Ultra-thin glass and strengthened impact-resistant ultra-thin glass, and methods of making and use thereof

Abstract

The application provides an ultrathin glass and a strengthened impact-resistant ultrathin glass, and a preparation method and application thereof. The ultrathin glass is prepared by controlling the composition and components of the ultrathin glass, and the components satisfy the following relationships (1)-(3) at the same time: (1) 11.00% <= ((Li2O) + (K2O)) / ((Al2O3) + (Na2O)) <= 20%; (2) 6% <= ((ZrO2) + (Li2O) + (MgO)) / ((Na2O) + (K2O) + (SiO2)) <= 14%; and (3) 4.1 <= ((B2O3) + (SiO2) + (ZrO2)) / ((K2O) + (Na2O)) <= 5.1. The ultrathin glass provided by the application has ultrahigh Young's modulus and low thermal expansion coefficient at a thickness of not more than 0.40 mm; and the strengthened impact-resistant ultrathin glass prepared by the application has good impact resistance, drop resistance, good bending strength and low warping performance.

Description

Technical Field

[0001] This application relates to the field of glass materials technology, and in particular to an ultrathin glass and a reinforced impact-resistant ultrathin glass, as well as their preparation methods and applications. Background Technology

[0002] With the rapid rise of foldable devices, the application of ultra-thin glass in these devices is becoming increasingly widespread. However, during use, the insufficient strength of ultra-thin glass makes it prone to breakage upon drops or impacts, affecting the user experience. Through testing and analysis, it has been determined that the surface quality of the glass is one of the main factors affecting its strength, and is closely related to its manufacturing process.

[0003] In recent years, the foldable device industry has seen a surge in products using ultra-thin glass, including one-piece molded products and two-piece molded (chemically thinned) ultra-thin glass products. One-piece molded products refer to ultra-thin sheets produced directly using methods such as the pull-down process, followed by cutting, strengthening, and coating to create ultra-thin glass covers. Two-piece molded products involve thinning relatively thick glass sheets to a specific thickness using chemical techniques, followed by further processing. In comparison, the surface quality of two-piece molded products is difficult to control, while one-piece molded products offer better surface quality, higher strength, and lower cost, giving them a competitive edge in the market.

[0004] Furthermore, with the continuous development of the electronics industry, the market demands increasingly higher performance from ultra-thin glass materials, particularly in ensuring both bending strength and impact and drop resistance. Increasing the Young's modulus of ultra-thin glass can prevent deformation under stress, thus improving impact resistance; simultaneously, reducing its coefficient of thermal expansion can address the technical issue of excessive warping. In addition, chemical strengthening can improve the surface chemical properties (CS) of ultra-thin glass, thereby enhancing its impact and drop resistance. Therefore, ultra-thin glass with high Young's modulus, low coefficient of thermal expansion, and high CS has become the choice of more end-user manufacturers and is a hot research area requiring further development. Summary of the Invention

[0005] The purpose of this application is to provide an ultrathin glass with a high Young's modulus and a low coefficient of thermal expansion, which can improve its impact resistance and reduce the warpage of the prepared reinforced ultrathin glass. Furthermore, through chemical strengthening, the resulting reinforced impact-resistant ultrathin glass further exhibits high surface compressive stress, improving its impact resistance and drop resistance, while also possessing good bending strength.

[0006] In a first aspect, this application provides an ultrathin glass comprising the following components, by molar percentage of oxides:

[0007] SiO2: 63.50-66.00 mol%;

[0008] Al2O3: 10.50-12.50 mol%;

[0009] P2O5: 0.00-1.00 mol%;

[0010] Li₂O: 0.00-3.00 mol%;

[0011] Na₂O: 12.00-14.00 mol%;

[0012] K2O: 1.00-4.00 mol%;

[0013] MgO: 5.00-7.00 mol%;

[0014] Zr₂O: 0.10-1.10 mol%;

[0015] B2O3: 0.20-1.10 mol%;

[0016] Each component simultaneously satisfies the following relationships (1) to (3):

[0017] (1)11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%;

[0018] (2)6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14%

[0019] (3)4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.1.

[0020] Furthermore, in some embodiments of this application, the thickness of the ultrathin glass is 0.02-0.40 mm, preferably 0.03-0.30 mm.

[0021] Furthermore, in some embodiments of this application, the average linear coefficient of thermal expansion of the ultrathin glass is ≤94×10⁻⁶. -7 / ℃, preferably 83×10 -7 / ℃-94×10 -7 / ℃.

[0022] Furthermore, in some embodiments of this application, the Young's modulus of the ultrathin glass is not less than 72.0 GPa; and / or

[0023] The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

[0024] Secondly, this application also provides a method for preparing the ultrathin glass described in the first aspect, comprising the following steps: mixing the raw materials for preparing the glass, melting them, molding them in one step, and then annealing them to obtain the ultrathin glass.

[0025] Furthermore, in some embodiments of this application, the melting temperature is 1300℃-1700℃, and the melting time is 4h-240h.

[0026] Furthermore, in some embodiments of this application, the annealing temperature is 550℃-650℃, and the annealing time is 1min-1440min.

[0027] Furthermore, in some embodiments of this application, the one-time forming includes any one of narrow slit drawing, overflow drawing, secondary thinning, and float glass.

[0028] Thirdly, this application also provides a reinforced impact-resistant ultrathin glass with a thickness of t, which includes a double-sided reinforcing layer and a tensile stress layer. The reinforcing layers extend from the surface of the reinforced impact-resistant ultrathin glass in the inward direction, wherein the double-sided reinforcing layers are symmetrically distributed, and the thickness of each reinforcing layer is not higher than 0.28t.

[0029] The central region of the tensile stress layer comprises the following components, by molar percentage of oxides:

[0030] SiO2: 63.50-66.00 mol%;

[0031] Al2O3: 10.50-12.50 mol%;

[0032] P2O5: 0.00-1.00 mol%;

[0033] Li₂O: 0.00-3.00 mol%;

[0034] Na₂O: 12.00-14.00 mol%;

[0035] K2O: 1.00-4.00 mol%;

[0036] MgO: 5.00-7.00 mol%;

[0037] Zr₂O: 0.10-1.10 mol%;

[0038] B2O3: 0.20-1.10 mol%;

[0039] Each component simultaneously satisfies the following relationships (1) to (3):

[0040] (1)11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%;

[0041] (2)6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14%

[0042] (3)4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.1.

[0043] Furthermore, in some embodiments of this application, the thickness t of the reinforced impact-resistant ultrathin glass is 0.02-0.40 mm, preferably 0.03-0.30 mm.

[0044] Furthermore, in some embodiments of this application, the chemical strengthening process for enhancing impact-resistant ultrathin glass includes single-step chemical strengthening.

[0045] Furthermore, in some embodiments of this application, in the single-step chemical fortification, a salt bath containing KNO3 is used for chemical fortification; preferably, in the single-step chemical fortification, the KNO3 content in the salt bath containing KNO3 is 100 wt%.

[0046] Furthermore, in some embodiments of this application, the temperature for single-step chemical strengthening is 380°C to 500°C, and the time for single-step chemical strengthening is 10 min to 360 min; preferably, the temperature for single-step chemical strengthening is 390°C to 500°C, more preferably 390°C; even more preferably, the time for single-step chemical strengthening is 20 min to 360 min, more preferably 90 min.

[0047] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.10mm-0.40mm, its surface compressive stress CS ≥ 1100MPa, preferably its surface compressive stress CS is 1100MPa~1300MPa.

[0048] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS ≥ 1100 MPa; preferably, its surface compressive stress CS is 1100 MPa to 1200 MPa.

