Strengthened glass and glass compositions and applications

Abstract

This invention provides a reinforced glass and a glass composition with high hardness and light transmittance, as well as their applications. The reinforced glass, with components expressed as weight percentages, contains: SiO2: 30–50%; Al2O3: 13–27%; ZrO2: 1–12%; Y2O3: 15–32%; Li2O: 1–10%, wherein the Y2O3 / Al2O3 ratio is 0.70–2.00. Through rational component design, the reinforced glass of this invention exhibits high hardness and light transmittance, meeting the application requirements of high-performance electronic devices and display devices.

Description

Technical Field

[0001] This invention relates to a glass, and more particularly to a reinforced glass with high hardness and light transmittance, as well as glass compositions and applications. Background Technology

[0002] With the development of the times, glass, as a widely used material, has penetrated into all aspects of people's lives. In recent years, the rapid development and popularization of electronic and display devices have placed higher demands on the glass used in them. Especially in fields such as smartphones, smart wearable devices, automotive imaging, and security monitoring, glass is highly dependent on imaging systems and protective covers. As glass for imaging systems, or protective glass for the displays of electronic and display devices, it is required to have high light transmittance to improve light transmission and enhance imaging and display effects. Furthermore, electronic and display devices inevitably encounter impacts or drops during use. Protective glass, therefore, is required to have high hardness to withstand these impacts or drops, effectively protecting the internal electronic components. Therefore, developing glass with high hardness and high light transmittance is of great significance to the development of electronic devices, display devices, automotive imaging, and security monitoring. Summary of the Invention

[0003] Based on the above reasons, the technical problem to be solved by the present invention is to provide a reinforced glass with high hardness and light transmittance.

[0004] The technical solution adopted by this invention to solve the technical problem is:

[0005] (1) The composition of the tempered glass is expressed as a weight percentage, containing: SiO2: 30% to 50%; Al2O3: 13% to 27%; ZrO2: 1% to 12%; Y2O3: 15% to 32%; Li2O: 1% to 10%, of which Y2O3 / Al2O3 is 0.70 to 2.00.

[0006] (2) The tempered glass according to (1) further comprises, by weight percentage: La2O3: 0-8%; and / or Gd2O3: 0-5%; and / or Na2O: 0-3%; and / or K2O: 0-2%; and / or RO: 0-5%; and / or B2O3: 0-4%; and / or TiO2: 0-4%; and / or clarifying agent: 0-2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0007] (3) A tempered glass containing SiO2, Al2O3, ZrO2, Y2O3, and Li2O, the composition of which is expressed as a weight percentage, wherein the Y2O3 / Al2O3 ratio is 0.70 to 2.00, and the Vickers hardness of the tempered glass is 720 kgf / mm. 2 above.

[0008] (4) The tempered glass according to (3) comprises, by weight percentage: SiO2: 30%–50%; and / or Al2O3: 13%–27%; and / or ZrO2: 1%–12%; and / or Y2O3: 15%–32%; and / or Li2O: 1%–10%; and / or La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0009] (5) The tempered glass according to any one of (1) to (4), wherein the composition is expressed as a weight percentage, wherein: Y2O3 / Al2O3 is 0.80 to 1.80, optionally Y2O3 / Al2O3 is 0.90 to 1.50; and / or ZrO2 / Y2O3 is 0.06 to 0.60, optionally ZrO2 / Y2O3 is 0.10 to 0.58, more preferably ZrO2 / Y2O3 is 0.13 to 0.48, further preferably ZrO2 / Y2O3 is 0.15 to 0.38; and / or SiO2 / (Y2O3+La2O3) is 0.80 to 2.80, optionally SiO2 / (Y2O3+La2O3) is 1.00 to 2.20, more preferably SiO2 / (Y2O3+La2O3) is 1.20 to 1.90.

[0010] (6) The tempered glass according to any one of (1) to (4), wherein the composition is expressed as a weight percentage, wherein: Li2O / ZrO2 is 0.20 to 3.00, optionally Li2O / ZrO2 is 0.40 to 2.50, more preferably Li2O / ZrO2 is 0.45 to 2.00, and further preferably Li2O / ZrO2 is 0.50 to 1.80; and / or (Li2O+Y2O3+Al2O3) / SiO2 is 0.80 to 2.10, optionally (Li2O+Y2O3+Al2O3) / SiO2 is 0.80 to 2.10. The ratio of (Li2O+Y2O3+Al2O3) / SiO2 is 1.00 to 2.00, and more preferably (Li2O+Y2O3+Al2O3) / SiO2 is 1.20 to 1.70; and / or (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.35 to 1.00, and more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.40 to 0.90, and more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.50 to 0.80.

[0011] (7) The tempered glass according to any one of (1) to (4), wherein the composition is expressed as a weight percentage, wherein: SiO2: 32% to 47%, optionally SiO2: 36% to 44%; and / or Al2O3: 16% to 25%, optionally Al2O3: 18% to 24%; and / or ZrO2: 2% to 10%, optionally ZrO2: 3% to 8%; and / or Y2O3: 18% to 30%, optionally Y2O3: 20% to 27%; and / or Li2O: 1.5% to 9%, optionally Li2O: 2% to 8%; and / or La2O3: 0% to 6%, optionally La2O3: 0% to 5%; and / or Gd2O3: 0% to 3%, optionally Gd2O3: 0% to 1%, and more preferably not containing Gd2O3; and / or Na2O: greater than 0 but less than or equal to 2%, optional Na2O: greater than 0 but less than or equal to 1%; and / or K2O: greater than 0 but less than or equal to 1%, optional K2O: greater than 0 but less than or equal to 0.5%; and / or RO: 0 to 3%, optional RO: 0 to 2%; and / or B2O3: 0 to 2%, optional B2O3: 0 to 1%, more preferably without B2O3; and / or TiO2: 0 to 2%, optional TiO2: 0 to 1%; and / or clarifying agent: 0 to 1%, optional clarifying agent: 0 to 0.5%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0012] (8) The tempered glass according to any one of (1) to (4), wherein the surface stress of the tempered glass is 400 MPa or more, optionally 450 MPa or more, more preferably 480 MPa or more, and even more preferably 500 MPa or more; and / or the ion exchange layer depth is 80 μm or more, optionally 90 μm or more, more preferably 95 μm or more, and even more preferably 100 μm or more; and / or the drop ball test height is 1500 mm or more, optionally 1600 mm or more, and even more preferably 1700 mm or more; and / or the fracture toughness is 0.7 MPa·m 1 / 2 The above can be selected as 0.8 MPa·m 1 / 2 The above can also be selected as 0.9 MPa·m 1 / 2 The above; and / or a four-point bending strength of 750 MPa or higher, optionally 780 MPa or higher, and even more preferably 820 MPa or higher; and / or a Vickers hardness of 720 kgf / mm². 2 The above can be selected as 730 kgf / mm 2 The above can also be selected as 740kgf / mm 2 The above; and / or drop resistance of 700mm or more, with 800mm or more optional, and 900mm or more optional; and / or compressive strength of 1200N or more, with 1300N or more optional, and 1400N or more optional.

[0013] (9) The tempered glass according to any one of (1) to (4), the tempered glass with a thickness of less than 1 mm, has an average light transmittance of 88% or more at a wavelength of 400 to 800 nm, optionally 89% or more, and more preferably 90% or more; and / or the tempered glass with a thickness of less than 1 mm, has a light transmittance of 89% or more at a wavelength of 550 nm, optionally 90% or more, and more preferably 91% or more.

[0014] (10) The tempered glass according to (9) has a thickness of 0.2 to 1 mm, optionally 0.3 to 0.9 mm, more preferably 0.5 to 0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm.

[0015] (11) A glass composition, the components of which are expressed in weight percentage as: SiO2: 30% to 50%; Al2O3: 13% to 27%; ZrO2: 1% to 12%; Y2O3: 15% to 32%; Li2O: 1% to 10%, wherein the ratio of Y2O3 to Al2O3 is 0.70 to 2.00.

[0016] (12) The glass composition according to (11), wherein the components are expressed in weight percentages, further comprises: La2O3: 0-8%; and / or Gd2O3: 0-5%; and / or Na2O: 0-3%; and / or K2O: 0-2%; and / or RO: 0-5%; and / or B2O3: 0-4%; and / or TiO2: 0-4%; and / or clarifying agent: 0-2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0017] (13) A glass composition comprising SiO2, Al2O3, ZrO2, Y2O3, and Li2O, wherein the components are expressed as weight percentages, wherein the ratio of Y2O3 to Al2O3 is 0.70 to 2.00, and the Vickers hardness of the glass composition is 690 kgf / mm. 2 above.

[0018] (14) The glass composition according to (13) comprises, by weight percentage: SiO2: 30%–50%; and / or Al2O3: 13%–27%; and / or ZrO2: 1%–12%; and / or Y2O3: 15%–32%; and / or Li2O: 1%–10%; and / or La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0019] (15) The glass composition according to any one of (11) to (14), wherein the components are expressed in weight percentage, wherein: Y2O3 / Al2O3 is 0.80 to 1.80, optionally Y2O3 / Al2O3 is 0.90 to 1.50; and / or ZrO2 / Y2O3 is 0.06 to 0.60, optionally ZrO2 / Y2O3 is 0.10 to 0.58, more preferably ZrO2 / Y2O3 is 0.13 to 0.48, further preferably ZrO2 / Y2O3 is 0.15 to 0.38; and / or SiO2 / (Y2O3+La2O3) is 0.80 to 2.80, optionally SiO2 / (Y2O3+La2O3) is 1.00 to 2.20, more preferably SiO2 / (Y2O3+La2O3) is 1.20 to 1.90.

