High-alumina glass with high near-infrared section transmittance as well as preparation method and application of high-alumina glass

Abstract

The invention relates to the field of glass manufacturing, and particularly discloses high-alumina glass with high near-infrared section transmittance as well as a preparation method and application of the high-alumina glass. The transmittance of the high-alumina glass with the thickness of 5 mm to near-infrared light with the wavelength of 800-1000 nm is larger than or equal to 90%, and the 5-degree reflectivity is larger than or equal to 7.5%. When the load is 1kg, the scratch width is less than or equal to 80 microns, and no edge breakage phenomenon exists; the limit scratch load is 2.5 kg; the surface stress is not less than 800Mpa, and the Vickers hardness is not less than 650MPa. The high-alumina glass has excellent light transmittance in a near-infrared section (800-1000 nm), and has excellent laser radar optical signal transmission efficiency. Meanwhile, the material also has excellent mechanical strength, wear resistance and chemical resistance, and long-term stability and reliability of the material in a complex environment are ensured.

Description

Technical Field

[0001] The present application relates to the field of glass manufacturing, and more specifically, to a high-aluminum glass with high transmittance in the near-infrared band, its preparation method and application. Background Art

[0002] With the continuous progress of modern technology, Light Detection and Ranging (LiDAR) has become an indispensable sensing technology in many fields. From autonomous vehicles to drone mapping, from industrial inspection to environmental monitoring, LiDAR provides reliable data support for various application scenarios with its high-precision and long-distance measurement capabilities. However, to achieve the efficient operation of LiDAR, the selection of key components is crucial, especially the infrared-transmitting glass plays a vital role. Infrared-transmitting glass is an optical material with high transmittance, low absorption rate and excellent environmental resistance, and is widely used in the window and lens parts of LiDAR. These glass materials can not only effectively protect the internal optical components from external environmental interference, but also ensure the efficient transmission of laser signals in a specific infrared band.

[0003] Currently, most of the existing infrared-transmitting glasses are chalcogenide glasses and fluoride glasses. Chalcogenide glasses have excellent transmittance in the long-wave infrared band but low transmittance in the near-infrared band. Chalcogenide glasses contain toxic elements (such as As, Se), and the processing technology is complex. Fluoride glasses perform well in the near-infrared band, but have poor anti-deliquescence performance and need to be coated with a waterproof film, increasing the process complexity. In addition, some of the existing oxide glasses, although they have good transmittance in the near-infrared region, have low mechanical strength and poor acid and alkali resistance, making it difficult to meet the usage requirements of specific scenarios and greatly limiting their applications. Summary of the Invention

[0004] To solve the above technical problems, the present application provides a high-aluminum glass with high transmittance in the near-infrared band, its preparation method and application. This glass not only has high light transmittance in the near-infrared band (800 - 1000 nm), but also has excellent strength, wear resistance and scratch resistance, and is suitable for the protective glass used in LiDAR displays.

[0005] The present application adopts the following technical solutions:

[0006] In the first aspect, the present application provides a high-aluminum glass with high transmittance in the near-infrared band. The transmittance of the high-aluminum glass with a thickness of 5 mm to near-infrared light with a wavelength of 800 - 1000 nm is ≥90%, and the reflectance at 5° is ≥7.5%; the scratch width with a load of 1 kg is ≤80 μm and there is no edge chipping phenomenon; the ultimate scratch load is 2.5 kg; the surface stress is ≥800 Mpa, and the Vickers hardness is ≥650 MPa;

[0007] The high-aluminum glass is composed of the following components in wt%:

[0008] SiO2 58 - 68%, Al2O3 13 - 25%, Na2O 9 - 20%, K2O 0.5 - 5%, MgO 1 - 8%, ZrO2 0.5 - 4%, fining agent 0.1 - 2%;

[0009] wherein, SiO2 / Al2O3 ≤ 5;

[0010] The total iron content after batch calculation ≤ 100 ppm.

[0011] Furthermore, the composition of the above high - alumina glass in wt% further includes: P2O5 1 - 5%, B2O3 0.5 - 2%, TiO2 0.3 - 2%, CeO2 0.5 - 2%.

[0012] Furthermore, the batch of the above high - alumina glass satisfies: 3.8 ≤ (Al2O3 + SiO2) / (Na2O + K2O) ≤ 4.8.

[0013] Furthermore, the above fining agent is SO4 2- 、NO3 - 、F - 、Cl - or one or more of them.