[0049] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03mm-0.40mm, its compressive stress layer depth Dol ≤ 11.00μm, preferably its compressive stress layer depth Dol is 8.00μm to 11.00μm.

[0050] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol is ≤ 11.00 μm, and preferably its compressive stress layer depth Dol is 8.00 μm to 11.00 μm.

[0051] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.03mm and 0.40mm, its average pen drop height is ≥60mm, preferably between 60.00mm and 250.00mm.

[0052] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its average pen drop height is ≥200.00 mm, preferably 200.00 mm to 250.00 mm.

[0053] Furthermore, in some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical bending radius is ≤ 0.40 mm; preferably, its critical bending radius is 0.30 mm to 0.40 mm.

[0054] Fourthly, this application also provides the application of the ultra-thin glass described in the first aspect or the ultra-thin glass prepared by the preparation method of the ultra-thin glass described in the second aspect or the reinforced impact-resistant ultra-thin glass of the third aspect in the field of electronic products.

[0055] Furthermore, in some embodiments of this application, the application in the field of electronic products is an application on the display screen of foldable electronic devices.

[0056] Furthermore, in some embodiments of this application, the application in the field of electronic products is in color filters, filter printed electronics, touch panel sensors, fingerprint sensors, thin-film battery substrates, mobile electronic devices, semiconductor interlayers, flexible / foldable displays, solar cells, or displays.

[0057] Fifthly, this application also provides an electronic device, including the ultra-thin glass described in the first aspect, or the ultra-thin glass prepared by the method described in the second aspect, or the reinforced impact-resistant ultra-thin glass of the third aspect.

[0058] Sixthly, this application also provides a glass article, including the ultra-thin glass described in the first aspect or the ultra-thin glass prepared by the method described in the second aspect or the reinforced impact-resistant ultra-thin glass of the third aspect.

[0059] The beneficial effects of this application are:

[0060] 1. This application provides an ultrathin glass, which, by controlling its composition to conform to a specific component correlation, enables the prepared ultrathin glass to maintain an ultra-high Young's modulus and a low coefficient of thermal expansion with a thickness not exceeding 0.40 mm; thereby giving it good impact resistance and the prepared reinforced impact-resistant ultrathin glass having low warpage performance.

[0061] 2. This application also provides a reinforced impact-resistant ultrathin glass. By controlling the composition of the impact-resistant ultrathin glass to conform to a specific component correlation, the prepared reinforced impact-resistant ultrathin glass has a surface compressive stress CS≥1100MPa and a compressive stress layer depth Dol≤11.00μm when the thickness t is 0.10mm-0.30mm. It also has good drop resistance and bending resistance. Attached Figure Description

[0062] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0063] Figure 1 This is a schematic diagram of the pen impact height testing device in this application; wherein, 1-marker, 2-pen impact height, 3-coated glass sample, 3-1-first surface of the coated glass sample, 3-2-second surface of the coated glass sample, 4-PVC board. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] In this application, surface compressive stress (CS) refers to the compressive stress value of the compressive stress layer formed on the glass surface after chemical strengthening and ion exchange treatment. For ion exchange treatment, ion exchange is performed on the glass surface, forming a surface layer with residual compressive stress, which is the compressive stress layer.

[0066] In this application, the compressive stress layer depth (DOL) is the thickness of the glass surface layer where ion exchange occurs during the chemical strengthening process.

[0067] In this application, the central tensile stress (CT) is the value of the stress formed at the center of the strengthened glass after the glass surface is chemically strengthened to form a compressive stress layer, which is opposite in direction to the surface compressive stress.

[0068] In this application, transmittance refers to the ratio of the radiant energy projected onto and transmitted through an object to the total radiant energy projected onto the object during the process of incident light flux from the incident surface or medium to the other side.

[0069] Test method:

[0070] 1. Stress testing

[0071] In this application, the CS, CT and DOL of the glass under test are tested using an FSM-6000 device. During the test, the refractive index is set to 1.51 and the photoelastic coefficient is set to 28.6.

[0072] 2. Thickness test

[0073] In this application, a digital micrometer (Mitutoyo 406-250-30) or a laser thickness gauge is used to test the thickness of the glass to be tested.

[0074] 3. Optical performance testing

[0075] In this application, the transmittance and optical b-value of the glass under test are tested using a haze meter according to GB / T 7962.12-2010 "Test Methods for Colorless Optical Glass - Part 12: Spectral Internal Transmittance". Specifically, the transmittance and optical b-value of five pieces of glass from the same batch to different wavelengths of light are tested using a haze meter. The average transmittance of the five pieces of glass under 550nm wavelength light is taken as the transmittance result of the glass under 550nm wavelength light. The average optical b-value of the five pieces of glass is taken as the optical b-value result of the glass under test.

[0076] The haze meter used in the test of this invention is a Konica Minolta CM-3600A spectrophotometer from Japan. The light receiving optical system is transmission, the spectral dispersive method is a planar refracting grating, the wavelength range is 360nm~740nm, the wavelength spacing is 10nm, the illumination source is a pulsed xenon lamp X4, the ambient temperature of the instrument is 24℃, and the air humidity is 40%.

[0077] 4. Young's modulus test

[0078] In this application, the UMS-100 ultrasonic material characterization system is used to test the Young's modulus of the glass under test by acoustic wave.

[0079] 5. Density test

[0080] The density of the glass under test was measured using an ALFA MIRAGE SD-200L electronic density balance from Japan, based on the principle of Archimedes' displacement method.

[0081] 6. Refractive index test

[0082] In this application, the test was conducted according to the method of GB / T7962.1-2010.

[0083] 7. Average pen impact height test

[0084] In this application, a marker pen is used to test the impact of a pen drop. The impact height is obtained according to the method in group standard T / CSTM 00409-2021. Before testing the impact height, a 50μm PE film is applied to the first and second surfaces of the glass to be tested using a roller press. The average impact height of five coated glass pieces is taken as the average impact height of the glass to be tested. (See reference...) Figure 1 .

[0085] 8. Critical radius of curvature test for bending

[0086] In this application, the test results were obtained using the national standard GB / T 38686-2020 "Test Method for Flexibility of Ultrathin Glass - Two-Point Bending Method".

[0087] 9. Thermal expansion test

[0088] This application tests the average linear thermal expansion coefficient of the glass under test in the range of 25 to 300℃ according to the test method of GB / T7962.16-2010.

[0089] 10. Warpage Value Test

[0090] This application uses a two-dimensional measuring instrument to test the warpage value of the glass under test.

[0091] Foldable devices, especially foldable screens, require that the cover glass and substrate of the display screen be flexible, allowing them to be bent and rolled up without obvious creases when unfolded. They also require a long service life and extremely high light transmittance. However, existing ultra-thin glass used in foldable screens cannot simultaneously achieve good bending strength while ensuring impact and drop resistance, as well as low warpage performance.

[0092] Based on this, this application proposes an ultrathin glass that, by controlling its composition to conform to specific component correlations, can achieve high Young's modulus, low coefficient of expansion, and high impact resistance. The strengthened ultrathin glass prepared by this method has high surface compressive stress, and also has high impact resistance, drop resistance, bending strength, and low warping performance.

[0093] In a first aspect, this application provides an ultrathin glass comprising the following components:

[0094] SiO2: 63.50-66.00 mol%;

[0095] Al2O3: 10.50-12.50 mol%;

[0096] P2O5: 0.00-1.00 mol%;

[0097] Li₂O: 0.00-3.00 mol%;

[0098] Na₂O: 12.00-14.00 mol%;

[0099] K2O: 1.00-4.00 mol%;

[0100] MgO: 5.00-7.00 mol%;

[0101] Zr₂O: 0.10-1.10 mol%;

[0102] B2O3: 0.20-1.10 mol%;

[0103] Each component simultaneously satisfies the following relationships (1) to (3):

[0104] (1)11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%;

[0105] (2)6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14%

[0106] (3)4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.1.