[0020] (16) The glass composition according to any one of (11) to (14), wherein the components are expressed in weight percentages, wherein: Li2O / ZrO2 is 0.20 to 3.00, optionally Li2O / ZrO2 is 0.40 to 2.50, more preferably Li2O / ZrO2 is 0.45 to 2.00, and even more preferably Li2O / ZrO2 is 0.50 to 1.80; and / or (Li2O+Y2O3+Al2O3) / SiO2 is 0.80 to 2.10, optionally (Li2O+Y2O3+Al2O3) / SiO2 is 0.80 to 2.10. The ratio of (Li2O+Y2O3+Al2O3) / (SiO2) is 1.00 to 2.00, and more preferably (Li2O+Y2O3+Al2O3) / (SiO2) is 1.20 to 1.70; and / or (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.35 to 1.00, and more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.40 to 0.90, and more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.50 to 0.80.

[0021] (17) The glass composition according to any one of (11) to (14), wherein the components are expressed in weight percentages, wherein: SiO2: 32% to 47%, optionally SiO2: 36% to 44%; and / or Al2O3: 16% to 25%, optionally Al2O3: 18% to 24%; and / or ZrO2: 2% to 10%, optionally ZrO2: 3% to 8%; and / or Y2O3: 18% to 30%, optionally Y2O3: 20% to 27%; and / or Li2O: 1.5% to 9%, optionally Li2O: 2% to 8%; and / or La2O3: 0% to 6%, optionally La2O3: 0% to 5%; and / or Gd2O3: 0% to 3%, optionally Gd2O3: 0% to 3%. O3: 0-1%, optionally without Gd2O3; and / or Na2O: 0-2%, optionally Na2O: 0-1%; and / or K2O: 0-1%, optionally K2O: 0-0.5%; and / or RO: 0-3%, optionally RO: 0-2%; and / or B2O3: 0-2%, optionally B2O3: 0-1%, optionally without B2O3; and / or TiO2: 0-2%, optionally TiO2: 0-1%; and / or clarifying agent: 0-1%, optionally clarifying agent: 0-0.5%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0022] (18) The glass composition according to any one of (11) to (14), wherein the refractive index of the glass composition is 1.56 to 1.65, optionally 1.57 to 1.63, more preferably 1.58 to 1.61; and / or the body drop test height is 1400 mm or more, optionally 1500 mm or more, more preferably 1600 mm or more; and / or the Vickers hardness is 690 kgf / mm. 2 The above can be selected as 700 kgf / mm 2 The above can also be selected as 710kgf / mm 2 The above; and / or a Young's modulus of 95 GPa or higher, optionally 98 Ga or higher, and even more preferably 100 GPa or higher; and / or a coefficient of thermal expansion of 45 × 10⁻⁶. -7 / K~70×10 -7 / K, optional 50×10 -7 / K~65×10 -7 / K, or 53×10 -7 / K~63×10 -7 / K; and / or a density of 3.60 g / cm³ 3 The following can be selected as 3.50g / cm 3 The following is an alternative option: 3.40 g / cm³ 3 The following can be further selected as 2.80~3.30g / cm³. 3 .

[0023] (19) According to any one of (11) to (14), the glass composition with a thickness of less than 1 mm has an average light transmittance of 88% or more at a wavelength of 400 to 800 nm, optionally 89% or more, and more preferably 90% or more; and / or the glass composition with a thickness of less than 1 mm has a light transmittance of 89% or more at a wavelength of 550 nm, optionally 90% or more, and more preferably 91% or more.

[0024] (20) The glass composition according to (19) has a thickness of 0.2 to 1 mm, optionally 0.3 to 0.9 mm, more preferably 0.5 to 0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm.

[0025] (21) A glass preform made of any of the glass compositions described in (11) to (20).

[0026] (22) Reinforced glass, made of any of the glass compositions described in (11) to (20), or made of the glass preform described in (21).

[0027] (23) A glass element made of any of the tempered glass described in (1) to (10) or (22), or made of any of the glass compositions described in (11) to (20), or made of the glass preform described in (21).

[0028] (24) A glass cover, made of any of the tempered glass described in (1) to (10) and (22), or made of any of the glass compositions described in (11) to (20).

[0029] (25) An apparatus comprising any of the tempered glass described in (1) to (10) and (22), or comprising any of the glass compositions described in (11) to (20), or comprising the glass element described in (23), or comprising the glass cover plate described in (224).

[0030] (26) A method for manufacturing tempered glass, the method comprising the following steps: 1) forming a glass composition; 2) chemically strengthening the glass composition, or chemically strengthening the glass composition after processing it into a glass preform, wherein the chemical strengthening treatment comprises immersing the glass composition or the glass preform in molten sodium salt and / or potassium salt.

[0031] (27) According to the manufacturing method of the tempered glass described in (26), the chemical strengthening treatment includes a one-step chemical strengthening method or a multi-step chemical strengthening method. Optionally, the chemical strengthening treatment is a multi-step chemical strengthening method, and more preferably, the chemical strengthening treatment is a two-step chemical strengthening method. In the two-step chemical strengthening method, the first step of chemical strengthening is to immerse the glass composition or glass preform in a molten salt containing sodium salt. The temperature of the first step of chemical strengthening is 400-550°C, optionally 420-520°C, and more preferably 430-500°C. The time of the first step of chemical strengthening is 1-11 hours, optionally 1-9 hours, and more preferably 1-7 hours. The second step of chemical strengthening is to immerse the glass composition or glass preform after the first step of chemical strengthening in a molten salt containing potassium salt. The temperature of the second step of chemical strengthening is 420-520°C, optionally 430-500°C, and more preferably 440-490°C. The time of the second step of chemical strengthening is 10 minutes to 2.5 hours, optionally 20 minutes to 2 hours.

[0032] The beneficial effects of this invention are: through reasonable component design, the tempered glass of this invention has high hardness and light transmittance, which meets the application requirements of high-performance electronic devices and display devices.

[0033] The glass composition obtained by this invention has high hardness and light transmittance. The glass composition of this invention is suitable for chemical strengthening. The strengthened glass obtained after chemical strengthening has high hardness, light transmittance and strength. Detailed Implementation

[0034] The embodiments of the present invention will now be described in detail. However, the present invention is not limited to the embodiments described below, and appropriate modifications can be made to implement it within the scope of the purpose of the present invention. Furthermore, while there are appropriate omissions in the repeated descriptions, this does not limit the spirit of the invention. In this specification, glass before chemical strengthening is referred to as a glass composition or glass or pre-strengthened glass, and glass composition or glass preform after chemical strengthening is referred to as strengthened glass or post-strengthened glass.

[0035] [Glass compositions and tempered glass]

[0036] The component ranges of the glass composition and tempered glass of the present invention are described below. In the present invention, unless otherwise specified, the content, total content, and total amount of each component are expressed as weight percentages (wt%), that is, the weight percentage of the content, total content, and total amount of each component relative to the total amount of glass or tempered glass material converted into oxide composition. Here, "converted into oxide composition" means that when oxides, complex salts, hydroxides, etc., used as raw materials for the glass composition or tempered glass of the present invention decompose and transform into oxides upon melting, the total amount of such oxides is taken as 100%.

[0037] Unless otherwise specified in the specific context, the numerical ranges listed in this invention include upper and lower limits, and "above" and "below" include endpoint values ​​and all integers and fractions included in the range, but are not limited to the specific values ​​listed when the range is defined. The term "and / or" as used herein is inclusive; for example, "A and / or B" means only A, or only B, or both A and B.

[0038] <Essential and Optional Components>

[0039] SiO2 serves as the framework for glass compositions and strengthened glass. As a glass network generator, it maintains the chemical stability of the glass and improves its resistance to devitrification and formability. In this invention, the above effects are achieved by containing 30% or more SiO2, optionally 32% or more, and more preferably 36% or more. If the SiO2 content is too high, the Young's modulus of the glass composition and strengthened glass decreases. Therefore, the SiO2 content is 50% or less, optionally 47% or less, and more preferably 44% or less. In some embodiments, the SiO2 content can be 30%, 30.5%, 31%, 31.5%, 32%, 32.5%, 33%, 33.5%, 34%, 34.5%, 35%, 35.5%, 36%, 36.5%, 37%, 37.5%, 38%, 38.5%, 39%, 39.5%, 40%, 40.5%, 41%, 41.5%, 42%, 42.5%, 43%, 43.5%, 44%, 44.5%, 45%, 45.5%, 46%, 46.5%, 47%, 47.5%, 48%, 48.5%, 49%, 49.5%, 50%, 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.

[0040] Al2O3 is an essential component of the glass composition and strengthened glass of this invention. It can improve the chemical strengthening properties of the glass composition and increase the Young's modulus and drop ball test height of the glass composition and strengthened glass. In this invention, the above effects are achieved by containing 13% or more Al2O3. Optionally, the Al2O3 content is 16% or more, and more preferably 18% or more. If the Al2O3 content is too high, the meltability of the glass decreases, and the melting difficulty increases. Therefore, the Al2O3 content is 27% or less, optionally 25% or less, and more preferably 24% or less. In some embodiments, the Al2O3 content can be 13%, 13.5%, 14%, 14.5%, 15%, 15.5%, 16%, 16.5%, 17%, 17.5%, 18%, 18.5%, 19%, 19.5%, 20%, 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, 25%, 25.5%, 26%, 26.5%, 27%, 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.

[0041] ZrO2 is an essential component of the glass composition and strengthened glass of the present invention. It can improve the chemical strengthening properties of the glass composition and enhance the impact resistance, fracture toughness, and hardness of the glass composition and strengthened glass. The present invention achieves the above effects by containing more than 1% ZrO2, optionally more than 2%, and more preferably more than 3%. If the ZrO2 content is too high, it can easily lead to phase separation and devitrification during glass forming. Therefore, the ZrO2 content is 12% or less, optionally less than 10%, and more preferably less than 8%. In some embodiments, the ZrO2 content can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, 10.5%, 11%, 11.5%, 12%, 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.