[0014] Furthermore, the water - resistance level of the above high - alumina glass is HGB2, the acid - resistance level is S2, and the alkali - resistance level is A1.

[0015] In a second aspect, the present application provides a method for preparing the above high - alumina glass with high transmittance in the near - infrared band, which includes:

[0016] Taking Si - containing compounds, Al - containing compounds, Na - containing compounds, Mg - containing compounds, K - containing compounds, Zr - containing compounds and fining agent according to wt%, mixing them and then performing heat treatment to obtain molten glass liquid;

[0017] Making the molten glass liquid into base glass through clarification and homogenization, forming and annealing;

[0018] After cutting and CNC hot - bending processes on the base glass, a glass substrate suitable for lidar is obtained;

[0019] Chemically strengthening the glass substrate in 100% KNO3 to obtain a high - alumina glass with high transmittance in the near - infrared band.

[0020] Furthermore, the temperature of the above chemical strengthening is 380 - 450 °C, and the strengthening time is 250 - 400 min.

[0021] Furthermore, during the process of preparing the molten glass liquid, the temperature of the heat treatment is 1550 - 1660 °C.

[0022] Furthermore, the thickness of the above-mentioned glass substrate is 0.33 - 8 mm.

[0023] In a third aspect, the present application provides an application of the above-mentioned high-aluminum glass with high transmittance in the near-infrared band in a lidar display device.

[0024] In summary, the present application has the following beneficial effects:

[0025] 1. By controlling the mass percentages of SiO2, Al2O3, Na2O, K2O, MgO, ZrO2 and the clarifying agent, and ensuring that the ratio of SiO2 / Al2O3 does not exceed 5, the present application realizes the optimization of the glass network structure, thereby comprehensively improving the optical properties and mechanical strength of the glass, enabling the transmittance of the high-aluminum glass with a thickness of 5 mm in the near-infrared band (800 - 1000 nm) to be ≥ 90%, and significantly improving the transmission efficiency of lidar optical signals.

[0026] 2. After chemical strengthening treatment, the surface stress of the glass is ≥ 800 Mpa, the Vickers hardness is ≥ 650 MPa, and the ultimate scratch-resistant load can reach 2.5 kg, greatly improving the mechanical strength and wear resistance of the glass.

[0027] 3. The glass has excellent chemical resistance, with a water resistance level of HGB2, an acid resistance level of S2, and an alkali resistance level of A1, ensuring its long-term stability and reliability in complex environments.

[0028] 4. In the preferred embodiment, by adding components such as P2O5, B2O3, TiO2 and CeO2 to the high-aluminum glass, the transmittance in the near-infrared band is further improved, ensuring the efficient transmission of the glass in a specific wavelength band, and meeting the requirements of lidar for high transmittance, low absorption rate and excellent environmental resistance. Description of the Drawings

[0029] Figure 1 It is a transmittance curve diagram of the high-aluminum glass (thickness 5 mm) in Example 1 of the present invention within the wavelength range of 800 - 1000 nm.

[0030] Figure 2 It is a reflectance curve diagram of the high-aluminum glass (thickness 5 mm) in Example 1 of the present invention within the wavelength range of 800 - 1000 nm. Detailed Embodiments

[0031] The embodiments of the present invention will be described in detail below in conjunction with examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be regarded as limiting the scope of the present invention. For specific conditions not specified in the examples, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For reagents or instruments not specified by the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0032] The technical solution of the present invention is as follows:

[0033] This application provides a high-aluminum glass with high transmittance in the near-infrared band. The batch formula of the high-aluminum glass, calculated in wt%, includes:

[0034] SiO2 58 - 68%, Al2O3 13 - 25%, Na2O 9 - 20%, K2O 0.5 - 5%, MgO 1 - 8%, ZrO2 0.5 - 4%, fining agent 0.1 - 2%;

[0035] Among them, SiO2 / Al2O3 ≤ 5.

[0036] To facilitate a better understanding of the design of the batch formula of the present invention, the relevant components are further described below:

[0037] SiO2 is the main component that forms silicon-oxygen tetrahedrons and connects to form the glass network structure, which is the basic framework of the glass. The addition amount of SiO2 is 58 - 68%, preferably 60 - 65%. When SiO2 < 58%, the chemical stability of the glass is poor, the weather resistance decreases, and the increase in the liquidus temperature will make the glass unstable. In addition, it will cause an increase in the expansion coefficient, a decrease in mechanical strength and strain point. When SiO2 > 68%, the high-temperature viscosity of the glass increases, resulting in refractory properties, exacerbating the erosion of the kiln refractory materials. Therefore, it is necessary to control its content within a suitable range.

