic products, optical components, AR / VR / MR devices, etc. The aluminum-tantalum high-entropy glass of the present invention has the characteristics of high density, high hardness, high Young's modulus, high transmittance, and high refractive index. When used as a cover material, the thickness can be greatly reduced to make it thinner, and when used as a window material, a wider field of view can be obtained. This glass can effectively improve the drop resistance and wear resistance of smart device screens, reduce screen thickness, reduce device volume, increase transmittance and improve visual effects. In optical prisms, optical lenses, AR / VR / MR devices, it can improve the drop resistance and wear resistance of devices and increase the field of view. It has great application value in electronic equipment modification materials and precision optical instruments.

[0003] The concept of high entropy first appeared in alloy materials. High entropy alloys are alloy systems with 5 or more components in equal atomic ratios. They exhibit four prominent effects: high mixing entropy effect, hysteresis diffusion effect, lattice distortion effect and cocktail effect.

[0004] The high mixing entropy effect favors the formation of simple face-centered cubic (FCC) or body-centered cubic (BCC) structures. The delayed diffusion effect refers to the phenomenon in which phase separation is suppressed during the solidification process of high-entropy alloys (HEAs) and delayed until low temperatures. In the molten state, the atoms of the constituents are in a chaotic state. This orderly, coordinated diffusion inevitably hinders atomic diffusion and inhibits nucleus growth. The structural lattice distortion effect alters the physical and chemical properties of HEAs. Severe lattice distortion hinders atomic diffusion and dislocation movement, enhancing their mechanical properties. The cocktail effect, a property-specific effect, was first proposed by Indian scholar Ranganathan, who posited that the fundamental properties of the constituents and their interactions contribute to the diverse and complex properties of HEAs. Because the repetitive and complex nature of this "cocktail" adjustment hindered the design and application of HEAs, many researchers have dedicated themselves to theoretically proving this phenomenon, thereby scientifically designing HEAs to achieve superior properties such as high hardness, high-temperature resistance, corrosion resistance, and oxidation resistance.

[0005] The existing technology still mainly uses a large number of glass-forming oxides (SiO2, B2O3, P2O5, etc.). Although these low dissociation energy oxides have greatly improved the glass-forming ability, they have caused certain limitations on the mechanical and optical properties of the glass. For example, Chinese Patent 1 (Publication No. CN115010363A) discloses a high-refractive index glass composition and a high-refractive index glass and its preparation method, application and process. The high-refractive index glass composition in the invention comprises, in terms of mass fraction, 3%-50% SiO2, 0%-18% Na2O, 1%-15% K2O, 0.5%-7% Al2O3, 0.5%-7% MgO, 0%-4% CaO, 0.5%-3% SrO, 3.5%-25% BaO, 0 The glass composition comprises 0.01%-7% ZnO, 0.01%-7% B₂O₃, 0.5%-17% Nb₂O₅, 0.01%-2% Gd₂O₃, 1%-10% ZrO₂, 0.5%-13% Li₂O, 5%-43% TiO₂, 0.01%-9% La₂O₃, and 0%-3% Bi₂O₃. The components of this glass composition work synergistically to overcome the problem of increased glass density found in existing high-refractive-index glasses. However, this invention utilizes a large amount of glass-forming oxides, which results in insufficient mechanical properties. For example, although Chinese Patent No. 2 (Publication No. CN112876067A) discloses a high-hardness, high-Young's modulus oxide high-entropy glass, the maximum hardness of this high-entropy glass reaches 12.58 GPa, while the maximum Young's modulus reaches only 177.9 GPa. Moreover, the above-mentioned high entropy glass contains a variety of colored metal oxides such as TiO2, Sm2O3, etc., which makes the preparation conditions for making colorless transparent glass more stringent, limiting its application in optical materials. Summary of the Invention

[0006] To this end, the present invention provides an aluminum-tantalum oxide glass and a preparation method and application thereof.

[0007] In a first aspect, the present invention provides an aluminum-tantalum oxide glass, wherein the aluminum-tantalum oxide glass comprises: 25-32 mol% Al2O3, 30-36 mol% Ta2O5, 5-12 mol% ZrO2, 5-15 mol% first metal oxide, and 5-15 mol% second metal oxide, the total molar sum of the components being 100 mol%;

[0008] The first metal oxide and the second metal oxide are selected from two of Gd2O3, La2O3, Sc2O3, Tm2O3, Lu2O3, Yb2O3, HfO2, Nb2O5 and Ga2O3.