[0042] Y₂O₃ is an essential component of the glass composition and strengthened glass of this invention, which can increase the Young's modulus and lower the melting temperature of the glass. In this invention, the above-mentioned effects are achieved by containing 15% or more Y₂O₃, optionally 18% or more, and more preferably 20% or more. On the other hand, Y₂O₃ is a component with a high electric field strength; excessively high content can hinder ion exchange during the chemical strengthening process of the glass composition, leading to a decrease in the chemical strengthening performance of the glass composition and negatively impacting the drop ball test height of the glass composition and strengthened glass. Therefore, the Y₂O₃ content is 32% or less, optionally 30% or less, and more preferably 27% or less. In some embodiments, the Y₂O₃ content can be 15%, 15.5%, 16%, 16.5%, 17%, 17.5%, 18%, 18.5%, 19%, 19.5%, 20%, 20.5%, 21%, 21.5%, 22%, 22.5%, 23%, 23.5%, 24%, 24.5%, 25%, 25.5%, 26%, 26.5%, 27%, 27.5%, 28%, 28.5%, 29%, 29.5%, 30%, 30.5%, 31%, 31.5%, 32%, 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.

[0043] In some embodiments, by controlling the ratio of Y₂O₃ to Al₂O₃ (Y₂O₃ / Al₂O₃) within the range of 0.70 to 2.00, the hardness of the glass composition and the strengthened glass can be improved while simultaneously exhibiting high fracture toughness. Therefore, a Y₂O₃ / Al₂O₃ ratio of 0.70 to 2.00 is preferred, more preferably 0.80 to 1.80, and even more preferably 0.90 to 1.50. In some implementations, the Y₂O₃ / Al₂O₃ ratio can be 0.70, 0.73, 0.75, 0.77, 0.80, 0.83, 0.85, 0.87, 0.90, 0.93, 0.95, 0.97, 1.00, 1.03, 1.05, 1.07, 1.10, 1.13, 1.15, 1.17, 1.20, 1.23, 1.25, 1.27, 1.30, 1.33, 1 0.35, 1.37, 1.40, 1.43, 1.45, 1.47, 1.50, 1.53, 1.55, 1.57, 1.60, 1.63, 1.65, 1.67, 1.70, 1.73, 1.75, 1.77, 1.80, 1.83, 1.85, 1.87, 1.90, 1.93, 1.95, 1.97, 2.00, etc., as well as 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.

[0044] In some embodiments, controlling the ratio of ZrO2 to Y2O3 (ZrO2 / Y2O3) within the range of 0.06 to 0.60 is beneficial for improving the chemical strengthening properties of the glass composition, increasing the depth of the ion exchange layer in the strengthened glass, and giving the strengthened glass higher fracture toughness and impact resistance. Therefore, a ZrO2 / Y2O3 ratio of 0.06 to 0.60 is preferred, more preferably 0.10 to 0.58, further preferably 0.13 to 0.48, and even more preferably 0.15 to 0.38. In some implementations, the ZrO2 / Y2O3 ratio can be 0.06, 0.07, 0.08, 0.09, 0.10, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19, 0.20, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0... 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, etc., as well as 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.

[0045] Li₂O is the main component used for ion exchange in the chemical strengthening of glass compositions. An appropriate amount of Li₂O can provide sufficient compressive stress to strengthen the glass, resulting in higher flexural strength and fracture toughness. However, excessive Li₂O content reduces the Young's modulus of both the glass composition and the strengthened glass. Therefore, the Li₂O content is 1%–10%, optionally 1.5%–9%, ​​and more preferably 2%–8%. In some embodiments, the Li₂O content can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, etc., 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.

[0046] In some embodiments, by controlling the Li2O / ZrO2 ratio (Li2O / ZrO2) within the range of 0.20 to 3.00, the bulk drop ball height of the glass composition can be increased, as well as the surface stress, drop ball test height, and flexural strength of the tempered glass. Therefore, a Li2O / ZrO2 ratio of 0.20 to 3.00 is preferred, more preferably 0.40 to 2.50, further preferably 0.45 to 2.00, and even more preferably 0.50 to 1.80. In some implementations, the Li₂O / ZrO₂ content can be 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10, 1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1 The ranges are 0.60, 1.65, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, 2.00, 2.05, 2.10, 2.15, 2.20, 2.25, 2.30, 2.35, 2.40, 2.45, 2.50, 2.55, 2.60, 2.65, 2.70, 2.75, 2.80, 2.85, 2.90, 2.95, 3.00, etc., as well as 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.

[0047] In some embodiments, by controlling the ratio of the total content of Li2O, Y2O3, and Al2O3 (Li2O+Y2O3+Al2O3) to the content of SiO2 (Li2O+Y2O3+Al2O3) / SiO2 within the range of 0.80 to 2.10, the Young's modulus of the glass composition and the strengthened glass can be increased while simultaneously improving their hardness. Therefore, a ratio of (Li2O+Y2O3+Al2O3) / SiO2 of 0.80 to 2.10 is optional, more preferably (Li2O+Y2O3+Al2O3) / SiO2 of 1.00 to 2.00 is preferred, and even more preferably (Li2O+Y2O3+Al2O3) / SiO2 of 1.20 to 1.70 is preferred. In some implementations, the ratio of (Li₂O+Y₂O₃+Al₂O₃) / SiO₂ can be 0.80, 0.83, 0.85, 0.87, 0.90, 0.93, 0.95, 0.97, 1.00, 1.03, 1.05, 1.07, 1.10, 1.13, 1.15, 1.17, 1.20, 1.23, 1.25, 1.27, 1.30, 1.33, 1.35, 1.37, 1.40, 1.43, 1.45, 1.47, 1.50, 1.53, 1.55, 1.57, 1.60, 1.63, 1.65, 1.67, 1.70, 1.73, 1.75, 1.77, 1.80, 1.83, 1.85, 1.87, 1.90, 1.93, 1.95, 1.97, 2.00, 2.03, 2.05, 2.07, 2.10, etc., as well as 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.

[0048] In some embodiments, controlling the ratio (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) between the total content of Li2O, ZrO2, and Y2O3 (Li2O+ZrO2+Y2O3) and the total content of SiO2 and Al2O3 (SiO2+Al2O3) (Li2O+ZrO2+Y2O3) in the range of 0.35 to 1.00 is beneficial for the glass composition and the tempered glass to obtain excellent compressive strength. Therefore, it is preferable that (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.35 to 1.00, more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.40 to 0.90, and even more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.50 to 0.80. In some implementations, (Li₂O + ZrO₂ + Y₂O₃) / (SiO₂ + Al₂O₃) can be 0.35, 0.36, 0.37, 0.38, 0.39, 0.40, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, 0.50, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.60, 0.61, 0.62, 0.63, 0.64, or 0.65. The values ​​are 0.66, 0.67, 0.68, 0.69, 0.70, 0.71, 0.72, 0.73, 0.74, 0.75, 0.76, 0.77, 0.78, 0.79, 0.80, 0.81, 0.82, 0.83, 0.84, 0.85, 0.86, 0.87, 0.88, 0.89, 0.90, 0.91, 0.92, 0.93, 0.94, 0.95, 0.96, 0.97, 0.98, 0.99, 1.00, etc., as well as 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.

[0049] La2O3 can increase the refractive index of glass, improve its devitrification resistance and structural compactness. However, if the La2O3 content is too high, it will hinder ion exchange in the glass composition during the chemical strengthening process, leading to a decrease in the chemical strengthening performance of the glass composition and an increase in its density. Therefore, the La2O3 content is 0-8%, optionally 0-6%, and more preferably 0-5%. In some embodiments, the La2O3 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.3%, 0.5%, 0.7%, 1%, 1.3%, 1.5%, 1.7%, 2%, 2.3%, 2.5%, 2.7%, 3%, 3.3%, 3.5%, 3.7%, 4%, 4.3%, 4.5%, 4.7%, 5%, 5.3%, 5.5%, 5.7%, 6%, 6.3%, 6.5%, 6.7%, 7%, 7.3%, 7.5%, 7.7%, 8%, 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.

[0050] In some embodiments, the ratio of SiO2 content to the total content of Y2O3 and La2O3 (Y2O3+La2O3), SiO2 / (Y2O3+La2O3), is controlled within the range of 0.80 to 2.80. This can improve the light transmittance of the glass composition and the tempered glass while giving them a higher Young's modulus. Therefore, SiO2 / (Y2O3+La2O3) can be selected as 0.80 to 2.80, more preferably 1.00 to 2.20, and even more preferably 1.20 to 1.90. In some embodiments, the SiO2 / (Y2O3+La2O3) ratio is 0.80, 0.83, 0.85, 0.87, 0.90, 0.93, 0.95, 0.97, 1.00, 1.03, 1.05, 1.07, 1.10, 1.13, 1.15, 1.17, 1.20, 1.23, 1.25, 1.27, 1.30, 1.33, 1.35, 1.37, 1.40, 1.43, 1.45, 1.47, 1.50, 1.53, 1.55, 1.57, 1.60, 1.63, 1.65, 1.67, 1.70, 1.73, 1.75, 1.7 7, 1.80, 1.83, 1.85, 1.87, 1.90, 1.93, 1.95, 1.97, 2.00, 2.03, 2.05, 2.07, 2.10, 2.13, 2.15, 2.17, 2.20, 2.23, 2.25, 2.27, 2.30, 2.33, 2.35, 2.37, 2.40, 2.43, 2.45, 2.47, 2.50, 2.53, 2.55, 2.57, 2.60, 2.63, 2.65, 2.67, 2.70, 2.73, 2.75, 2.77, 2.80, etc., as well as 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.