[0038] Al2O3 is prone to forming tetrahedral coordination. The [AlO4] tetrahedral coordination can help build a more compact network together with the [SiO4] tetrahedrons. It is an important component of the glass network structure, and it can also make the geometric shape of the glass change very little. The [AlO4] tetrahedron can also significantly enhance the ion exchange process during chemical strengthening. The addition amount of Al2O3 is 13 - 25%, preferably 15 - 23%. When its content is higher than 13%, the formed aluminum-oxygen tetrahedrons and silicon-oxygen tetrahedrons interpenetrate into a network structure, and a high-aluminum glass with relatively high transmittance can be obtained. However, when the content of Al2O3 exceeds 25%, it is easy to cause poor chemical stability of the glass, and it will also increase the high-temperature viscosity and the difficulty of melting, which is not conducive to production.

[0039] Na2O is a good flux in the glass composition and an important element for ion exchange in chemical strengthening. Further, the scratch resistance of the glass is enhanced through ion exchange in chemical strengthening. The addition amount of Na2O is 9-20%, preferably 12-18%. When the content of Na2O is higher than 20%, the chemical stability of the glass will be greatly reduced. When the content is higher than 9%, it can keep the melting temperature of the glass at a suitable level and provide considerable ion exchange characteristics for the glass. The function of K2O is the same as that of Na2O, and its content range in the sodium aluminosilicate glass of the present invention is 0.5-5%, preferably 0.5-3%.

[0040] MgO can improve the glass meltability, strain point and Young's modulus, and can also balance the glass network structure and inhibit the generation of cracks in the glass. However, when the content of MgO is too high, it will also increase the surface tension of the glass, making it difficult for alkali metal ions to exchange with the glass and reducing the ion exchange rate. Therefore, the content should not exceed 8%. The content range of MgO in the sodium aluminosilicate glass of the present invention is 1-8%, preferably 2-6%.

[0041] ZrO2 not only has the best water resistance, acid resistance, but also the best alkali resistance. An appropriate amount of ZrO2 helps to improve the chemical durability and hardness of the glass. However, if the content of ZrO2 is too high, on the one hand, the devitrification resistance of the glass is reduced, on the other hand, the meltability becomes poor and there is a tendency of devitrification, making the forming difficult. The content range of ZrO2 in the glass of the present invention is 0.5-4%, preferably 0.5-3%.

[0042] It should be particularly noted that in order to improve the light transmittance of the high-aluminum glass in the near-infrared band and reduce the light scattering and absorption of the glass, it is necessary to select a high-purity raw material mine, and the total iron content after batch calculation ≤ 100 ppm.

[0043] In order to improve the light transmittance of the glass in the near-infrared band, improve the mechanical strength and chemical durability, further optimize the above-mentioned batch formula. The composition of the above high-aluminum glass in wt% further includes: P2O5 1-5%, B2O3 0.5-2%, TiO2 0.3-2%, CeO2 0.5-2%.

[0044] Among them, P2O5, as a network former, may change the structure of the glass, increase the chemical resistance and thermal stability. In addition, P2O5 and Al2O3 are easy to form the [AlPO4] structure, which can effectively improve the light transmittance of the glass in the near-infrared band. However, P2O5 is also a glass nucleating agent. Excessive amount will cause the glass to crystallize and reduce the transmittance. Therefore, the content range of P2O5 in the glass of the present invention is 1-5%.

[0045] As a network former, B2O3 can partially replace SiO2 to form a more uniform glass network, reduce light scattering caused by structural inhomogeneity, and improve transmittance. Moreover, it can reduce the thermal expansion coefficient (such as borosilicate glass), lower the melting point, save energy consumption, and at the same time improve the mechanical strength and chemical durability of the glass. However, excessive B2O3 will cause serious delamination of the glass and difficult clarification. Therefore, the content range of B2O3 in the glass of the present invention is 0.5-2%.

[0046] TiO2 can cooperate with iron ions to adjust the hue, reduce the greening phenomenon, and thus effectively improve the transmittance and dispersion performance of optical glass. However, as a coloring agent itself, excessive addition will increase the absorption in the visible light region, thereby leading to a decrease in the overall transmittance of the glass. Therefore, the content range of TiO2 in the glass of the present invention is 0.3-2%. CeO2 has the same effect as TiO2, and the content range of CeO2 in the glass of the present invention is 0.5-2%.