[0107] In the ultrathin glass of this application, SiO2 is an oxide that forms the glass network framework and is used to stabilize the glass network structure. In some embodiments of this application, the SiO2 content, based on the molar percentage of oxides, is 63.50 mol% to 66.00 mol%, preferably 64.00 mol% to 66.00 mol%. In some embodiments of this application, the SiO2 content, based on the molar percentage of oxides, can be: 63.50 mol%, 63.60 mol%, 63.70 mol%, 63.80 mol%, 63.90 mol%, 64.00 mol%, 64.10 mol%, 64.20 mol%, 64.30 mol%, 64.40 mol%, 64.50 mol%, 64.60 mol%, 64.70 mol%, 64.80 mol%, 64.90 mol%, 65.00 mol%, 65.10 mol%, 65.20 mol%, 65.30 mol%, 65.40 mol%, 65.50 mol%, 65.60 mol%, 65.70 mol%, 65.80 mol%, 65.90 mol%, or 66.00 mol%, etc., as well as all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0108] In the glass system of this application, Al2O3 is used to construct the glass framework, serving as a supplement to the network; the ion exchange rate can also be adjusted by changing the spatial dimensions for ion exchange within the glass network. Since the application of ultrathin glass in this application also requires extremely high bending strength, the amount of Al2O3 used needs to be limited to a specific range. Excessive Al2O3 content will result in very high melting and operating temperatures, which can easily lead to crystallization and poor transparency and flexibility, while excessively low Al2O3 content will result in poor chemical stability of the glass. In some embodiments of this application, the Al2O3 content, based on the molar percentage of oxides, is 10.50 mol%-12.50 mol%, preferably 11.00 mol%-12.50 mol%. In some embodiments of this application, the content of Al2O3, based on the molar percentage of oxides, can be: 10.50 mol%, 10.60 mol%, 10.70 mol%, 10.80 mol%, 10.90 mol%, 11.00 mol%, 11.10 mol%, 11.20 mol%, 11.30 mol%, 11.40 mol%, 11.50 mol%, 11.60 mol%, 11.70 mol%, 11.80 mol%, 11.90 mol%, 12.00 mol%, 12.10 mol%, 12.20 mol%, 12.30 mol%, 12.40 mol%, or 12.50 mol%, etc., and all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0109] In the glass system of this application, P2O5 is the glass-forming oxide, existing as phosphorus-oxygen tetrahedra [PO4] in the network structure, playing a role in forming the glass network structure. In some embodiments of this application, the content of P2O5, based on the molar percentage of the oxide, is 0.00 mol% to 1.00 mol%, preferably 0.10 mol% to 1.00 mol%. In some embodiments of this application, the content of P2O5, based on the molar percentage of the oxide, can be 0.00 mol%, 0.10 mol%, 0.20 mol%, 0.30 mol%, 0.40 mol%, 0.50 mol%, 0.60 mol%, 0.70 mol%, 0.80 mol%, 0.90 mol%, or 1.00 mol%, etc., and all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0110] In the glass system of this application, ZrO2 acts as a network intermediate. An appropriate amount of ZrO2 can improve the viscosity, Young's modulus, refractive index, chemical stability, and reduce the coefficient of thermal expansion of the glass. In some embodiments of this application, the ZrO2 content, based on the molar percentage of oxides, is 0.10 mol% to 1.10 mol%, preferably 0.20 mol% to 1.10 mol%. In some embodiments of this application, the ZrO2 content, based on the molar percentage of oxides, can be 0.10 mol%, 0.20 mol%, 0.30 mol%, 0.40 mol%, 0.50 mol%, 0.60 mol%, 0.70 mol%, 0.80 mol%, 0.90 mol%, 1.00 mol%, or 1.10 mol%, etc., and all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0111] In the glass system of this application, Na₂O is the outer oxide of the glass network, which can provide free oxygen to increase the oxygen-silicon ratio in the glass structure, thereby improving the viscosity of the glass, promoting the melting and clarification of the glass melt, increasing Na-K exchange in the glass, and achieving high CS (coefficient of thermal expansion). However, excessive Na₂O content will affect the network structure of the glass, thus affecting the stability of the glass, increasing the coefficient of thermal expansion of the glass, and consequently increasing glass warpage. In some embodiments of this application, the Na₂O content, based on the molar percentage of oxides, is 12.00 mol%-14.00 mol%, preferably 12.10 mol%-14.00 mol%. In some embodiments of this application, the Na₂O content, expressed as a molar percentage of oxides, can be 12.00 mol%, 12.10 mol%, 12.20 mol%, 12.30 mol%, 12.40 mol%, 12.50 mol%, 12.60 mol%, 12.70 mol%, 12.80 mol%, 12.90 mol%, 13.00 mol%, 13.10 mol%, 13.30 mol%, 13.40 mol%, 13.50 mol%, 13.60 mol%, 13.70 mol%, 13.80 mol%, 13.90 mol%, or 14.00 mol%, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0112] In the glass system of this application, K₂O is an oxide outside the glass network that can affect the chemical strengthening effect in the glass. In some embodiments of this application, the K₂O content, based on the molar percentage of the oxide, is 1.00 mol% to 4.00 mol%, preferably 1.10 mol% to 4.00 mol%. In some embodiments of this application, the K₂O content, based on the molar percentage of the oxide, can be 1.00 mol%, 1.10 mol%, 1.20 mol%, 1.60 mol%, 1.80 mol%, 2.00 mol%, 2.20 mol%, 2.40 mol%, 2.60 mol%, 2.80 mol%, 3.00 mol%, 3.20 mol%, 3.40 mol%, 3.60 mol%, 3.80 mol%, or 4.00 mol%, etc., and all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0113] In the glass system of this application, Li₂O is the outer oxide of the glass network, which is beneficial for improving the melt-forming effect of ultrathin glass. Replacing Na₂O with Li₂O can reduce the coefficient of thermal expansion of the glass, ensuring its warpage. In some embodiments of this application, the content of Li₂O, based on the molar percentage of the oxide, is 0.00 mol% to 3.00 mol%, preferably 0.10 mol% to 3.00 mol%. In some embodiments of this application, the content of Li₂O, based on the molar percentage of the oxide, can be: 0.00 mol%, 0.10 mol%, 0.30 mol%, 0.50 mol%, 0.70 mol%, 0.90 mol%, 1.10 mol%, 1.30 mol%, 1.50 mol%, 1.70 mol%, 1.90 mol%, 2.10 mol%, 2.30 mol%, 2.50 mol%, 2.70 mol%, 2.90 mol%, or 3.00 mol%, etc., and all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0114] In the glass system of this application, MgO can lower the glass forming temperature and improve the Young's modulus of the glass. In some embodiments of this application, the MgO content, based on the molar percentage of oxides, is 5.00 mol% to 7.00 mol%, preferably 5.10 mol% to 7.00 mol%. In some embodiments of this application, the MgO content, based on the molar percentage of oxides, can be: 5.00 mol%, 5.10 mol%, 5.20 mol%, 5.30 mol%, 5.40 mol%, 5.50 mol%, 5.60 mol%, 5.70 mol%, 5.90 mol%, 6.00 mol%, 6.10 mol%, 6.20 mol%, 6.30 mol%, 6.40 mol%, 6.50 mol%, 6.70 mol%, 6.80 mol%, 6.90 mol%, or 7.00 mol%, etc., and all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0115] In the glass system of this application, B2O3 helps to lower the melting temperature of the substrate glass and improve the light transmittance, overall uniformity, and other properties of the glass. In some embodiments of this application, the content of B2O3, based on the molar percentage of oxides, is 0.20 mol% to 1.10 mol%, preferably 0.25 mol% to 1.10 mol%. In some embodiments of this application, the content of B2O3, based on the molar percentage of oxides, can be: 0.20 mol%, 0.25 mol%, 0.30 mol%, 0.35 mol%, 0.40 mol%, 0.45 mol%, 0.50 mol%, 0.55 mol%, 0.60 mol%, 0.65 mol%, 0.70 mol%, 0.75 mol%, 0.80 mol%, 0.85 mol%, 0.90 mol%, 0.95 mol%, 1.00 mol%, 1.05 mol%, or 1.10 mol%, etc., and all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0116] In the glass system of this application, Y₂O₃ can improve the Young's modulus and chemical stability of the glass. In some embodiments of this application, the content of Y₂O₃, based on the molar percentage of oxides, is 0.00 mol% to 1.00 mol%, preferably 0.10 mol% to 1.00 mol%. In some embodiments of this application, the content of Y₂O₃, based on the molar percentage of oxides, can be: 0.00 mol%, 0.10 mol%, 0.20 mol%, 0.30 mol%, 0.40 mol%, 0.50 mol%, 0.60 mol%, 0.70 mol%, 0.80 mol%, 0.90 mol%, or 1.00 mol%, etc., and all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0117] In this application, the thickness of the ultra-thin glass does not exceed 0.70 mm. In some embodiments of this application, the thickness of the ultra-thin glass is 0.02-0.40 mm, preferably 0.03-0.30 mm. In some embodiments of this application, the thickness of the ultra-thin glass can be 0.40 mm, 0.30 mm, 0.20 mm, 0.10 mm, 0.09 mm, 0.08 mm, 0.07 mm, 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, or 0.02 mm, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0118] This application utilizes the principle that ultrathin glass reduces its coefficient of thermal expansion through its own structural composition, thereby reducing the warpage of the resulting reinforced, impact-resistant ultrathin glass. In some embodiments of this application, the average linear coefficient of thermal expansion of the ultrathin glass is ≤94×10⁻⁶. -7 / ℃, preferably 83×10 -7 / ℃-94×10 -7 / ℃. In some embodiments of this application, the average linear thermal expansion coefficient of the ultrathin glass can be 83×10⁻⁶. -7 / ℃, 85×10 -7 / ℃, 87×10 -7 / ℃, 88×10 -7 / ℃, 89×10 -7 / ℃, 90×10 -7 / ℃, 91×10 -7 / ℃, 92×10 -7 / ℃, 93×10 -7 / ℃ or 94×10 -7 / ℃, etc., and all ranges and subranges between the above values. It should be understood that, in the implementation, any of the above ranges can be combined with any other range.