[0051] Gd₂O₃ can improve the refractive index and chemical stability of glass, but if its content exceeds 5%, the glass's resistance to devitrification and chemical strengthening properties deteriorate. Therefore, the content of Gd₂O₃ is 0–5%, optionally 0–3%, and more preferably 0–1%. In some embodiments, it is further optional that Gd₂O₃ is not present. In some embodiments, the content of Gd₂O₃ can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.3%, 3.5%, 3.7%, 4%, 4.3%, 4.5%, 4.7%, 5%, 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.

[0052] Sodium oxychloride (Na₂O) can improve the meltability of glass, but if the Na₂O content is too high, the chemical strengthening properties of the glass composition will decrease, and it is prone to causing phase separation and devitrification during glass forming. Therefore, the Na₂O content in the glass composition is 0–3%, optionally 0–2%, and more preferably 0–1%. In some embodiments, when sodium salts are used to chemically strengthen the glass composition, a small amount of Na₂O will be present on the surface of the strengthened glass. Therefore, the Na₂O content in the strengthened glass is 0–3%, optionally greater than 0 but less than or equal to 2%, and more preferably greater than 0 but less than or equal to 1%. In some embodiments, the Na₂O content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 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.

[0053] K₂O improves the thermal stability and melting properties of glass, but if its content is too high, the chemical strengthening properties of the glass composition deteriorate, as do its resistance to devitrification and chemical stability. Therefore, the K₂O content in the glass composition of this invention is 0–2%, optionally 0–1%, and more preferably 0–0.5%. In some embodiments, when potassium salts are used to chemically strengthen the glass composition, a small amount of K₂O will be present on the surface of the strengthened glass. Therefore, the K₂O content in the strengthened glass is 0–2%, optionally greater than 0 but less than or equal to 1%, more preferably greater than 0 but less than or equal to 0.5%, and optionally 0.01%–2%. In some embodiments, the K2O content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 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.

[0054] RO (RO being one or more of MgO, CaO, SrO, BaO, and ZnO) can improve the meltability of glass, but excessive RO content can hinder ion exchange in the glass composition during chemical strengthening, leading to a decrease in the chemical strengthening properties of the glass composition and reducing the flexural strength and drop ball test height of the strengthened glass. Therefore, the RO content is 0–5%, preferably 0–3%, and even more preferably 0–2%. In some embodiments, the RO content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.3%, 3.5%, 3.7%, 4%, 4.3%, 4.5%, 4.7%, 5%, 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.

[0055] B2O3 can improve the melt flow properties and devitrification resistance of glass, but if its content is too high, it will reduce the chemical stability and hardness of the glass, and also be detrimental to the chemical strengthening properties of the glass composition. Therefore, the content of B2O3 in this invention is 0-4%, optionally 0-2%, and more preferably 0-1%. In some embodiments, the content of B2O3 can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.3%, 3.5%, 3.7%, 4%, 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.

[0056] TiO2 can improve the refractive index and glass-forming properties of glass, but excessive TiO2 content can lead to a decrease in the light transmittance of the glass composition and the tempered glass. Therefore, the TiO2 content in this invention is 0-4%, optionally 0-2%, and more preferably 0-1%. In some embodiments, the TiO2 content can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 3.3%, 3.5%, 3.7%, 4%, 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.

[0057] In this invention, by using one or more components selected from Sb₂O₃, SnO₂, and CeO₂ as a clarifying agent containing 0-2%, the clarification effect of the glass can be improved, which is beneficial for removing bubbles from the glass. The content of the clarifying agent can optionally be 0-1%, and more preferably 0-0.5%. In some embodiments, the content of the clarifying agent can be 0%, greater than 0%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, 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.

[0058] The terms "not containing", "0", and "0%" used herein mean that the compound, molecule, or element was not intentionally added as a raw material to the glass composition and tempered glass of this invention. However, as raw materials and / or equipment used to produce the glass composition and tempered glass, there may be certain impurities or components that are not intentionally added, which may be present in small or trace amounts in the final glass composition or tempered glass. Such cases are also within the scope of protection of this patent.

[0059] The properties of the glass composition and the tempered glass of the present invention will now be described.

[0060] <Refractive index>

[0061] Refractive index (n) of glass composition / strengthened glass d Test according to the method specified in the national standard GB / T 7962.1-2010.

[0062] <Density>

[0063] The density (ρ) of the glass composition / tempered glass was tested according to the method specified in the national standard GB / T7962.20-2010.

[0064] Coefficient of thermal expansion

[0065] The coefficient of thermal expansion (α) of the glass composition / strengthened glass 20 / 300℃ Data were tested at 20–300°C according to the method specified in the national standard GB / T7962.16-2010.

[0066] Young's Modulus

[0067] The Young's modulus (E) of the glass composition / tempered glass was determined by ultrasonic testing of its longitudinal wave velocity and transverse wave velocity, and then calculated according to the following formula. The test sample had dimensions of 120mm × 24mm × 6mm.

[0068]

[0069] G=V S 2 ρ

[0070] In the formula: E is Young's modulus, Pa;

[0071] G is the shear modulus, Pa;

[0072] V T The transverse wave velocity is in m / s;

[0073] V S The longitudinal wave velocity is given in m / s.

[0074] ρ is the density of glass, in g / cm³ 3 .

[0075] Vickers Hardness

[0076] The Vickers hardness test method for glass compositions / tempered glass is as follows: The test sample is 10mm × 10mm × 10mm in size. After chamfering, grinding, and polishing, the sample is prepared by pressing a diamond pyramid indenter with a 136° angle between the opposing faces into a pyramid-shaped indentation on the test surface. The load (N) is calculated by dividing the length of the indentation by the surface area (mm²) of the indentation. 2 The value is represented by ). The test load is 100 (N) and the holding time is 15 (seconds). In this invention, Vickers hardness can be simply referred to as hardness.

[0077] <Drop height test>

[0078] A tempered glass sample measuring 149mm × 73mm × 0.6mm was placed on a glass bearing fixture, and a 132g steel ball was dropped from a specified height. The maximum drop ball test height from which the sample could withstand the impact without breaking was determined. Specifically, the test was conducted starting from a drop ball test height of 800mm, and then progressively increasing the height to 800mm, 900mm, 1000mm, and above without breakage. For the embodiment with a "drop ball test height," tempered glass was used as the test object. In this embodiment, test data recorded at 1000mm indicates that the tempered glass withstood the impact without breaking even when a steel ball was dropped from a height of 1000mm. In this invention, the drop ball test height can be simply referred to as the drop ball height.

[0079] <Body Drop Test Height>

[0080] A glass composition sample measuring 149mm × 73mm × 0.6mm was placed on a glass bearing fixture, and a 32g steel ball was dropped from a specified height. The maximum drop ball test height from which the sample could withstand the impact without breaking is defined as the body drop ball test height. Specifically, the test was conducted starting from a drop ball test height of 500mm, and then progressively increasing the height to 500mm, 600mm, 700mm, and above without breakage. The body drop ball test height can be simply referred to as the body drop ball height. For embodiments with a "body drop ball height," the glass composition is used as the test object, and this is the drop ball test height of the glass composition. In the embodiment, the test data recorded as 1000mm indicates that the glass composition withstood the impact without breaking even when a steel ball was dropped from a height of 1000mm.

[0081] <Light transmittance>

[0082] The light transmittance mentioned in this article refers to external transmittance, or simply transmittance.

[0083] The sample was processed to a size of less than 1 mm and its opposite surfaces were polished in parallel. The average light transmittance of 400–800 nm was measured using a Hitachi U-41000 spectrophotometer.

[0084] The sample was processed to a size of less than 1 mm and its surfaces were polished in parallel. The light transmittance at 550 nm was measured using a Hitachi U-41000 spectrophotometer.

[0085] <Ion exchange layer depth>

[0086] The depth of the ion exchange layer in tempered glass was measured using a SLP-2000 glass surface stress meter.

[0087] The measurement conditions were calculated with the sample's refractive index being 1.53 and its optical elastic constant being 25 [(nm / cm) / MPa].

[0088] Surface stress

[0089] The surface stress of tempered glass was measured using a glass surface stress meter SLP-2000.

[0090] The measurement conditions were calculated with the sample's refractive index being 1.53 and its optical elastic constant being 25 [(nm / cm) / MPa].

[0091] <Fracture toughness>

[0092] The method of directly measuring the indentation-propagated crack size was used. The sample size was 10mm×10mm×10mm. After chamfering, grinding and polishing, the sample was prepared. A force of 49N was applied to the sample with a Vickers hardness indenter and maintained for 30s to make an indentation. The fracture toughness was determined by the three-point bending method.

[0093] Four-point bending strength

[0094] A CMT6502 microcomputer-controlled electronic universal testing machine was used. The test sample dimensions were 149mm × 73mm × 0.6mm, and the test was conducted according to ASTM C 158-2002 standard. In this invention, the four-point bending strength can be simply referred to as bending strength.

[0095] <Drop resistance>

[0096] Drop resistance testing was conducted using a WH-2101 drop tester. A 220g load was placed on a tempered glass (2D structure) substrate, with 80-grit sandpaper laid on the base. The sample was dropped freely from a specified height, directly impacting the sandpaper. The drop resistance was measured from the height from which the sample could withstand the impact without breaking. Specifically, the test started at a height of 300mm, and then increased to 400mm, 500mm, 600mm, 700mm, 800mm, 900mm, 1000mm, and above without breakage. For the embodiment demonstrating "drop resistance," tempered glass was used as the test object. Test data recorded at 800mm in this embodiment indicates that the tempered glass withstood the impact without breaking even when loaded from a height of 800mm. The maximum test height for the WH-2101 drop tester was 2000mm.