[0047] In the design of the batch formula, it is necessary to control SiO2 / Al2O3 ≤ 5 to improve the homogeneity of the glass, reduce unnecessary scattering, and lower the transmittance.

[0048] Furthermore, the batch formula of high-aluminum glass needs to satisfy: 3.8 ≤ (Al2O3 + SiO2) / (Na2O + K2O) ≤ 4.8. This ratio control can effectively optimize the glass network structure, enhance the ion exchange performance, thereby improving the chemical strengthening effect of the glass, and at the same time it is easy to achieve the melting of the glass.

[0049] Furthermore, the clarifying agent is selected from one or more of SO4 2- , NO3 - , F - , Cl - which can improve the homogeneity of the glass, reduce unnecessary scattering, and thus further improve the transmittance in the near-infrared band. At the same time, these clarifying agents help to improve the bubble discharge during the glass melting process, ensuring the stability of the glass internal structure and the excellent performance of the optical properties.

[0050] The following test methods are used to test the performance of the high-aluminum glass provided by the examples and comparative examples of the present application:

[0051] (1) The transmittance and reflectance of high-aluminum glass with high transmittance in the near-infrared band are tested by a Shimadzu SolidSpce-3700i ultraviolet-visible-near-infrared spectrophotometer with reference to the standard GB / T5433-1985.

[0052] (2) The surface compressive stress value of the high-aluminum glass with high transmittance in the near-infrared band was measured by using the surface stress meter FSM-6000 with reference to the standards of GB / T 18144-2008 and ASTM 1422C-99;

[0053] (3) The Vickers hardness of the high-aluminum glass with high transmittance in the near-infrared band was measured by the automatic micro-Vickers hardness tester HVS-1000AT2.1 with reference to GB / T 37900-2019;

[0054] (4) The scratch resistance of the high-aluminum glass with high transmittance in the near-infrared band was measured by using a scratch resistance tester with reference to the standard ISO12137-2:1997. The scratch width at a load of 1 kg was obtained by observing and measuring with a polarized light microscope. The ultimate scratch resistance load refers to the load value when the glass is scratched by loading the load until the glass is broken.

[0055] (5) The chemical stability of the high-aluminum glass with high transmittance in the near-infrared band was determined according to the standards of DIN 12116, ISO 695 and ISO 719.

[0056] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present invention and are not used to limit the present invention.

[0057] The first group of embodiments

[0058] This group of embodiments provides a high-aluminum glass with high transmittance in the near-infrared band, and its preparation method includes:

[0059] (1) According to the formula shown in Table 1, take silicon-containing compounds, aluminum-containing compounds, sodium-containing compounds, magnesium-containing compounds, potassium-containing compounds, zirconium-containing compounds and clarifying agents, mix them and enter the heating and melting treatment at 1550-1660 °C to obtain molten glass liquid;

[0060] (2) The molten glass liquid is made into a base glass by clarification, homogenization, forming and annealing;

[0061] (3) After cutting and CNC hot bending the base glass, a glass substrate suitable for lidar is obtained, with a thickness of 5 mm.

[0062] (4) Chemically strengthen the glass substrate in 100% KNO3 at a temperature of 430 °C for 290 min to obtain a high-aluminum glass with high transmittance in the near-infrared band.

[0063] Table 1.

[0064]

[0065] The properties of the high-aluminum glass provided in the above examples and comparative examples were measured, and the results are shown in Table 2:

[0066] Table 2.

[0067]

[0068]

[0069] As can be seen from Table 1 and Table 2:

[0070] (1) By comparing Example 1 with Comparative Example 1, it can be found that on the premise of the same batch composition of the glass batch, when the iron content in the batch is relatively large, the content of Fe 2+ is bound to increase, and it has an absorption peak at 700 - 1000 nm (derived from its d-d electron transition), which will cause the glass to turn blue-green, resulting in light loss and further affecting the transmittance of the glass in the near-infrared band. This shows that high-purity raw materials must be selected, and the total iron content after batch calculation should be ≤ 100 ppm to improve the transmittance of the high-aluminum glass in the near-infrared band and reduce the light scattering and absorption of the glass.

[0071] (2) By comparing Example 1 with Comparative Example 2, it can be found that when the SiO2 / Al2O3 of the glass batch is greater than 5, the glass melting is difficult, the homogeneity is poor, and there are more microbubbles inside, increasing the scattering and resulting in a lower transmittance of the glass.