[0119] In some embodiments of this application, the Young's modulus of the ultrathin glass is not less than 72.0 GPa, preferably not less than 73.0 GPa. In some embodiments of this application, the Young's modulus of the ultrathin glass is between 72.0 GPa and 85.0 GPa. In some embodiments of this application, the Young's modulus of the ultrathin glass can be 72.0 GPa, 73.0 GPa, 74.0 GPa, 75.0 GPa, 76.0 GPa, 77.0 GPa, 78.0 GPa, 78.6 GPa, 79.0 GPa, 79.5 GPa, 80.0 GPa, 81.0 GPa, 82.0 GPa, 83.0 GPa, 84.0 GPa, or 85.0 GPa, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0120] In some embodiments of this application, the ultrathin glass with a thickness of 0.70 mm has a light transmittance of ≥91.0% at 550 nm. In some embodiments of this application, the ultrathin glass with a thickness of 0.70 mm has a light transmittance of 91.0%-93.0% at 550 nm.

[0121] Secondly, this application provides a method for preparing ultrathin glass as described above, comprising the following steps:

[0122] The raw materials for glass preparation are mixed, melted, shaped in one step, and then annealed to obtain ultrathin glass.

[0123] The mixing process involves mixing the raw materials used to prepare glass in a container using existing mixing methods, such as stirring. The stirring speed and the temperature and atmosphere during the stirring process are the same as those in existing glass preparation processes, such as room temperature and air environment. Appropriate heating can also be carried out during the mixing process.

[0124] In the preparation method of this application, the melting temperature is 1300℃-1700℃, and the melting time is 4h-240h. In some embodiments of this application, the melting temperature can be 1300℃, 1350℃, 1400℃, 1450℃, 1500℃, 1550℃, 1600℃, 1650℃, or 1700℃, as well as all ranges and subranges between the above values. In some embodiments of this application, the melting time can be 4h, 5h, 6h, 7h, 8h, 9h, 10h, 11h, 12h, 13h, 14h, 15h, 16h, 17h, 18h, 19h, 20h, 23h, 24h, 28h, 30h, 35h, 40h, 43h, 48h, 50h, 55h, 58h, 60h, 65h, 68h, 70h, 75h, 80h, 85h, 88h, 90h, 95h. 98h, 100h, 105h, 110h, 115h, 120h, 125h, 130h, 135h, 140h, 145h, 150h, 155h, 160h, 165h, 170h, 175h, 180h, 185h, 190h, 195h, 200h, 205h, 210h, 215h, 220h, 225h, 230h, 235h, or 240h, and all ranges and subranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0125] In the preparation method of this application, the annealing temperature is 550℃-650℃, and the annealing time is 1min-1440min. In some embodiments of this application, the annealing temperature can be 550℃, 560℃, 570℃, 580℃, 590℃, 600℃, 610℃, 620℃, 630℃, 640℃, or 650℃, as well as all ranges and subranges between the above values. In some embodiments of this application, the annealing time can be 1 min, 10 min, 20 min, 30 min, 50 min, 80 min, 100 min, 150 min, 180 min, 200 min, 250 min, 280 min, 300 min, 350 min, 380 min, 400 min, 450 min, 480 min, 500 min, 550 min, 600 min, 650 min, 700 min, 750 min, 800 min, 850 min, 900 min, 950 min, 980 min, 1000 min, 1050 min, 1100 min, 1150 min, 1200 min, 1250 min, 1300 min, 1350 min, 1400 min, 1420 min, or 1440 min, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0126] In the preparation method of this application, the one-time molding can be any of the existing one-time glass molding processes, such as narrow-slit drawing, overflow drawing, secondary thinning, and float glass. In some embodiments of this application, one-time molding includes any of narrow-slit drawing, overflow drawing, secondary thinning, and float glass.

[0127] Thirdly, this application provides a reinforced impact-resistant ultrathin glass with a thickness of t, which includes a double-sided reinforcing layer and a tensile stress layer. The reinforcing layers extend from the surface of the reinforced impact-resistant ultrathin glass in the inward direction, wherein the double-sided reinforcing layers are symmetrically distributed, and the thickness of each reinforcing layer is not higher than 0.28t.

[0128] The central region of the tensile stress layer comprises the following components, by molar percentage of oxides:

[0129] SiO2: 63.50-66.00 mol%;

[0130] Al2O3: 10.50-12.50 mol%;

[0131] P2O5: 0.00-1.00 mol%;

[0132] Li₂O: 0.00-3.00 mol%;

[0133] Na₂O: 12.00-14.00 mol%;

[0134] K2O: 1.00-4.00 mol%;

[0135] MgO: 5.00-7.00 mol%;

[0136] Zr₂O: 0.10-1.10 mol%;

[0137] B2O3: 0.20-1.10 mol%;

[0138] Each component simultaneously satisfies the following relationships (1) to (3):

[0139] (1)11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%;

[0140] (2)6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14%

[0141] (3)4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.1.