[0097] <Compressive strength>

[0098] A CMT6502 microcomputer-controlled electronic universal testing machine was used. A test sample with dimensions of φ30mm × 1mm was placed on a glass bearing fixture. The compression rod had a mushroom-head design with a diameter of 10mm, and the compression speed was 5mm / min until the sample broke. Calibration with a fixture was required before testing, and the test point was located at the center. The test button was pressed until the sample broke under pressure, and the pressure (N) at break was recorded. For the embodiment with "compressive strength," tempered glass was used as the test object. In this embodiment, the recorded test data was 500N, indicating that the tempered glass could withstand a maximum compressive force of 500N before breaking.

[0099] The glass composition of the present invention has the following properties:

[0100] 1) In some embodiments, the refractive index (n) of the glass composition of the present invention is... dThe lower limit of the refractive index (n) is 1.56, optionally 1.57, and more preferably 1.58. In some embodiments, the refractive index (n) of the glass composition of the present invention is... d The upper limit for (n) is 1.65, with an optional upper limit of 1.63, and a more optional upper limit of 1.61. In some embodiments, the refractive index (n) of the glass composition is... d The values ​​can be 1.56, 1.561, 1.563, 1.565, 1.567, 1.569, 1.57, 1.571, 1.573, 1.575, 1.577, 1.579, 1.58, 1.581, 1.583, 1.585, 1.587, 1.589, 1.59, 1.591, 1.593, 1.595, 1.597, 1.599, 1.60, 1.601, 1.603, 1.605, 1 .607, 1.609, 1.61, 1.611, 1.613, 1.615, 1.617, 1.619, 1.62, 1.621, 1.623, 1.625, 1.627, 1.629, 1.63, 1.631, 1.633, 1.635, 1.637, 1.639, 1.64, 1.641, 1.643, 1.645, 1.647, 1.65, etc., as well as all ranges and subranges between the above values.

[0101] 2) In some embodiments, the drop ball test height of the glass composition of the present invention is 1400 mm or more, optionally 1500 mm or more, and more preferably 1600 mm or more. In some embodiments, the drop ball test height of the glass composition can be 1400 mm, 1500 mm, 1600 mm, 1700 mm, 1800 mm, etc., as well as all ranges and sub-ranges between the above values.

[0102] 3) In some embodiments, the Vickers hardness of the glass composition of the present invention is 690 kgf / mm. 2 The above can be selected as 700 kgf / mm 2 The above can also be selected as 710kgf / mm 2 That's all. In some embodiments, the Vickers hardness of the glass composition can be 690 kgf / mm. 2 693 kgf / mm 2 695kgf / mm 2 697kgf / mm 2 700kgf / mm 2 703 kgf / mm 2 705kgf / mm 2 707 kgf / mm 2 710kgf / mm 2713 kgf / mm 2 715kgf / mm 2 717kgf / mm 2 720kgf / mm 2 723 kgf / mm 2 725kgf / mm 2 727kgf / mm 2 730kgf / mm 2 733kgf / mm 2 735kgf / mm 2 737kgf / mm 2 740kgf / mm 2 743 kgf / mm 2 745kgf / mm 2 747kgf / mm 2 750kgf / mm 2 753 kgf / mm 2 755kgf / mm 2 757kgf / mm 2 760kgf / mm 2 And so on, as well as all ranges and subranges between the above values.

[0103] 4) In some embodiments, the glass composition with a thickness of less than 1 mm has an average light transmittance of 88% or more at a wavelength of 400-800 nm, optionally 89% or more, and more preferably 90% or more. The thickness of the glass composition can be 0.2-1 mm, more preferably 0.3-0.9 mm, further preferably 0.5-0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm. In some embodiments, the glass composition with a thickness of less than 1 mm has an average light transmittance of 88%, 88.1%, 88.2%, 88.3%, 88.4%, 88.5%, 88.6%, 88.7%, 88.8%, 88.9%, 89%, 89.1%, 89.2%, 89.3%, 89.4%, 89.5%, 89.6%, 89.7%, 89.8%, 89.9%, 90%, 90.1%, 90.2%, 90.3%, 90.4%, 90.5%, 90.6%, 90.7%, 90.8%, 90.9%, 91%, etc., and all ranges and subranges between the above values.

[0104] 5) In some embodiments, the glass composition with a thickness of 1 mm or less has a light transmittance of 89% or more at a wavelength of 550 nm, optionally 90% or more, and more preferably 91% or more. The thickness of the glass composition can be 0.2 to 1 mm, more preferably 0.3 to 0.9 mm, further preferably 0.5 to 0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm. In some embodiments, the glass composition with a thickness of less than 1 mm has a light transmittance of 89%, 89.1%, 89.2%, 89.3%, 89.4%, 89.5%, 89.6%, 89.7%, 89.8%, 89.9%, 90%, 90.1%, 90.2%, 90.3%, 90.4%, 90.5%, 90.6%, 90.7%, 90.8%, 90.9%, 91%, 91.1%, 91.2%, 91.3%, 91.4%, 91.5%, 91.6%, 91.7%, 91.8%, 91.9%, 92%, etc., as well as all ranges and subranges between the above values.

[0105] 6) In some embodiments, the Young's modulus (E) of the glass composition of the present invention is 95 GPa or more, optionally 98 Ga or more, and more preferably 100 GPa or more. In some embodiments, the Young's modulus (E) of the glass composition can be 95 GPa, 95.3 GPa, 95.5 GPa, 95.7 GPa, 96 GPa, 96.3 GPa, 96.5 GPa, 96.7 GPa, 97 GPa, 97.3 GPa, 97.5 GPa, 97.7 GPa, 98 GPa, 98.3 GPa, 98.5 GPa, 98.7 GPa, 99 GPa, 99.3 GPa, 99.5 GPa, 99.7 GPa, 100 GPa, 100.3 GPa, 100.5 GPa, 100.7 GPa, 101 GPa, 101.3 GPa, 101.5 GPa, 101.7 GPa, 102 GPa, 102.3 GPa, 102.5 GPa, 102.7 GPa, 103 GPa, 103 GPa. .5GPa, 104GPa, 104.5GPa, 105GPa, 105.5GPa, 106GPa, 106.5GPa, 107GPa, 107.5GPa, 10 8GPa, 108.5GPa, 109GPa, 109.5GPa, 110GPa, 110.5GPa, 111GPa, 111.5GPa, 112GPa, 112 0.5GPa, 113GPa, 113.5GPa, 114GPa, 114.5GPa, 115GPa, 115.5GPa, 116GPa, 116.5GPa, 117GPa, 117.5GPa, 118GPa, 118.5GPa, 119GPa, 119.5GPa, 120GPa, etc., as well as all ranges and subranges between the above values.

[0106] 7) In some embodiments, the coefficient of thermal expansion (α) of the glass composition of the present invention is... 20 / 300℃ ) is 45×10 -7 / K~70×10 -7 / K, optional 50×10 -7 / K~65×10 -7 / K, or 53×10 -7 / K~63×10 -7 / K. In some embodiments, the coefficient of thermal expansion of the glass composition (α) 20 / 300℃ ) can be 45×10 -7 / K、46×10 -7 / K、47×10 -7 / K、48×10 -7 / K、49×10 -7 / K、50×10 -7 / K、51×10 -7 / K、52×10 -7 / K、53×10 -7 / K、54×10 -7 / K、55×10 -7 / K、56×10 -7 / K、57×10 -7 / K、58×10 -7 / K、59×10 -7 / K、60×10 -7 / K、61×10 -7 / K、62×10 -7 / K、63×10 -7 / K、64×10 -7 / K、65×10 -7 / K、66×10 -7 / K、67×10 -7 / K、68×10 -7 / K、69×10 -7 / K、70×10 -7 / K, etc., and all ranges and subranges between the above values.

[0107] 8) In some embodiments, the density (ρ) of the glass composition of the present invention is 3.60 g / cm³. 3 The following can be selected as 3.50g / cm 3 The following is an alternative option: 3.40 g / cm³ 3 The following can be further selected as 2.80~3.30g / cm³. 3 In some embodiments, the density (ρ) of the glass composition may be 3.60 g / cm³. 3 3.59g / cm 3 3.58g / cm 3 3.57g / cm 3 3.56g / cm 3 3.55g / cm 3 3.54g / cm 3 3.53g / cm 3 3.52g / cm 3 3.51g / cm 3 3.50g / cm 3 3.49 g / cm 3 3.48 g / cm 3 3.47 g / cm 3 3.46 g / cm 3 3.45g / cm 3 3.44 g / cm 33.43 g / cm 3 3.42 g / cm 3 3.41 g / cm 3 3.40 g / cm 3 3.39 g / cm 3 3.38g / cm 3 3.37 g / cm 3 3.36 g / cm 3 3.35g / cm 3 3.34 g / cm 3 3.33 g / cm 3 3.32g / cm 3 3.31 g / cm 3 3.30g / cm 3 3.29 g / cm 3 3.28g / cm 3 3.27 g / cm 3 3.26 g / cm 3 3.25g / cm 3 3.23 g / cm 3 3.20g / cm 3 3.17g / cm 3 3.15g / cm 3 3.13 g / cm 3 3.10 g / cm 3 3.07 g / cm 3 3.05g / cm 3 3.03 g / cm 3 3.00g / cm 3 2.97g / cm 3 2.95g / cm 3 2.93g / cm 3 2.90g / cm 3 2.87 g / cm 3 2.85g / cm 3 2.83 g / cm 3 2.80g / cm 3 And so on, as well as all ranges and subranges between the above values.

[0108] The tempered glass of this invention has the following properties:

[0109] 1) In some embodiments, the surface stress of the tempered glass of the present invention is 400 MPa or more, optionally 450 MPa or more, more preferably 480 MPa or more, and even more preferably 500 MPa or more. In some embodiments, the surface stress of the tempered glass is 400 MPa, 405 MPa, 410 MPa, 415 MPa, 420 MPa, 425 MPa, 430 MPa, 435 MPa, 440 MPa, 445 MPa, 450 MPa, 455 MPa, 460 MPa, 465 MPa, 470 MPa, 475 MPa, 480 MPa, 485 MPa, 490 MPa, 495 MPa, 500 MPa, 505 MPa, 510 MPa, 515 MPa, 520 MPa, 525 MPa, 530 MPa, etc., as well as all ranges and sub-ranges between the above values.