[0009] In order to obtain a glass with excellent mechanical and optical properties, and to apply it to smart electronic devices, AR / VR / MR devices, optical prisms, and optical lenses, the inventors need the glass to have properties such as colorless transparency, high refractive index, high transmittance, high hardness, and high Young's modulus. Therefore, the inventors creatively selected oxides that do not contain colored metal ions (excluding TiO2, Sm2O3, etc., see Comparative Example 3), specifically: high-field strength ions such as Al, Ta, and Zr are selected to increase the glass packing density to improve the mechanical properties of the glass; Ta2O5 high-refractive oxide is selected to increase the refractive index of the glass, and Ta2O5 can also improve the anti-devitrification ability of the glass; network modifiers such as La, Gd, Sc, Tm, and Lu are selected to adjust the glass network structure, and the concept of high-entropy materials is introduced into the oxide glass to further improve the comprehensive performance of the glass through the cocktail effect of high-entropy materials.

[0010] Furthermore, the inventors selected oxides with high dissociation energies and high bulk densities to impart Young's modulus and high hardness to the glass, thus selecting Al2O3, ZrO2, and Ta2O5 as the main constituents of the glass. Since oxides such as La2O3, Sc2O3, Tm2O3, Lu2O3, and Gd2O3 exhibit high dissociation energies and bulk densities in modified forms, any two of these oxides can be added to the glass in combination to enhance its optical properties and glass-forming ability. Therefore, the inventors creatively selected Ta2O5, ZrO2, Al2O3, Gd2O3, and two of La2O3, Sc2O3, Tm2O3, and Lu2O3 as the first and second oxides, utilizing a variety of high dissociation energy oxides to prepare aluminum-tantalum high-entropy glass.

[0011] Taking the concept of high entropy into consideration, the inventors first controlled the molar percentage of each component to be within the range of 5%-36%. In addition, the selected Ta2O5, ZrO2, and Al2O3 all have high dissociation energies, which help to increase the packing density of the oxide glass so that the glass has high hardness and high Young's modulus. The selected Ta2O5 is a high refractive index oxide and Ta 5+Having a high field strength helps to improve the performance requirements of the glass, such as the refractive index, and is controlled as close to the equimolar ratio as possible. However, the present inventors found through research (see Comparative Example 2) that the resulting aluminum-tantalum oxide precipitates a crystalline phase to form a ceramic. The main reason for the formation of ceramics is that the low viscosity of the melt makes it easier for atoms to rearrange, which is conducive to the growth of grains and leads to crystallization. The present inventors further controlled and increased the content of Ta2O5, ZrO2, and Al2O3, and reduced the content of La2O3, Sc2O3, Tm2O3, Lu2O3, etc. to 16 mol% (see Comparative Example 1), and found that the resulting aluminum-tantalum oxide was still a ceramic. Therefore, the present inventors further reduced the content of La2O3, Sc2O3, Tm2O3, Lu2O3, etc. to 5-15 mol%, and found that the resulting aluminum-tantalum oxide formed a glass phase.

[0012] Preferably, the aluminum-tantalum oxide glass is in an amorphous phase; and the molar ratio of the first metal oxide to the second metal oxide is 1:3 to 3:1.

[0013] Preferably, the aluminum-tantalum oxide glass comprises: 30-32 mol% Al2O3, 34-36 mol% Ta2O5, 10-12 mol% ZrO2, 10-12 mol% of the first metal oxide, and 10-12 mol% of the second metal oxide, with the total molar sum of these components being 100 mol%. When the glass contains these components, the configurational entropy of the glass can reach 1.44R-1.6R. Leveraging the cocktail effect of high-entropy materials, high hardness, high Young's modulus, high transmittance, and ultra-high refractive index can be achieved. In summary, after extensive experimental research, the inventors have found that only when the glass composition meets the requirements of "Al2O3 30-32mol%, Ta2O5 34-36mol%, ZrO2 5-12mol%, first metal oxide 10-12mol%, second metal oxide 10-12mol%, and the total molar sum of all components is 100mol%" can it simultaneously meet the properties of high hardness, high Young's modulus, high transmittance, and ultra-high refractive index.