[0142] In this application, the reinforced impact-resistant ultrathin glass is obtained by chemically strengthening the aforementioned ultrathin glass. Since chemical strengthening only occurs on the surface of the ultrathin glass body, and the thickness of the strengthened layer formed after chemical strengthening is much smaller than the thickness of the ultrathin glass, the central region of the tensile stress layer of the reinforced impact-resistant ultrathin glass is almost identical or completely identical to the glass composition of the ultrathin glass.

[0143] In some embodiments of this application, the chemical strengthening process of the reinforced impact-resistant ultrathin glass includes single-step chemical strengthening.

[0144] In some embodiments of this application, the single-step chemical fortification is carried out using a salt bath containing KNO3; preferably, in the single-step chemical fortification, the KNO3 content in the salt bath containing KNO3 is 100 wt%.

[0145] In some embodiments of this application, the temperature for single-step chemical strengthening is 380°C to 500°C, and the time for single-step chemical strengthening is 10 min to 360 min; preferably, the temperature for single-step chemical strengthening is 390°C to 500°C, more preferably 390°C; even more preferably, the time for single-step chemical strengthening is 20 min to 360 min, more preferably 90 min.

[0146] In some embodiments of this application, after chemical strengthening, the reinforced impact-resistant ultrathin glass undergoes surface strengthening treatment. In some embodiments of this application, the reinforced impact-resistant ultrathin glass is immersed in an etching solution for surface strengthening treatment, preferably the etching solution containing one or more of hydrofluoric acid, nitric acid, hydrochloric acid, and sulfuric acid. In some embodiments of this application, the etching solution, by mass percentage, comprises 0.1%–2% hydrofluoric acid, 0.5%–2% nitric acid, 0%–1% hydrochloric acid, 0%–1% sulfuric acid, and water; the preferred etching time is 60s–1200s; and the preferred etching temperature is 20°C–50°C.

[0147] In some embodiments of this application, the thickness t of the reinforced impact-resistant ultrathin glass is 0.02-0.40 mm, preferably 0.03-0.30 mm. In some embodiments of this application, the thickness t of the reinforced impact-resistant ultrathin glass can be 0.40 mm, 0.30 mm, 0.20 mm, 0.10 mm, 0.09 mm, 0.08 mm, 0.07 mm, 0.06 mm, 0.05 mm, 0.04 mm, 0.03 mm, or 0.02 mm, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0148] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.40 mm, its surface compressive stress CS ≥ 1100 MPa, preferably between 1100 MPa and 1300 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.40 mm, its surface compressive stress CS can be 1100 MPa, 1150 MPa, 1200 MPa, 1250 MPa, or 1300 MPa, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0149] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.30 mm, its surface compressive stress CS ≥ 1100 MPa, preferably between 1100 MPa and 1200 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.30 mm, its surface compressive stress CS can be 1100 MPa, 1150 MPa, or 1200 MPa, or any range and sub-range between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0150] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.40 mm, its surface compressive stress CS ≥ 1200 MPa; preferably, its surface compressive stress CS is 1200 MPa to 1300 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.40 mm, its surface compressive stress CS can be 1200 MPa, 1210 MPa, 1230 MPa, 1250 MPa, 1270 MPa, 1290 MPa, or 1300 MPa, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0151] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS ≥ 1100 MPa; preferably, its surface compressive stress CS is 1100 MPa to 1200 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS can be 1100 MPa, 1130 MPa, 1150 MPa, 1170 MPa, 1190 MPa, or 1200 MPa, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0152] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.10 mm, its surface compressive stress CS ≥ 1100 MPa; preferably, its surface compressive stress CS is 1100 MPa to 1200 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.10 mm, its surface compressive stress CS can be 1100 MPa, 1130 MPa, 1150 MPa, 1170 MPa, 1190 MPa, or 1200 MPa, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0153] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.07 mm, its surface compressive stress CS ≥ 960 MPa; preferably, its surface compressive stress CS is 960 MPa to 1010 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.07 mm, its surface compressive stress CS can be 960 MPa, 980 MPa, 990 MPa, 1000 MPa, or 1010 MPa, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0154] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its surface compressive stress CS ≥ 920 MPa; preferably, its surface compressive stress CS is 920 MPa to 960 MPa. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its surface compressive stress CS can be 920 MPa, 930 MPa, 940 MPa, 950 MPa, or 960 MPa, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0155] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.03 mm and 0.40 mm, its compressive stress layer depth Dol is ≤ 11.00 μm, preferably between 8.00 μm and 11.00 μm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.03 mm and 0.40 mm, its compressive stress layer depth Dol can be 8.00 μm, 8.20 μm, 8.50 μm, 8.70 μm, 8.90 μm, 9.00 μm, 9.20 μm, 9.40 μm, 9.60 μm, 9.80 μm, 10.00 μm, 10.10 μm, 10.30 μm, 10.50 μm, 10.70 μm, 10.90 μm, or 11.00 μm, as well as all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0156] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.30 mm, its compressive stress layer depth Dol is ≤ 11.00 μm, preferably between 8.00 μm and 11.00 μm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is between 0.10 mm and 0.30 mm, its compressive stress layer depth Dol can be 8.00 μm, 8.20 μm, 8.50 μm, 8.70 μm, 8.90 μm, 9.00 μm, 9.20 μm, 9.40 μm, 9.60 μm, 9.80 μm, 10.00 μm, 10.10 μm, 10.30 μm, 10.50 μm, 10.70 μm, 10.90 μm, or 11.00 μm, as well as all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0157] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol is ≤ 11.00 μm, preferably 8.00 μm to 11.00 μm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol can be 8.00 μm, 8.20 μm, 8.50 μm, 8.70 μm, 8.90 μm, 9.00 μm, 9.20 μm, 9.40 μm, 9.60 μm, 9.80 μm, 10.00 μm, 10.10 μm, 10.30 μm, 10.50 μm, 10.70 μm, 10.90 μm, or 11.00 μm, as well as all ranges and subranges between the above values. It should be understood that, in the implementation plan, any of the above scopes can be combined with any other scopes.

[0158] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.03mm and 0.40mm, its average pen drop height is ≥60mm, preferably between 60.00mm and 250.00mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.10mm and 0.40mm, its average pen drop height can be 60.00mm, 64.00mm, 68.00mm, 70.00mm, 73.00mm, 75.00mm, 78.00mm, 80.00mm, 82.00mm, 84.00mm, 88.00mm, 90.00mm, or 93.00mm. The values ​​are 95.00mm, 97.00mm, 99.00mm, 100.00mm, 120.00mm, 140.00mm, 160.00mm, 180.00mm, 190.00mm, 200.00mm, 210.00mm, 220.00mm, 230.00mm, 240.00mm, or 250.00mm, as well as all ranges and sub-ranges between the above values. It should be understood that, in the implementation scheme, any of the above ranges can be combined with any other range.