[0110] 2) In some embodiments, the ion exchange layer depth of the tempered glass of the present invention is 80 μm or more, optionally 90 μm or more, more preferably 95 μm or more, and even more preferably 100 μm or more. In some embodiments, the ion exchange layer depth of the tempered glass is 80 μm, 81 μm, 82 μm, 83 μm, 84 μm, 85 μm, 86 μm, 87 μm, 88 μm, 89 μm, 90 μm, 91 μm, 92 μm, 93 μm, 94 μm, 95 μm, 96 μm, 97 μm, 98 μm, 99 μm, 100 μm, or 101 μm. 102μm, 103μm, 104μm, 105μm, 106μm, 107μm, 108μm, 109μm, 110μm, 111μm, 112μm, 113μm, 114μm, 115μm, 116μm, 117μm, 118μm, 119μm, 120μm, etc., as well as all ranges and subranges between the above values.

[0111] 3) In some embodiments, the drop ball test height of the tempered glass of the present invention is 1500 mm or more, optionally 1600 mm or more, and more preferably 1700 mm or more. In some embodiments, the drop ball test height of the tempered glass can be 1500 mm, 1600 mm, 1700 mm, 1800 mm, etc., as well as all ranges and sub-ranges between the above values.

[0112] 4) In some embodiments, the fracture toughness of the reinforced glass of the present invention is 0.7 MPa·m. 1 / 2 The above can be selected as 0.8 MPa·m 1 / 2 The above can also be selected as 0.9 MPa·m 1 / 2 That's all. In some embodiments, the fracture toughness of the reinforced glass is 0.7 MPa·m. 1 / 2 0.71 MPa·m1 / 2 0.72 MPa·m 1 / 2 0.73 MPa·m 1 / 2 0.74 MPa·m 1 / 2 0.75 MPa·m 1 / 2 0.76 MPa·m 1 / 2 0.77 MPa·m 1 / 2 0.78 MPa·m 1 / 2 0.79 MPa·m 1 / 2 0.8MPa·m 1 / 2 0.81 MPa·m 1 / 2 0.82MPa·m 1 / 2 0.83 MPa·m 1 / 2 0.84 MPa·m 1 / 2 0.85MPa·m 1 / 2 0.86 MPa·m 1 / 2 0.87 MPa·m 1 / 2 0.88 MPa·m 1 / 2 0.89 MPa·m 1 / 2 0.9 MPa·m 1 / 2 0.91 MPa·m 1 / 2 0.92MPa·m 1 / 2 0.93 MPa·m 1 / 2 0.94 MPa·m 1 / 2 0.95MPa·m 1 / 2 0.96 MPa·m 1 / 2 0.97 MPa·m 1 / 2 0.98 MPa·m 1 / 2 0.99MPa·m 1 / 2 1.0 MPa·m 1 / 2 1.01 MPa·m 1 / 2 1.02 MPa·m 1 / 2 1.03 MPa·m 1 / 2 1.04 MPa·m 1 / 2 1.05 MPa·m 1 / 2 1.06 MPa·m 1 / 2 1.07 MPa·m 1 / 2 1.08 MPa·m 1 / 2 1.09 MPa·m 1 / 2 1.1 MPa·m 1 / 2 And so on, as well as all ranges and subranges between the above values.

[0113] 5) In some embodiments, the four-point bending strength of the tempered glass of the present invention is 750 MPa or higher, optionally 780 MPa or higher, and more preferably 820 MPa or higher. In some embodiments, the four-point bending strength of the tempered glass is 750 MPa, 755 MPa, 760 MPa, 765 MPa, 770 MPa, 775 MPa, 780 MPa, 785 MPa, 790 MPa, 795 MPa, 800 MPa, 805 MPa, 810 MPa, 815 MPa, 820 MPa, 825 MPa, 830 MPa, 835 MPa, 840 MPa, 845 MPa, 850 MPa, 855 MPa, 860 MPa, 865 MPa, 870 MPa, 875 MPa, 880 MPa, etc., as well as all ranges and sub-ranges between the above values.

[0114] 6) In some embodiments, the Vickers hardness of the tempered glass of the present invention is 720 kgf / mm². 2 The above can be selected as 730 kgf / mm 2 The above can also be selected as 740kgf / mm 2 That's all. In some embodiments, the Vickers hardness of the tempered glass can be 720 kgf / mm². 2 723 kgf / mm 2 725kgf / mm 2 727kgf / mm 2 730kgf / mm 2 733kgf / mm 2 735kgf / mm 2 737kgf / mm 2 740kgf / mm 2 743 kgf / mm 2 745kgf / mm 2 747kgf / mm 2 750kgf / mm 2 753 kgf / mm 2 755kgf / mm 2 757kgf / mm 2 760kgf / mm 2 763 kgf / mm 2 765kgf / mm 2 767kgf / mm 2 770kgf / mm 2 773 kgf / mm 2 775kgf / mm 2 777kgf / mm 2780kgf / mm 2 783 kgf / mm 2 785kgf / mm 2 787kgf / mm 2 790kgf / mm 2 793 kgf / mm 2 795kgf / mm 2 797kgf / mm 2 800kgf / mm 2 And so on, as well as all ranges and subranges between the above values.

[0115] 7) In some embodiments, the tempered glass with a thickness of less than 1 mm has an average light transmittance of 88% or more at a wavelength of 400-800 nm, optionally 89% or more, and more preferably 90% or more. The thickness can be 0.2-1 mm, more preferably 0.3-0.9 mm, further preferably 0.5-0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm. In some embodiments, the average light transmittance of tempered glass with a thickness of less than 1 mm at wavelengths of 400–800 nm is 88%, 88.1%, 88.2%, 88.3%, 88.4%, 88.5%, 88.6%, 88.7%, 88.8%, 88.9%, 89%, 89.1%, 89.2%, 89.3%, 89.4%, 89.5%, 89.6%, 89.7%, 89.8%, 89.9%, 90%, 90.1%, 90.2%, 90.3%, 90.4%, 90.5%, 90.6%, 90.7%, 90.8%, 90.9%, 91%, etc., as well as all ranges and subranges between the above values.

[0116] 8) In some embodiments, the tempered glass with a thickness of less than 1 mm has a light transmittance of 89% or more at a wavelength of 550 nm, optionally 90% or more, and more preferably 91% or more. The thickness can be 0.2–1 mm, more preferably 0.3–0.9 mm, further preferably 0.5–0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm. In some embodiments, the transmittance of tempered glass with a thickness of less than 1 mm at a wavelength of 500 nm is 89%, 89.1%, 89.2%, 89.3%, 89.4%, 89.5%, 89.6%, 89.7%, 89.8%, 89.9%, 90%, 90.1%, 90.2%, 90.3%, 90.4%, 90.5%, 90.6%, 90.7%, 90.8%, 90.9%, 91%, 91.1%, 91.2%, 91.3%, 91.4%, 91.5%, 91.6%, 91.7%, 91.8%, 91.9%, 92%, etc., as well as all ranges and subranges between the above values.

[0117] 9) In some embodiments, the impact resistance of the tempered glass of the present invention is 700mm or more, optionally 800mm or more, and more preferably 900mm or more. In some embodiments, the impact resistance of the tempered glass is 700mm, 800mm, 900mm, 1000mm, 1100mm, etc., as well as all ranges and sub-ranges between the above values.

[0118] 10) In some embodiments, the compressive strength of the tempered glass of the present invention is 1200N or more, optionally 1300N or more, and more preferably 1400N or more. In some embodiments, the compressive strength of the tempered glass is 1200N, 1210N, 1220N, 1230N, 1240N, 1250N, 1260N, 1270N, 1280N, 1290N, 1300N, 1310N, 1320N, 1330N, 1340N, 1350N, 1360N, 1370N, 1380N, 1390N, 1400N, 1410N, 1420N, 1430N, 1440N, 1450N, 1460N, 1470N, 1480N, 1490N, 1500N, 1510N, 1520N, 1530N, 1540N, 1550N, etc., as well as all ranges and subranges between the above values.

[0119] [Glass composition and method for manufacturing tempered glass]

[0120] The manufacturing method of the glass composition of the present invention is as follows: The glass of the present invention is produced using conventional raw materials and processes, including but not limited to using oxides, hydroxides, complex salts (such as carbonates, nitrates, sulfates, etc.), boric acid, etc. as raw materials. After the raw materials are prepared according to conventional methods, the prepared furnace charge is put into a melting furnace (such as a platinum or platinum alloy crucible) at 1300-1600°C for melting. After clarification and homogenization, a homogeneous molten glass without bubbles and undissolved substances is obtained. This molten glass is then cast in a mold and annealed. Those skilled in the art can appropriately select raw materials, process methods, and process parameters according to actual needs.

[0121] The glass compositions of the present invention can also be formed by well-known methods. In some embodiments, the glass compositions described herein can be manufactured into glass preforms by various processes, including but not limited to sheets, lenses, prisms, etc. These processes include, but are not limited to, slot drawing, float glass, roll forming, and other processes known in the art for forming sheets, lenses, and prisms. Alternatively, the glass compositions can be formed by float glass or roll forming methods known in the art. The glass compositions and glass preforms of the present invention can have any reasonably useful thickness, shape, or structure, such as 2D, 2.5D, or 3D.

[0122] The glass composition of the present invention can be used to manufacture sheet glass preforms by methods such as grinding or polishing, but the method of manufacturing glass preforms is not limited to these methods.