[0014] Preferably, the Young's modulus of the aluminum-tantalum oxide glass is ≥180 GPa, preferably ≥183 GPa;

[0015] The Vickers hardness of the aluminum-tantalum oxide glass is ≥9.0 GPa;

[0016] The configurational entropy of the aluminum-tantalum oxide high-entropy glass is in the range of 1.29R to 1.50R.

[0017] The maximum transmittance of the aluminum-tantalum oxide glass in the visible light range of 400nm to 800nm ​​is greater than 76%;

[0018] The refractive index of the aluminum tantalum oxide glass is greater than 2.0.

[0019] In a second aspect, the present invention provides a method for preparing aluminum-tantalum oxide glass, comprising:

[0020] (1) weighing ZrO2 powder, Al2O3 powder, Ta2O5 powder, a first metal oxide powder, and a second metal oxide powder according to the composition of the aluminum-tantalum oxide glass and mixing them to obtain a mixed powder;

[0021] (2) The obtained mixed powder is pressed into a glass raw material block, and then subjected to a melting-solidification process to obtain the aluminum tantalum oxide glass.

[0022] Preferably, the pressure for pressing into blocks is 10-20 MPa.

[0023] Preferably, the melting-solidification process in step (2) is a containerless melting-solidification process;

[0024] The containerless melting-solidification process includes: suspending a block of glass raw material stably, heating it to a molten state by laser, and then cooling it to obtain the aluminum-tantalum oxide glass;

[0025] Preferably, the suspension method includes at least one of pneumatic suspension and electrostatic suspension; more preferably, the gas used in the pneumatic suspension includes at least one of oxygen, nitrogen, helium, argon and air, preferably oxygen or argon.

[0026] Preferably, the laser used for the laser heating includes a CO2 laser and / or a semiconductor laser; the temperature of the melt in the molten state is 1200-2700°C.

[0027] In a third aspect, the present invention provides a use of aluminum-tantalum oxide glass, characterized in that the aluminum-tantalum oxide glass is used for electronic product covers, touch panels, AR / VR / MR, optical prisms and optical lenses.

[0028] Beneficial effects:

[0029] The present invention tests the transmittance and refractive index of high entropy glass. The aluminum-tantalum oxide glass of the present invention is used as a cover material for electronic products of smart devices, so the maximum transmittance of visible light in the range of 400nm-800nm ​​is focused on, and the maximum transmittance reaches 79.6%.

[0030] The aluminum-tantalum oxide glass described in the present invention is used as a high-refractive lens material, and therefore focuses on the refractive index at 588 nm. The refractive index of the high-entropy glass prepared in the present invention exceeds 2.0, with a maximum of 2.03, making it an ultra-high refractive index glass.

[0031] The high hardness, high Young's modulus, ultra-high refractive index oxide high entropy glass of the present invention is used as electronic equipment modification material and high refractive index window material, so the mechanical properties of the glass are of great concern. The density of the glass is ≥6.4g / cm 3 The maximum can reach 6.79g / cm 3 , Young's modulus ≥180GPa, up to 186GPa, Vickers hardness ≥9.0GPa, up to 9.18GPa, which can effectively improve the drop resistance and wear resistance and reduce the volume of the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The wavelength-transmittance test results of the samples of Example 1, Example 3, and Example 4 are shown in the figure. It can be seen from the figure that the transmittance of Example 1 and Example 4 exceeds 76% in the visible light range, among which Example 1 reaches 79.6%. Example 3 contains the luminescent element Tm 3+ ions cause multiple absorption peaks in the range of 200-2500 nm;

[0033] Figure 2 The transmittance of Example 1, Example 3, and Example 4 in the range of 2500-10000nm is shown in the figure. As can be seen from the figure, the transmittance of the embodiments is above 70%, with Example 1 reaching a maximum of 76%, and the infrared cutoff wavelength is 6674nm;

[0034] Figure 3 The refractive index and Abbe number variation of samples in Examples 1-4 at a wavelength of 588 nm are shown in the figure. It can be seen from the figure that the refractive index of the examples is above 2, and the transmittance of Example 2 reaches 2.03;

[0035] Figure 4 Wavelength-transmittance test results of samples from experiments 1-4;

[0036] Figure 5 This is a graph of the test depth-Young's modulus of the samples of Experiment 1. It can be seen from the figure that the Young's modulus of Examples 1-4 all exceeds 180 GPa, among which Example 4 reaches the highest of 186 GPa;

[0037] Figure 6 Depth-nanoindentation hardness diagram of the sample tested in Experiment 1. DETAILED DESCRIPTION

[0038] The present invention is further described below through the following embodiments. It should be understood that the following embodiments are only used to illustrate the present invention, rather than to limit the present invention.