[0159] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its average pen drop height is ≥200.00 mm, preferably 200.00 mm to 250.00 mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its average pen drop height can be 200.00 mm, 210.00 mm, 220.00 mm, 230.00 mm, 240.00 mm, or 250.00 mm, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0160] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.10 mm, its average pen drop height is ≥74.00 mm, preferably between 74.00 mm and 92.00 mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.10 mm, its average pen drop height can be 74.00 mm, 78.00 mm, 80.00 mm, 82.00 mm, 84.00 mm, 88.00 mm, 90.00 mm, 91.00 mm, or 92.00 mm, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0161] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.07 mm, its average pen drop height is ≥74.00 mm, preferably between 74.00 mm and 84.00 mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.07 mm, its average pen drop height can be 74.00 mm, 75.00 mm, 77.00 mm, 79.00 mm, 80.00 mm, 81.00 mm, 82.00 mm, 83.00 mm, or 84.00 mm, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0162] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its average pen drop height is ≥60.00 mm, preferably between 60.00 mm and 71.00 mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its average pen drop height can be 60.00 mm, 62.00 mm, 64.00 mm, 66.00 mm, 68.00 mm, 70.00 mm, or 71.00 mm, as well as all ranges and sub-ranges between these values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0163] In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature for bending is ≤0.40 mm; preferably, its critical radius of curvature for bending is 0.30 mm to 0.40 mm. In some embodiments of this application, when the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature for bending can be 0.30 mm, 0.32 mm, 0.35 mm, 0.37 mm, 0.39 mm, or 0.40 mm, etc., as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0164] In some embodiments of this application, the warpage value of the reinforced impact-resistant ultrathin glass is no more than 0.08 mm, preferably 0.01 mm to 0.08 mm. In some embodiments of this application, the warpage value of the reinforced impact-resistant ultrathin glass can be 0.01 mm, 0.02 mm, 0.03 mm, 0.04 mm, 0.05 mm, 0.06 mm, or 0.08 mm, as well as all ranges and sub-ranges between the above values. It should be understood that, in embodiments, any of the above ranges can be combined with any other range.

[0165] Fourthly, this application provides an application of the ultra-thin glass as described above, or the ultra-thin glass prepared by the above method, or the ultra-thin glass with enhanced impact resistance as described above, in the field of electronic products; particularly in the application of displays for foldable electronic devices, such as color filters, filter printing electronic devices, sensors for touch panels, fingerprint sensors, thin-film battery substrates, mobile electronic devices, semiconductor interlayers, flexible / foldable displays, solar cells, or displays.

[0166] Fifthly, this application also provides an electronic device; the electronic device includes the ultra-thin glass described above, or the ultra-thin glass prepared by the method described above, or the reinforced impact-resistant ultra-thin glass described above. The impact-resistant ultra-thin glass can be applied to its display screen or glass cover, and the electronic device can be at least one of mobile phones, tablet computers, handheld game consoles, portable digital devices (e.g., digital cameras), vehicle central control systems, electronic whiteboard glass, smart home devices, and smart wearables (e.g., smart bracelets, smartwatches, smart glasses).

[0167] Sixthly, this application also provides a glass article; the glass article includes ultra-thin glass as described above, ultra-thin glass prepared by the method described above, or ultra-thin glass with enhanced impact resistance as described above.

[0168] To facilitate a better understanding of the innovative aspects of this application by those skilled in the art, the technical solutions of this application are further described in detail below with reference to embodiments. The embodiments of this application described in detail below are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0169] Example 1

[0170] This embodiment provides a method for preparing ultrathin glass, which specifically includes the following steps:

[0171] According to the formula of Example 1 in Table 1, each raw material component was accurately weighed according to the proportion and thoroughly mixed to obtain a mixture. The mixture was melted at 1500℃ for 8 hours, and then a glass substrate of size 440×360mm was made by the down-drawing method. The substrate was then annealed at 550℃ for 600 minutes to obtain an ultra-thin glass substrate. The substrate was then cut into ultra-thin glass samples of 50×50×0.70mm, 50×150×0.30mm, 50×150×0.10mm, 50×150×0.07mm, 50×150×0.03mm, and 120×35×0.03mm, respectively, according to actual needs.

[0172] Examples 2-7

[0173] Examples 2 through 7 were performed under the same conditions as Example 1, except that the ultrathin glass substrates were prepared according to the formulations shown in Table 1 for Examples 2 through 7, and then cut into ultrathin glass samples of 50×50×0.70mm, 50×150×0.30mm, 50×150×0.10mm, 50×150×0.07mm, 50×150×0.03mm, and 120×35×0.03mm, as needed.

[0174] Comparative Examples 1 to 10

[0175] Comparative Examples 1 to 10 were operated under the same conditions as Example 1, except that ultrathin glass substrates were prepared according to the formulation shown in Table 2, and then cut into comparative ultrathin glass samples of 50×50×0.70mm, 50×150×0.30mm, 50×150×0.10mm, 50×150×0.07mm, 50×150×0.03mm, and 120×35×0.03mm, as needed.

[0176] The performance of the 50×50×0.70mm ultrathin glass samples of Examples 1 to 7 and the comparative ultrathin glass samples of Comparative Examples 1 to 10 were tested respectively, and the results are shown in Table 1 and Table 2 respectively.

[0177] The 50×150×0.30mm ultrathin glass samples of Examples 1-7 and the 50×150×0.30mm comparative ultrathin glass samples of Comparative Examples 1-10 were trimmed to eliminate microcracks at the edges. Then, they were chemically strengthened in 100% KNO3 at 390℃ for 120 minutes. The performance of the strengthened ultrathin glass samples was tested and is shown in Tables 3-4.

[0178] The 50×150×0.10mm ultrathin glass samples of Examples 1-7 and the comparative ultrathin glass samples of Comparative Examples 1-10 were trimmed to eliminate microcracks at the edges. Then, they were chemically strengthened in 100% KNO3 at 390℃ for 120 min. The performance of the strengthened ultrathin glass samples was tested and is shown in Tables 5-6.

[0179] The ultrathin glass samples with diameters of 50×150×0.07mm and 50×150×0.03mm, as well as the comparative ultrathin glass samples with diameters of 50×150×0.07mm and 50×150×0.03mm from Comparative Examples 1-10, were trimmed to eliminate micro-cracks at the edges. Then, they were chemically strengthened in 100% KNO3 at 390℃ for 90 minutes. The performance of the strengthened ultrathin glass samples was tested, as shown in Tables 5-6.

[0180] The 120×35×0.03mm ultrathin glass samples obtained in Examples 1-7 and the comparative ultrathin glass samples of 120×35×0.03mm from Comparative Examples 1-10 were trimmed to eliminate microcracks at the edges. Then, they were chemically strengthened in 100% KNO3 at 390℃ for 90 minutes. The strengthened ultrathin glass samples and the comparative ultrathin glass samples were then placed in an etching solution for surface hardening treatment. This etching solution, by mass percentage, included 0.7% HF, 0.8% HNO3, and water. The etching time was 100 seconds, and the etching temperature was 24℃. Subsequently, the ultrathin glass samples after surface hardening treatment were ultrasonically cleaned to obtain the required ultrathin glass samples for testing. The performance of the aforementioned ultrathin glass samples for testing is shown in Tables 7-8.

[0181] As can be seen from Tables 1 and 2, the ultrathin glass prepared in the embodiments of this application has a very high Young's modulus, which can reach at least 73.50 GPa, and even 81.9 GPa.

[0182] As shown in Tables 3 and 4, the ultrathin glass samples provided in this application, after chemical strengthening, exhibit a lower compressive stress layer depth (Dol) of 8-10 μm compared to the comparative ultrathin glass samples that have also undergone strengthening. The surface compressive stress (CS) is also higher; the surface compressive stress (CS) of the 0.3 mm thick strengthened ultrathin glass sample in this application can reach over 1140 MPa. Furthermore, the average pen drop height is significantly increased, by at least 40% compared to the comparative sample, reaching over 220 mm. Therefore, the strengthened ultrathin glass provided in this application has better impact resistance.