[0123] Glass preforms can be manufactured from the prepared glass composition using methods such as grinding, hot pressing, or precision stamping. Specifically, glass preforms can be manufactured by machining the glass composition, such as grinding and polishing; or by using a preform made from the glass composition for molding, then hot pressing and grinding the preform; or by precision stamping a preform made through grinding. It should be noted that the methods for preparing glass preforms are not limited to the methods described above.

[0124] Manufacturing method of tempered glass:

[0125] The tempered glass of this invention is obtained by chemically strengthening the glass composition or the glass preform of this invention. The manufacturing method of the tempered glass of this invention includes the following steps: 1) forming a glass composition; 2) chemically strengthening the glass composition, or processing the glass composition into a glass preform and then chemically strengthening it. The chemical strengthening process of this invention includes immersing the glass composition or the glass preform in molten sodium and / or potassium salts at a certain temperature (i.e., the chemical strengthening temperature) for a certain period of time. The sodium salt can be NaNO3, Na2SO4, NaCl, Na2CO3, etc., and the potassium salt can be KNO3, K2SO4, KCl, K2CO3, etc.

[0126] The glass composition or glass preform of the present invention can be used to manufacture tempered glass using a one-step chemical strengthening method (i.e., a one-step chemical strengthening treatment) or a multi-step chemical strengthening method (i.e., a multi-step chemical strengthening treatment). The one-step chemical strengthening method refers to immersing the glass composition or glass preform in molten sodium and / or potassium salts once; the multi-step chemical strengthening method refers to immersing the glass composition or glass preform in molten sodium and / or potassium salts two or more times, specifically, it can be a two-step chemical strengthening treatment, a three-step chemical strengthening treatment, a four-step chemical strengthening treatment, a five-step chemical strengthening treatment, etc.

[0127] The chemical strengthening treatment of the glass composition or glass preform of the present invention may employ a multi-step chemical strengthening method, more preferably a two-step chemical strengthening method, and further preferably, the glass composition or glass preform may be immersed in molten salt containing sodium salt and / or potassium salt for a two-step chemical strengthening treatment. The sodium salt may be NaNO3, and the potassium salt may be KNO3.

[0128] The first step of chemical strengthening involves Li-Na exchange, in which the glass composition or glass preform is immersed in a molten salt containing sodium salt. This molten salt can be pure NaNO3 molten salt or a mixed molten salt composed of NaNO3 and KNO3, or other known common salt bath components and salt bath additives. This first step of chemical strengthening allows for high-stress-depth ion exchange in the glass composition, increasing its resistance to fracture, puncture, and crack propagation. For chemical strengthening, higher temperatures result in faster ion diffusion and a deeper stress layer. However, excessively high chemical strengthening temperatures can lead to stress relaxation and surface damage from salt bath corrosion, affecting subsequent application performance. Conversely, low chemical strengthening temperatures result in slow ion diffusion, a shallow stress layer, and insignificant strengthening effects. Therefore, the first step of chemical strengthening in this invention can be selected at 400–550°C, more preferably 420–520°C, and even more preferably 430–500°C. In some embodiments, the first-step chemical strengthening temperature can be 400℃, 405℃, 410℃, 415℃, 420℃, 425℃, 430℃, 435℃, 440℃, 445℃, 450℃, 455℃, 460℃, 465℃, 470℃, 475℃, 480℃, 485℃, 490℃, 495℃, 500℃, 505℃, 510℃, 515℃, 520℃, 525℃, 530℃, 535℃, 540℃, 545℃, 550℃, etc., as well as all ranges and sub-ranges between these values. Appropriately increasing the chemical strengthening time can increase the stress layer depth and improve the strengthening effect; however, excessively long chemical strengthening times can easily lead to salt bath volatilization and decomposition, causing impurities to adhere to the surface of the glass composition, and significantly reducing the salt bath life. Therefore, the first step of chemical strengthening time in this invention can be selected as 1 to 11 hours, more preferably 1 to 9 hours, and even more preferably 1 to 7 hours. In some embodiments, the first step of chemical strengthening time can be 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, 5.5 hours, 6 hours, 6.5 hours, 7 hours, 7.5 hours, 8 hours, 8.5 hours, 9 hours, 9.5 hours, 10 hours, 10.5 hours, 11 hours, etc., as well as all ranges and sub-ranges between the above values.

[0129] The second step of chemical strengthening involves Na-K exchange. The glass composition or preform, after the first step of chemical strengthening, is immersed in a molten salt containing potassium salts. This molten salt can be pure KNO3 molten salt or a mixed molten salt composed of KNO3 and NaNO3, or other known common salt bath components and salt bath additives. Between the first and second steps of chemical strengthening, the glass composition or preform can be cleaned and annealed. This second step of chemical strengthening allows for ion exchange with high surface stress in the glass composition, increasing the glass's drop resistance and impact resistance. For Na-K chemical strengthening, lower temperatures result in slower ion diffusion in the glass, a lower stress layer, higher surface ion concentration, and easier achievement of high surface compressive stress. However, excessively low strengthening temperatures reduce the ion exchange coefficient of the glass, making it impossible to achieve a usable chemically strengthened stress layer. Excessively high strengthening temperatures lead to stress relaxation, reduced surface compressive stress, and easy volatilization and decomposition of the salt bath, causing impurities to adhere to the glass composition surface and significantly reducing the salt bath life. Therefore, the second-step chemical strengthening temperature in this invention can be selected as 420–520°C, more preferably 430–500°C, and even more preferably 440–490°C. In some embodiments, the second-step chemical strengthening temperature can be 420°C, 425°C, 430°C, 435°C, 440°C, 445°C, 450°C, 455°C, 460°C, 465°C, 470°C, 475°C, 480°C, 485°C, 490°C, 495°C, 500°C, 505°C, 510°C, 515°C, 520°C, etc., as well as all ranges and sub-ranges between the above values. The shorter the chemical strengthening time, the shallower the stress layer depth and the greater the surface compressive stress. However, if the chemical strengthening time is too short, the strengthening effect will be insignificant, and an effective stress layer will not be obtained. If the chemical strengthening time is too long, it is easy to cause stress relaxation, as well as surface damage and surface deposits due to severe salt bath volatilization and decomposition. Therefore, the glass described in this invention is expected to have a lower strengthening time to obtain a larger surface compressive stress and prevent salt bath deterioration. The second chemical strengthening time of this invention can be selected from 10 minutes to 2.5 hours, more preferably from 20 minutes to 2 hours. In some embodiments, the second chemical strengthening time can be 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 35 minutes, 40 minutes, 45 minutes, 50 minutes, 55 minutes, 1 hour, 1 hour 10 minutes, 1 hour 20 minutes, 1.5 hours, 1 hour 40 minutes, 1 hour 50 minutes, 2 hours, 2 hours 10 minutes, 2 hours 20 minutes, 2.5 hours, etc., as well as all ranges and subranges between the above values.

[0130] [Glass prefabrication and glass components]

[0131] Glass preforms can be manufactured from the prepared glass composition using methods such as direct drop forming, grinding, or hot pressing. That is, glass preforms can be manufactured by directly and precisely drop forming the molten glass composition, by machining such as grinding and polishing, or by hot pressing a preform made from the glass composition for compression molding, followed by grinding. It should be noted that the methods for preparing glass preforms are not limited to the methods described above.

[0132] As described above, the glass composition and tempered glass of the present invention are useful for various glass components and optical designs, wherein a preform is particularly selected from the glass composition of the present invention for re-hot pressing, precision stamping, etc., to manufacture glass components such as lenses and prisms, or the tempered glass of the present invention is manufactured into glass components.

[0133] Both the glass preform and the glass element of the present invention are formed from the glass composition or strengthened glass described above. The glass preform of the present invention possesses the excellent properties of the glass composition; the glass element of the present invention possesses the excellent properties of the glass composition or chemical strengthening properties, and can provide various lenses, prisms, diffraction gratings and other glass elements with high optical value.

[0134] Examples of lenses include concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, plano-concave lenses, and so on, where the lens surface is spherical or aspherical.

[0135] [Glass cover]

[0136] The glass composition and tempered glass of the present invention, due to their superior properties, can be used to manufacture glass covers for use in electronic devices or display devices to protect electronic components within them.

[0137] [equipment]

[0138] The glass composition, tempered glass, glass cover, glass preform, and glass element of this invention, due to their superior properties, can be used to manufacture various types of equipment, such as electronic devices and display devices. These devices include portable electronic devices (such as mobile phones, watches, tablet PCs, translators, etc.), computers, televisions, MTA machines, industrial displays, photographic equipment, video recording equipment, projection equipment, monitoring equipment, and vehicle-mounted equipment, etc., containing the glass composition of this invention and / or tempered glass and / or glass cover, and / or glass preform, and / or glass element. Furthermore, the devices described in this invention also include touchscreens, protective windows, car windows, train windows, aircraft mechanical windows, solar cells, home appliances, kitchen appliances, semiconductor wafers, etc., containing the glass composition of this invention and / or tempered glass and / or glass cover, and / or glass preform, and / or glass element.

[0139] [Example]

[0140] <Examples of Glass Compositions>

[0141] To further illustrate and explain the technical solution of the present invention, the following non-limiting embodiments are provided.

[0142] In this embodiment, a glass composition having the composition shown in Tables 1 to 4 was obtained using the manufacturing method of the glass composition described above. Furthermore, the properties of each glass were measured using the testing method described in this invention, and the measurement results are shown in Tables 1 to 4. In this embodiment, the average light transmittance at wavelengths of 400–800 nm and the light transmittance at a wavelength of 550 nm are based on test results of a glass composition with a thickness of 0.6 mm.

[0143] Table 1.

[0144]

[0145] Table 2.

[0146]

[0147] Table 3.

[0148]

[0149] Table 4.