[0039] In the present invention, the main components of the aluminum-tantalum oxide glass are Al2O3, Ta2O5, ZrO2, and two other oxides. The other two oxides are any two of Gd2O3, La2O3, Sc2O3, Tm2O3, Lu2O3, Yb2O3, etc. The aluminum-tantalum oxide glass described in the present invention has excellent mechanical properties, including a Vickers hardness exceeding 9 GPa, with a maximum of 9.18 GPa; a Young's modulus exceeding 180 GPa, with a maximum of 186 GPa; and a glass density exceeding 6.4 g / cm 3 , the maximum can reach 6.87g / cm 3 . It can significantly improve the wear resistance and drop resistance of glass and can reduce the volume to make thinner cover glass materials. The aluminum tantalum oxide glass described in the present invention also has excellent optical properties, among which the transmittance in the visible light range exceeds 76%, and can reach a maximum of 79.6%; the refractive index at a wavelength of 588nm exceeds 2.0, and can reach a maximum of 2.03. This glass is widely used in electronic product covers, AR / VR / MR equipment, optical prisms, and optical lenses.

[0040] The following is an exemplary description of a method for preparing aluminum-tantalum oxide glass.

[0041] Powders of Ta2O5, ZrO2, Gd2O3, Al2O3 and the fifth oxide (La2O3, Sc2O3, Tm2O3, Lu2O3) in a prescribed amount are added to anhydrous ethanol, wet-grinded and mixed uniformly to obtain a raw material mixture.

[0042] The raw material mixture is pressed under a pressure of 20 MPa into a block (cylinder, for example, 4 mm in diameter*4 mm in height).

[0043] The block is subjected to a melting-solidification process to obtain an oxide high entropy glass with high hardness, high Young's modulus and high refractive index.

[0044] The melting-solidification technology used in the present invention is a pneumatic suspension furnace. The container-free suspension technology can avoid the contact between the melt and the container wall, suppress heterogeneous shapes, and solve the problem of easy crystallization in methods other than the gas suspension technology, so that amorphous aluminum-tantalum oxide glass can be prepared.

[0045] As a preferred technical solution of the present invention, the containerless melting-solidification process includes: stably suspending the glass raw material block obtained by pretreatment in the air, laser heating it to a molten state, and cooling it to obtain aluminum tantalum oxide glass. Preferably, the gas used for the pneumatic suspension includes any one or a combination of at least two of oxygen, nitrogen, helium, argon or air, preferably oxygen or argon. Preferably, the melt temperature of the molten state is 1200-2700°C, for example, 1200°C, 1600°C, 1800°C, 2200°C, 2300°C, 2700°C, etc., but is not limited to the listed values, and other values ​​not listed within this numerical range are also applicable.

[0046] Performance testing:

[0047] According to the test requirements, the glass sample was double-sided polished into a glass sheet with a thickness of 1 mm;

[0048] The mechanical properties of high entropy glass were tested using a G200 in-situ nanomechanical measuring instrument to measure nanoindentation hardness and Young's modulus, with a test depth of >1500nm and an indenter load of >500mN.

[0049] The Vickers hardness of the high-entropy glass was tested using a Tukon2100B Vickers hardness tester with a load of HV0.3 (2.94N). The refractive index of the high-entropy glass was measured using a JAW M-2000 ellipsometer in the wavelength range of 200nm-1700nm, and the refractive index at nd was the refractive index at 588nm. The transmittance in the range of 200nm-2500nm was measured using a U4100 UV spectrometer, and the transmittance in the range of 2500nm-10000nm was measured using an integrating sphere.