[0183] As can be seen from Tables 5 and 6, the reinforced ultrathin glass provided in this application embodiment exhibits extremely good surface compressive stress even at very low thicknesses, such as 0.10 mm, 0.07 mm, and 0.03 mm. In fact, the surface compressive stress of the 0.03 mm thick reinforced ultrathin glass is already no less than that of the comparative reinforced ultrathin glass sample with a thickness of 0.07 mm. Similarly, the reinforced ultrathin glass provided in this application embodiment exhibits extremely good impact resistance even at very low thicknesses, such as 0.10 mm, 0.07 mm, and 0.03 mm. The impact resistance of the 0.07 mm thick reinforced ultrathin glass is already close to that of the comparative reinforced ultrathin glass sample with a thickness of 0.10 mm, providing significant material support for the thinning and lightening of electronic devices.

[0184] As can be seen from Tables 7 and 8, the bending strength of the reinforced ultrathin glass provided in this application has been significantly improved. Even with an extremely low thickness, it still has a critical bending radius of curvature as low as 0.40 mm, which provides great material support for the service life of electronic devices with frequently folded displays.

[0185] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this invention should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0186]

[0187]

[0188]

[0189]

[0190]

[0191]

[0192]

[0193]

Claims

1. An ultrathin glass, characterized in that, The composition, by mole percentage of oxides, includes the following components: SiO2: 63.50-66.00 mol% Al2O3: 10.50-12.50 mol% P2O5: 0.00-1.00 mol% Li₂O: 0.00-3.00 mol% Na₂O: 12.00-14.00 mol% K2O: 1.00-4.00 mol% MgO: 5.00-7.00 mol% Zr₂O: 0.10-1.10 mol% B2O3: 0.20-1.10 mol% Each component simultaneously satisfies the following relationships (1) to (3): (1) 11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%; (2) 6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14% (3) 4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.

1.

2. The ultrathin glass according to claim 1, characterized in that, The content of SiO2 is 64.00 mol% to 66.00 mol%; and / or, the content of Al2O3 is 11.00 mol% to 12.50 mol%; and / or, the content of P2O5 is 0.10 mol% to 1.00 mol%; and / or, the content of Li2O is 0.10 mol% to 3.00 mol%; and / or, the content of Na2O is 12.10 mol% to 14.00 mol%; and / or, the content of K2O is 1.10 mol% to 4.00 mol%; and / or, the content of MgO is 5.10 mol% to 7.00 mol%; and / or, the content of ZrO2 is 0.20 mol% to 1.10 mol%; and / or, the content of B2O3 is 0.25 mol% to 1.10 mol%.

3. The ultrathin glass according to claim 1 or 2, characterized in that, The thickness of the ultrathin glass is 0.02-0.40 mm.

4. The ultrathin glass according to claim 1 or 2, characterized in that, The thickness of the ultrathin glass is 0.03-0.30 mm.

5. The ultrathin glass according to claim 1 or 2, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is ≤94×10⁻⁶. -7 / ℃.

6. The ultrathin glass according to claim 3, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is ≤94×10⁻⁶. -7 / ℃.

7. The ultrathin glass according to claim 4, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is ≤94×10⁻⁶. -7 / ℃.

8. The ultrathin glass according to claim 1 or 2, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is 83 × 10⁻⁶. -7 / ℃-94×10 -7 / ℃.

9. The ultrathin glass according to claim 3, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is 83 × 10⁻⁶. -7 / ℃-94×10 -7 / ℃.

10. The ultrathin glass according to claim 4, characterized in that, The average linear thermal expansion coefficient of the ultrathin glass is 83 × 10⁻⁶. -7 / ℃-94×10 -7 / ℃.

11. The ultrathin glass according to claim 1 or 2, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

12. The ultrathin glass according to claim 3, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

13. The ultrathin glass according to claim 4, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

14. The ultrathin glass according to claim 5, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

15. The ultrathin glass according to any one of claims 6-7 and 9-10, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

16. The ultrathin glass according to claim 8, characterized in that, The ultrathin glass has a Young's modulus of not less than 72.0 GPa; and / or The ultrathin glass, with a thickness of 0.70 mm, has a light transmittance of ≥91.0% at 550 nm.

17. The method for preparing ultrathin glass according to any one of claims 1 to 16, characterized in that: The raw materials for glass preparation are mixed, melted, shaped in one step, and then annealed to obtain ultrathin glass.

18. The method for preparing ultrathin glass according to claim 17, characterized in that, The melting temperature is 1300℃-1700℃, and the melting time is 4h-240h; and / or The annealing temperature is 550℃-650℃, and the annealing time is 1 min-1440 min; and / or The primary forming process is selected from any one of narrow slit drawing, overflow drawing, secondary thinning, and float glass.

19. A reinforced impact-resistant ultrathin glass with a thickness of t, comprising a double-sided reinforcing layer and a tensile stress layer, wherein the reinforcing layers extend from the surface of the reinforced impact-resistant ultrathin glass in an inward direction, wherein the double-sided reinforcing layers are symmetrically distributed, and the thickness of each reinforcing layer is not higher than 0.28t; The central region of the tensile stress layer comprises the following components, by molar percentage of oxides: SiO2: 63.50-66.00 mol % % Al2O3: 10.50-12.50 mol % % P2O5: 0.00-1.00 mol% Li₂O: 0.00-3.00 mol% Na₂O: 12.00-14.00 mol% K2O: 1.00-4.00 mol% MgO: 5.00-7.00 mol% Zr₂O: 0.10-1.10 mol% B2O3: 0.20-1.10 mol% in, Each component simultaneously satisfies the following relationships (1) to (3): (1) 11.00%≤((Li2O)+(K2O)) / ((Al2O3)+(Na2O))≤20%; (2) 6%≤((ZrO2)+(Li2O)+(MgO)) / ((Na2O)+(K2O)+(SiO2))≤14% (3) 4.1≤((B2O3)+(SiO2)+(ZrO2)) / ((K2O)+(Na2O))≤5.

1.

20. The reinforced impact-resistant ultrathin glass according to claim 19, characterized in that, The thickness t of the reinforced impact-resistant ultrathin glass is 0.02-0.40 mm.

21. The reinforced impact-resistant ultrathin glass according to claim 19, characterized in that, The thickness t of the reinforced impact-resistant ultrathin glass is 0.03-0.30 mm.

22. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, The chemical strengthening process of the reinforced impact-resistant ultrathin glass includes single-step chemical strengthening.

23. The reinforced impact-resistant ultrathin glass according to claim 22, characterized in that, In the single-step chemical enhancement, a salt bath containing KNO3 is used for chemical enhancement.

24. The reinforced impact-resistant ultrathin glass according to claim 22, characterized in that, In the single-step chemical fortification, the KNO3 content in the salt bath containing KNO3 is 100 wt%.

25. The reinforced impact-resistant ultrathin glass according to claim 22, characterized in that, The temperature for single-step chemical strengthening is 380℃~500℃, and the time for single-step chemical strengthening is 10min~360min.

26. The reinforced impact-resistant ultrathin glass according to claim 22, characterized in that, The temperature for single-step chemical intensification is 390℃~500℃; the time for single-step chemical intensification is 20min~360min.

27. The reinforced impact-resistant ultrathin glass according to claim 22, characterized in that, The temperature for single-step chemical intensification was 390℃; the time for single-step chemical intensification was 90 min.

28. The reinforced impact-resistant ultrathin glass according to claim 23, characterized in that, The temperature for single-step chemical strengthening is 380℃~500℃, and the time for single-step chemical strengthening is 10min~360min.

29. The reinforced impact-resistant ultrathin glass according to claim 23, characterized in that, The temperature for single-step chemical intensification is 390℃~500℃; the time for single-step chemical intensification is 20min~360min.

30. The reinforced impact-resistant ultrathin glass according to claim 23, characterized in that, The temperature for single-step chemical intensification was 390℃; the time for single-step chemical intensification was 90 min.

31. The reinforced impact-resistant ultrathin glass according to claim 24, characterized in that, The temperature for single-step chemical strengthening is 380℃~500℃, and the time for single-step chemical strengthening is 10min~360min.