[0072] Second group of examples

[0073] This group of examples provides a high-aluminum glass with high transmittance in the near-infrared band. Its preparation method is basically the same as that of Example 1, except for the batch ratio and the strengthening process.

[0074] The batch of this group of examples is shown in Table 3, the strengthening temperature is 420 °C, and the strengthening time is 300 min.

[0075] Table 3.

[0076]

[0077]

[0078] The properties of the high-aluminum glass provided in the above examples and comparative examples were measured, and the results are shown in Table 4:

[0079] Table 4.

[0080]

[0081] As can be seen from Table 3 and Table 4:

[0082] (1) Compared with Example 1, in Examples 4 - 8, a certain amount of TiO2 and / or CeO2 is added to the batch formula, which can improve the light transmittance of the glass in the near-infrared band to a certain extent. Although the transmittance is only increased by 0.3% - 0.5%, it can be effectively improved for lidar ranging. In addition, the addition of these two substances also improves the water resistance and acid and alkali resistance of the material to a certain extent. This is because Ti in TiO2 4+ acts as a network intermediate in silicate glass and partially replaces Si in the Si-O tetrahedron 4+ , improving the glass network connectivity, reducing the electron transition absorption caused by structural defects (such as non-bridging oxygen bonds), and decreasing the absorption coefficient in the mid-infrared band. In addition, Ti 4+ can participate in network formation in silicate glass and replace part of the Si-O-Si bonds through Ti-O-Si bonds. Since the bond energy of Ti-O-Si bonds (~435 kJ / mol) is slightly lower than that of Si-O-Si bonds (~460 kJ / mol), but the higher coordination ability of Ti 4+ (usually existing in the form of [TiO6] octahedra) can increase the three-dimensional crosslinking degree of the glass network, significantly reduce the proportion of non-bridging oxygen, and thus enhance the resistance to H + erosion. As a strong oxidant (Ce 4+ →Ce 3+ ), CeO2 can oxidize Fe 2+ to Fe 3 + (the absorbance of Fe 3+ in the NIR is only about 1 / 10 of that of Fe 2+ ), thereby reducing the infrared absorption loss and improving the transmittance in the infrared band. The ionic radius of Ce 4+ (about ) is quite different from that of Si 4+ ( ), but it can partially participate in the glass network to fill the structural gaps, reduce the diffusion channels of H + or OH - , and delay the acid and alkali corrosion rate.

[0083] (2) Compared with Examples 4 - 8, in Comparative Examples 4 - 5, the alkali metal content is too high, that is, (Al2O3 + SiO2) / (Na2O + K2O) ≤ 3.8, and the acid and alkali resistance of the obtained glass is much worse than that of this application. This is because the basic skeleton of the glass is a three-dimensional crosslinked silicon-oxygen (Si-O-Si) network structure. When introducing alkali metal oxides (such as Na2O, K2O), alkali metal ions (Na + , K + ) as "network modifiers" will break the continuous Si-O bonds and form non-bridging oxygen (≡Si-O - ·Na+ ), resulting in an increase in the porosity of the network structure, and Na + occupies the network gaps, weakening the compactness of the structure and increasing the H + or OH - permeation channels.

[0084] The third group of embodiments

[0085] This group of embodiments provides a high-aluminum glass with high transmittance in the near-infrared band. Its preparation method is basically the same as that of Embodiment 1, except for the proportion of the batch formula and the strengthening process.

[0086] The batch formula of this group of embodiments is shown in Table 5, the strengthening temperature is 430 °C, and the strengthening time is 290 min.

[0087] Table 5

[0088]

[0089] The properties of the high-aluminum glass provided in the above embodiments and comparative examples were measured, and the results are shown in Table 6:

[0090] Table 6.

[0091]

[0092]

[0093] As can be seen from Table 5 and Table 6:

[0094] (3) Compared with Embodiment 1, in Embodiments 9-12, adding a certain amount of P2O5 and / or B2O3 to the batch formula can, to a certain extent, improve the transmittance of the glass in the near-infrared band. This is because the hydroxyl groups (–OH) in silicate glass will produce strong absorption peaks in the near-infrared band, reducing the transmittance. When boron exists in a three-coordinated form, it can inhibit the dissolution of water during the high-temperature melting process, reducing the content of –OH impurities; at the same time, the boron-oxygen network with stronger acidity has a lower water molecule adsorption ability than the silicon-oxygen network, which can further reduce the near-infrared absorption. The polarizability of the phosphate tetrahedron [PO4 3- is relatively low, weakening the intrinsic vibration absorption in the infrared band and increasing the transmittance. In addition, the addition of both can improve the mechanical properties and water, acid, and alkali resistance of the material. This is because boron can form both a three-coordinated triangle (flexible network) and can be transformed into a four-coordinated tetrahedron [BO4], cross-linking with the silicon-oxygen network to enhance the structural rigidity and improve the strength. The phosphate tetrahedron [PO4 3- can form a chain-like or network structure, composite with the silicon-aluminum network to enhance the strength. [BO4] and [PO4 3- can combine with the free metal ions in the network (such as Na +) Reduce the ion exchange rate and slow down the spalling of the glass surface.