[0050] The following examples are further given to illustrate the present invention in detail. It should also be understood that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Some non-essential improvements and adjustments made by those skilled in the art based on the above content of the present invention all fall within the scope of protection of the present invention. The specific process parameters and the like in the following examples are only examples within a suitable range, that is, those skilled in the art can make selections within a suitable range through the description herein, and are not limited to the specific numerical values ​​exemplified below.

[0051] Example 1:

[0052] (1) adding powders of 10% La2O3, 10% Gd2O3, 32% Al2O3, 36% Ta2O5, and 12% ZrO2 in accordance with the formula to anhydrous ethanol and mixing them by wet grinding to obtain a raw material mixture;

[0053] (2) pressing the raw material mixture described in step (1) into a block under a pressure of 20 MPa;

[0054] (3) Melting and solidifying the cylinder in step (2) to obtain a high-hardness, high-Young's modulus, high-refractive-index oxide high-entropy glass; specifically, the pre-treated glass raw material block is stably suspended in the air, laser-heated to a molten state, and cooled to obtain an aluminum-tantalum oxide glass. The gas used for pneumatic suspension is oxygen; the melt temperature of the molten state is 2300°C;

[0055] (4) After the melting-solidification treatment in step (3), an annealing treatment is further performed at 500° C. for 2 hours, thereby preparing an amorphous aluminum-tantalum oxide glass.

[0056] Example 2:

[0057] The molar ratio of La2O3 in Example 1 was replaced by Sc2O3, and other conditions remained unchanged, and Example 2 was prepared strictly according to the molar percentage of 10% Sc2O3, 10% Gd2O3, 32% Al2O3, 36% Ta2O5, and 12% ZrO2.

[0058] Example 3:

[0059] The molar ratio of La2O3 in Example 1 was replaced by Tm2O3. Other conditions remained unchanged. Example 3 was prepared strictly according to the molar percentage of 10% Tm2O3, 10% Gd2O3, 32% Al2O3, 36% Ta2O5, and 12% ZrO2.

[0060] Example 4:

[0061] The molar ratio of La2O3 in Example 1 was replaced by Lu2O3, and other conditions remained unchanged, and Example 4 was prepared strictly according to the molar percentage of 10% Lu2O3, 10% Gd2O3, 32% Al2O3, 36% Ta2O5, and 12% ZrO2.

[0062] Example 5

[0063] The preparation process of the aluminum-tantalum oxide glass in this embodiment 5 refers to that in embodiment 1, with the only difference being: 12% La2O3, 12% Gd2O3, 30% Al2O3, 34% Ta2O5, and 12% ZrO2.

[0064] Example 6

[0065] The preparation process of the aluminum-tantalum oxide glass in this Example 6 refers to that in Example 1, with the only difference being: 5% La2O3, 5% Gd2O3, 37% Al2O3, 41% Ta2O5, and 12% ZrO2.

[0066] Example 7

[0067] The preparation process of the aluminum-tantalum oxide glass in this Example 7 refers to that in Example 1, with the only difference being: 19% La2O3, 14% Gd2O3, 25% Al2O3, 30% Ta2O5, and 12% ZrO2.

[0068] Comparative Example 1

[0069] The preparation process of the aluminum-tantalum oxide glass in this comparative example 1 refers to that in Example 1, with the only difference being: 16% La2O3, 16% Gd2O3, 30% Al2O3, 34% Ta2O5, and 12% ZrO2.

[0070] Comparative Example 2

[0071] The preparation process of the aluminum-tantalum oxide glass in this comparative example 2 refers to that in Example 1, with the only difference being: 20% La2O3, 20% Gd2O3, 20% Al2O3, 20% Ta2O5, and 20% ZrO2.

[0072] Comparative Example 3

[0073] The preparation process of the aluminum-tantalum oxide glass in this comparative example 3 refers to that in Example 1, with the only difference being: 20% TiO2, 20% Gd2O3, 20% Al2O3, 20% Ta2O5, and 20% ZrO2.

[0074] Table 1 shows the raw material composition of the aluminum-tantalum oxide glass in the present invention:

[0075]

[0076]

[0077] Table 2 shows the performance parameters of the aluminum-tantalum oxide glass of the present invention:

[0078]

[0079] “ / ” in the table means not tested.

[0080] Comparing Example 2 with Example 1, the other fifth oxide is Sc2O3. Since this component has poor glass-forming ability, it is impossible to prepare a sample that meets the test standard size through containerless solidification technology, so there is no need to conduct a transmittance test.