32. The reinforced impact-resistant ultrathin glass according to claim 24, characterized in that, The temperature for single-step chemical intensification is 390℃~500℃; the time for single-step chemical intensification is 20min~360min.

33. The reinforced impact-resistant ultrathin glass according to claim 24, characterized in that, The temperature for single-step chemical intensification was 390℃; the time for single-step chemical intensification was 90 min.

34. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.10-0.40 mm, the surface compressive stress CS ≥ 1100 MPa.

35. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.10-0.40 mm, its surface compressive stress CS is 1100 MPa to 1300 MPa.

36. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS ≥ 1100 MPa.

37. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS is 1100 MPa~1200 MPa.

38. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.10-0.40 mm, the surface compressive stress CS ≥ 1100 MPa.

39. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.10-0.40 mm, its surface compressive stress CS is 1100 MPa to 1300 MPa.

40. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS ≥ 1100 MPa.

41. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its surface compressive stress CS is 1100 MPa~1200 MPa.

42. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is between 0.03mm and 0.40mm, its compressive stress layer depth Dol ≤ 11.00μm.

43. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03mm-0.40mm, its compressive stress layer depth Dol is 8.00μm~11.00μm.

44. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol ≤ 11.00 μm.

45. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol is 8.00 μm to 11.00 μm.

46. ​​The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is between 0.03mm and 0.40mm, its compressive stress layer depth Dol ≤ 11.00μm.

47. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03mm-0.40mm, its compressive stress layer depth Dol is 8.00μm~11.00μm.

48. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol ≤ 11.00 μm.

49. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.30 mm, its compressive stress layer depth Dol is 8.00 μm to 11.00 μm.

50. The reinforced impact-resistant ultrathin glass according to claim 34, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

51. The reinforced impact-resistant ultrathin glass according to claim 34, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

52. The reinforced impact-resistant ultrathin glass according to claim 35, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

53. The reinforced impact-resistant ultrathin glass according to claim 35, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

54. The reinforced impact-resistant ultrathin glass according to claim 36, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

55. The reinforced impact-resistant ultrathin glass according to claim 36, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

56. The reinforced impact-resistant ultrathin glass according to claim 37, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

57. The reinforced impact-resistant ultrathin glass according to claim 37, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

58. The reinforced impact-resistant ultrathin glass according to claim 38, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

59. The reinforced impact-resistant ultrathin glass according to claim 38, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

60. The reinforced impact-resistant ultrathin glass according to claim 39, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

61. The reinforced impact-resistant ultrathin glass according to claim 39, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

62. The reinforced impact-resistant ultrathin glass according to claim 40, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

63. The reinforced impact-resistant ultrathin glass according to claim 40, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

64. The reinforced impact-resistant ultrathin glass according to claim 41, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is ≤11.00μm.

65. The reinforced impact-resistant ultrathin glass according to claim 41, characterized in that, The compressive stress layer depth Dol of the reinforced impact-resistant ultrathin glass is 8.00 μm to 11.00 μm.

66. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.03mm and 0.40mm, its average pen drop height is ≥60mm.

67. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.03mm and 0.40mm, its average pen drop height is 60.00mm to 250.00mm.

68. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is 0.30mm, its average pen drop height is ≥200.00mm.

69. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is 0.30mm, its average pen drop height is 200.00mm to 250.00mm.

70. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.03mm and 0.40mm, its average pen drop height is ≥60mm.

71. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is between 0.03mm and 0.40mm, its average pen drop height is 60.00mm to 250.00mm.

72. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is 0.30mm, its average pen drop height is ≥200.00mm.

73. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultra-thin glass is 0.30mm, its average pen drop height is 200.00mm to 250.00mm.

74. The reinforced impact-resistant ultrathin glass according to claim 34, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

75. The reinforced impact-resistant ultrathin glass according to claim 34, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

76. The reinforced impact-resistant ultrathin glass according to claim 35, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

77. The reinforced impact-resistant ultrathin glass according to claim 35, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

78. The reinforced impact-resistant ultrathin glass according to claim 36, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

79. The reinforced impact-resistant ultrathin glass according to claim 36, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

80. The reinforced impact-resistant ultrathin glass according to claim 37, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

81. The reinforced impact-resistant ultrathin glass according to claim 37, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

82. The reinforced impact-resistant ultrathin glass according to claim 38, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

83. The reinforced impact-resistant ultrathin glass according to claim 38, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

84. The reinforced impact-resistant ultrathin glass according to claim 39, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

85. The reinforced impact-resistant ultrathin glass according to claim 39, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

86. The reinforced impact-resistant ultrathin glass according to claim 40, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

87. The reinforced impact-resistant ultrathin glass according to claim 40, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

88. The reinforced impact-resistant ultrathin glass according to claim 41, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

89. The reinforced impact-resistant ultrathin glass according to claim 41, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

90. The reinforced impact-resistant ultrathin glass according to claim 42, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

91. The reinforced impact-resistant ultrathin glass according to claim 42, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

92. The reinforced impact-resistant ultrathin glass according to claim 43, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

93. The reinforced impact-resistant ultrathin glass according to claim 43, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

94. The reinforced impact-resistant ultrathin glass according to claim 44, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

95. The reinforced impact-resistant ultrathin glass according to claim 44, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

96. The reinforced impact-resistant ultrathin glass according to claim 45, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

97. The reinforced impact-resistant ultrathin glass according to claim 45, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

98. The reinforced impact-resistant ultrathin glass according to claim 46, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

99. The reinforced impact-resistant ultrathin glass according to claim 46, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

100. The reinforced impact-resistant ultrathin glass according to claim 47, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥60mm.

101. The reinforced impact-resistant ultrathin glass according to claim 47, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 60.00mm to 250.00mm.

102. The reinforced impact-resistant ultrathin glass according to claim 48, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

103. The reinforced impact-resistant ultrathin glass according to claim 48, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

104. The reinforced impact-resistant ultrathin glass according to claim 49, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is ≥200mm.

105. The reinforced impact-resistant ultrathin glass according to claim 49, characterized in that, The average pen drop height of the reinforced impact-resistant ultra-thin glass is 200.00mm to 250.00mm.

106. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature for bending is ≤0.40 mm.

107. The reinforced impact-resistant ultrathin glass according to any one of claims 19 to 21, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature is 0.30 mm to 0.40 mm.

108. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature for bending is ≤0.40 mm.

109. The reinforced impact-resistant ultrathin glass according to any one of claims 23 to 33, characterized in that, When the thickness t of the reinforced impact-resistant ultrathin glass is 0.03 mm, its critical radius of curvature is 0.30 mm to 0.40 mm.

110. The application of the ultrathin glass as described in any one of claims 1 to 16, or the ultrathin glass prepared by the method described in any one of claims 17 to 18, or the reinforced impact-resistant ultrathin glass as described in any one of claims 19 to 109, in the field of electronic products.

111. An electronic device, characterized in that, The ultrathin glass includes the ultrathin glass prepared by the method of preparing the ultrathin glass as described in any one of claims 1 to 16, or the ultrathin glass prepared by the method of preparing the ultrathin glass as described in any one of claims 17 to 18, or the reinforced impact-resistant ultrathin glass as described in any one of claims 19 to 109.

112. A glass article, characterized in that, The ultrathin glass includes the ultrathin glass prepared by the method of preparing the ultrathin glass as described in any one of claims 1 to 16, or the ultrathin glass prepared by the method of preparing the ultrathin glass as described in any one of claims 17 to 18, or the reinforced impact-resistant ultrathin glass as described in any one of claims 19 to 109.

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