[0095] (4) Comparative Examples 6-7 did not adopt this technical solution, and crystallization occurred to varying degrees, and the optical properties could not be measured. In addition, compared with Examples 9-12, due to the too high silicon-aluminum ratio, the acid and alkali resistance of the obtained glass was far inferior to that of this application.

[0096] This specific embodiment is only an interpretation of this application, and it is not a limitation of this application. Those skilled in the art can make modifications without creative contributions to this embodiment after reading this specification, but as long as it is within the scope of the claims of this application, it is protected by the patent law.

Claims

1. A high-aluminum glass with high transmittance in the near-infrared band, characterized in that, The high-aluminum glass with a thickness of 5 mm has a transmittance of ≥90% for near-infrared light with a wavelength of 800 - 1000 nm, a reflectance of ≥7.5% at 5°, a scratch width of ≤80 μm with no edge chipping when the load is 1 kg, and a limit scratch load of 2.5 kg. The surface stress is ≥800 Mpa and the Vickers hardness is ≥650 MPa. The batch formula of the high-aluminum glass includes, by weight percentage: SiO2 58 - 68%, Al2O3 13 - 25%, Na2O 9 - 20%, K2O 0.5 - 5%, MgO 1 - 8%, ZrO2 0.5 - 4%, and fining agent 0.1 - 2%. Among them, SiO2 / Al2O3 ≤ 5. The total iron content after batch formula calculation is ≤100 ppm.

2. The high-aluminum glass with high transmittance in the near-infrared band according to claim 1, characterized in that, The composition of the high-aluminum glass also includes, by wt%, P2O5 1 - 5%, B2O3 0.5 - 2%, TiO2 0.3 - 2%, and CeO2 0.5 - 2%.

3. The high-aluminum glass with high transmittance in the near-infrared band according to claim 1, characterized in that, The batch formula of the high-aluminum glass satisfies 3.8 ≤ (Al2O3 + SiO2) / (Na2O + K2O) ≤ 4.

8.

4. The high-aluminum glass with high transmittance in the near-infrared band according to claim 1, characterized in that, The clarifying agent is SO4 2- , NO3 - , F - , Cl - or one or more of them.

5. The high-aluminum glass with high transmittance in the near-infrared band according to claim 1, characterized in that, The water resistance level of the high-aluminum glass is HGB2, the acid resistance level is S2, and the alkali resistance level is A1.

6. A preparation method of high-aluminum glass with high transmittance in the near-infrared band according to any one of claims 1-5, characterized in that, It includes: Taking silicon-containing compounds, aluminum-containing compounds, sodium-containing compounds, magnesium-containing compounds, potassium-containing compounds, zirconium-containing compounds, and fining agent according to weight percentage, mixing them and then performing heat treatment to obtain molten glass liquid; The base glass obtained by clarifying, homogenizing, forming, and annealing the molten glass liquid; After cutting and CNC hot bending the base glass, a glass substrate suitable for lidar is obtained; Chemically strengthening the glass substrate in 100% KNO3 to obtain high-aluminum glass with high transmittance in the near-infrared band.

7. The preparation method of the high-aluminum glass with high transmittance in the near-infrared band according to claim 6, characterized in that, The temperature of the chemical strengthening is 380 - 450 °C and the strengthening time is 250 - 400 min.

8. The preparation method of the high-aluminum glass with high transmittance in the near-infrared band according to claim 6, characterized in that, During the process of preparing the molten glass liquid, the temperature of the heat treatment is 1550 - 1660 °C.

9. The preparation method of the high-aluminum glass with high transmittance in the near-infrared band according to claim 6, characterized in that, The thickness of the glass substrate is 0.33 - 8 mm.

10. Application of the high-aluminum glass with high transmittance in the near-infrared band according to any one of claims 1 - 5 in a lidar display device.

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