[0081] Comparing Example 3 with Example 1, since Example 3 uses the luminescent rare earth oxide Tm2O3, there are multiple absorption peaks in the transmittance in the UV-vis-NIR band.

[0082] The applicant declares that the present invention is intended to illustrate the detailed structural features of the present invention through the above-described embodiments, but the present invention is not limited to the above-described detailed structural features. This does not mean that the present invention must rely on the above-described detailed structural features in order to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent replacements for selected components, additions of auxiliary components, and selection of specific embodiments, etc., fall within the scope of protection and disclosure of the present invention.

[0083] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0084] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0085] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. An aluminum-tantalum oxide glass, characterized in that: The aluminum-tantalum oxide glass comprises: Al2O3 25-32 mol%, Ta2O5 30-36 mol%, ZrO25-12 mol%, first metal oxide 5-15 mol%, second metal oxide 5-15 mol%, and the total molar sum of the components is 100 mol%. The first metal oxide and the second metal oxide are selected from two of Gd2O3, La2O3, Lu2O3, Yb2O3, HfO2, Nb2O5 and Ga2O3; the molar ratio of the first metal oxide to the second metal oxide is 1:3 to 3:1; The Young's modulus of the aluminum-tantalum oxide glass is ≥180 GPa; the Vickers hardness of the aluminum-tantalum oxide glass is ≥9 GPa; the configuration entropy of the aluminum-tantalum oxide glass is in the range of 1.44R to 1.50R; the maximum transmittance of the aluminum-tantalum oxide glass in the visible light range of 400nm to 800nm ​​is greater than 76%; and the refractive index of the aluminum-tantalum oxide glass is greater than 2.

0.

2. The aluminum-tantalum oxide glass according to claim 1, wherein The aluminum-tantalum oxide glass comprises: 30-32 mol% of Al2O3, 34-36 mol% of Ta2O5, 10-12 mol% of ZrO2, 5-12 mol% of a first metal oxide, and 5-12 mol% of a second metal oxide, the total molar sum of the components being 100 mol%. The aluminum-tantalum oxide glass is in an amorphous phase.

3. The aluminum-tantalum oxide glass according to claim 1, wherein: The aluminum-tantalum oxide glass comprises: Al2O3 25-30 mol%, Ta2O5 30-36 mol%, ZrO2 5-12 mol%, a first metal oxide 10-12 mol%, a second metal oxide 10-12 mol%, and the total molar sum of all components is 100 mol%.

4. A method for preparing the aluminum-tantalum oxide glass according to any one of claims 1 to 3, characterized in that: include; (1) weighing ZrO2 powder, Al2O3 powder, Ta2O5 powder, a first metal oxide powder, and a second metal oxide powder according to the composition of the aluminum-tantalum oxide glass and mixing them to obtain a mixed powder; (2) The obtained mixed powder is pressed into a glass raw material block, and then subjected to a melting-solidification process to obtain the aluminum tantalum oxide glass.

5. The preparation method according to claim 4, characterized in that The pressure for pressing into blocks is 10-20 MPa.

6. The preparation method according to claim 4, characterized in that The melting-solidification process in step (2) is a containerless melting-solidification process; The containerless melting-solidification process includes: stably suspending a glass raw material block, heating it to a molten state by laser, and then cooling it to obtain the aluminum-tantalum oxide glass.

7. The preparation method according to claim 6, characterized in that The suspension method includes at least one of pneumatic suspension and electrostatic suspension.

8. The preparation method according to claim 7, characterized in that The gas used in the pneumatic suspension includes at least one of oxygen, nitrogen, helium, argon and air.

9. The preparation method according to claim 7, characterized in that The gas used in the pneumatic suspension is oxygen or argon; The laser used for the laser heating includes a CO2 laser and / or a semiconductor laser; The melt temperature of the molten state is 1200-2700°C.

10. Use of the aluminum-tantalum oxide glass according to any one of claims 1 to 3 or the aluminum-tantalum oxide glass prepared by the preparation method according to any one of claims 4 to 9, characterized in that: The aluminum-tantalum oxide glass is used for electronic product covers, touch panels, AR glasses, optical prisms and optical lenses.

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