[0150]

[0151] <Example of Tempered Glass>

[0152] In this embodiment, the glass compositions shown in Tables 1 to 4 are used to manufacture reinforced glass using the above-described method, resulting in reinforced glass as shown in Tables 5 to 8. The characteristics of each reinforced glass are measured using the testing method described in this invention, and the results are presented in Tables 5 to 8. In this embodiment, the average light transmittance at wavelengths of 400–800 nm and the light transmittance at wavelength of 550 nm are based on the test results of reinforced glass with a thickness of 0.6 mm.

[0153] Table 5.

[0154]

[0155] Table 6.

[0156]

[0157] Table 7.

[0158]

[0159] Table 8.

[0160]

Claims

1. Tempered glass, characterized in that, Its composition, expressed as a weight percentage, contains: SiO2: 30%–50%; Al2O3: 13%–27%; ZrO2: 1%–12%; Y2O3: 15%–32%; Li2O: 1%–10%, of which the Y2O3 / Al2O3 ratio is 0.70–2.

00.

2. The tempered glass according to claim 1, characterized in that, Its components, expressed as a weight percentage, also contain: La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

3. Tempered glass, characterized in that, Its composition includes SiO2, Al2O3, ZrO2, Y2O3, and Li2O, expressed as a weight percentage, with the Y2O3 / Al2O3 ratio ranging from 0.70 to 2.

00. The Vickers hardness of the strengthened glass is 720 kgf / mm. 2 above.

4. The tempered glass according to claim 3, characterized in that, Its components, expressed as a weight percentage, contain: SiO2: 30%–50%; and / or Al2O3: 13%–27%; and / or ZrO2: 1%–12%; and / or Y2O3: 15%–32%; and / or Li2O: 1%–10%; and / or La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

5. The tempered glass according to any one of claims 1 to 4, characterized in that, Its components are expressed as weight percentages, wherein: Y2O3 / Al2O3 is 0.80 to 1.80, optionally Y2O3 / Al2O3 is 0.90 to 1.50; and / or ZrO2 / Y2O3 is 0.06 to 0.60, optionally ZrO2 / Y2O3 is 0.10 to 0.58, more preferably ZrO2 / Y2O3 is 0.13 to 0.48, further preferably ZrO2 / Y2O3 is 0.15 to 0.38; and / or SiO2 / (Y2O3+La2O3) is 0.80 to 2.80, optionally SiO2 / (Y2O3+La2O3) is 1.00 to 2.20, more preferably SiO2 / (Y2O3+La2O3) is 1.20 to 1.

90.

6. The tempered glass according to any one of claims 1 to 4, characterized in that, Its components are expressed as weight percentages, wherein: Li₂O / ZrO₂ is 0.20–3.00, optionally 0.40–2.50, more preferably 0.45–2.00, and even more preferably 0.50–1.80; and / or (Li₂O+Y₂O₃+Al₂O₃) / SiO₂ is 0.80–2.10, optionally (Li₂O+Y₂O₃+Al₂O₃) / SiO₂ is 1.

00. ~2.00, or more preferably (Li2O+Y2O3+Al2O3) / SiO2 is 1.20~1.70; and / or (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.35~1.00, or more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.40~0.90, or more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.50~0.

80.

7. The tempered glass according to any one of claims 1 to 4, characterized in that, Its components are expressed as weight percentages, including: SiO2: 32%–47%, optionally SiO2: 36%–44%; and / or Al2O3: 16%–25%, optionally Al2O3: 18%–24%; and / or ZrO2: 2%–10%, optionally ZrO2: 3%–8%; and / or Y2O3: 18%–30%, optionally Y2O3: 20%–27%; and / or Li2O: 1.5%–9%, ​​optionally Li2O: 2%–8%; and / or La2O3: 0%–6%, optionally La2O3: 0%–5%; and / or Gd2O3: 0%–3%, optionally Gd2O3: 0%–1%, or preferably without Gd2O3; and / or Na. 2O: greater than 0 but less than or equal to 2%, optional Na2O: greater than 0 but less than or equal to 1%; and / or K2O: greater than 0 but less than or equal to 1%, optional K2O: greater than 0 but less than or equal to 0.5%; and / or RO: 0 to 3%, optional RO: 0 to 2%; and / or B2O3: 0 to 2%, optional B2O3: 0 to 1%, more preferably without B2O3; and / or TiO2: 0 to 2%, optional TiO2: 0 to 1%; and / or clarifying agent: 0 to 1%, optional clarifying agent: 0 to 0.5%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

8. The tempered glass according to any one of claims 1 to 4, characterized in that, The surface stress of the strengthened glass is 400 MPa or higher, optionally 450 MPa or higher, more preferably 480 MPa or higher, and even more preferably 500 MPa or higher; and / or the ion exchange layer depth is 80 μm or higher, optionally 90 μm or higher, more preferably 95 μm or higher, and even more preferably 100 μm or higher; and / or the drop ball test height is 1500 mm or higher, optionally 1600 mm or higher, and even more preferably 1700 mm or higher; and / or the fracture toughness is 0.7 MPa·m. 1 / 2 The above can be selected as 0.8 MPa·m 1 / 2 The above can also be selected as 0.9 MPa·m 1 / 2 The above; and / or a four-point bending strength of 750 MPa or higher, optionally 780 MPa or higher, and even more preferably 820 MPa or higher; and / or a Vickers hardness of 720 kgf / mm². 2 The above can be selected as 730 kgf / mm 2 The above can also be selected as 740kgf / mm 2 The above; and / or drop resistance of 700mm or more, with 800mm or more optional, and 900mm or more optional; and / or compressive strength of 1200N or more, with 1300N or more optional, and 1400N or more optional.

9. The tempered glass according to any one of claims 1 to 4, characterized in that, For tempered glass with a thickness of less than 1 mm, the average light transmittance at wavelengths of 400–800 nm is 88% or higher, with an option of 89% or higher, and even more specifically, 90% or higher; and / or for tempered glass with a thickness of less than 1 mm, the light transmittance at wavelengths of 550 nm is 89% or higher, with an option of 90% or higher, and even more specifically, 91% or higher.

10. The tempered glass according to claim 9, characterized in that, The thickness of the tempered glass is 0.2-1mm, optionally 0.3-0.9mm, more preferably 0.5-0.8mm, and even more preferably 0.55mm, 0.6mm, 0.68mm, 0.7mm, or 0.75mm.

11. A glass composition, characterized in that, Its composition, expressed as a weight percentage, contains: SiO2: 30%–50%; Al2O3: 13%–27%; ZrO2: 1%–12%; Y2O3: 15%–32%; Li2O: 1%–10%, of which the Y2O3 / Al2O3 ratio is 0.70–2.

00.

12. The glass composition according to claim 11, characterized in that, Its components, expressed as a weight percentage, also contain: La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

13. A glass composition, characterized in that, Its composition contains SiO2, Al2O3, ZrO2, Y2O3, and Li2O, expressed as a weight percentage, wherein the Y2O3 / Al2O3 ratio is 0.70–2.00, and the Vickers hardness of the glass composition is 690 kgf / mm. 2 above.

14. The glass composition according to claim 13, characterized in that, Its components, expressed as a weight percentage, contain: SiO2: 30%–50%; and / or Al2O3: 13%–27%; and / or ZrO2: 1%–12%; and / or Y2O3: 15%–32%; and / or Li2O: 1%–10%; and / or La2O3: 0–8%; and / or Gd2O3: 0–5%; and / or Na2O: 0–3%; and / or K2O: 0–2%; and / or RO: 0–5%; and / or B2O3: 0–4%; and / or TiO2: 0–4%; and / or clarifying agent: 0–2%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

15. The glass composition according to any one of claims 11 to 14, characterized in that, Its components are expressed as weight percentages, wherein: Y2O3 / Al2O3 is 0.80 to 1.80, optionally Y2O3 / Al2O3 is 0.90 to 1.50; and / or ZrO2 / Y2O3 is 0.06 to 0.60, optionally ZrO2 / Y2O3 is 0.10 to 0.58, more preferably ZrO2 / Y2O3 is 0.13 to 0.48, further preferably ZrO2 / Y2O3 is 0.15 to 0.38; and / or SiO2 / (Y2O3+La2O3) is 0.80 to 2.80, optionally SiO2 / (Y2O3+La2O3) is 1.00 to 2.20, more preferably SiO2 / (Y2O3+La2O3) is 1.20 to 1.

90.

16. The glass composition according to any one of claims 11 to 14, characterized in that, Its components are expressed as weight percentages, wherein: Li₂O / ZrO₂ is 0.20–3.00, optionally 0.40–2.50, more preferably 0.45–2.00, and even more preferably 0.50–1.80; and / or (Li₂O+Y₂O₃+Al₂O₃) / SiO₂ is 0.80–2.10, optionally (Li₂O+Y₂O₃+Al₂O₃) / SiO₂ is 1.

00. ~2.00, or more preferably (Li2O+Y2O3+Al2O3) / SiO2 is 1.20~1.70; and / or (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.35~1.00, or more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.40~0.90, or more preferably (Li2O+ZrO2+Y2O3) / (SiO2+Al2O3) is 0.50~0.

80.

17. The glass composition according to any one of claims 11 to 14, characterized in that, Its components are expressed as weight percentages, including: SiO2: 32%–47%, optionally SiO2: 36%–44%; and / or Al2O3: 16%–25%, optionally Al2O3: 18%–24%; and / or ZrO2: 2%–10%, optionally ZrO2: 3%–8%; and / or Y2O3: 18%–30%, optionally Y2O3: 20%–27%; and / or Li2O: 1.5%–9%, ​​optionally Li2O: 2%–8%; and / or La2O3: 0%–6%, optionally La2O3: 0%–5%; and / or Gd2O3: 0%–3%, optionally Gd2O3: 0%–1%, and optionally none. The formula contains Gd₂O₃; and / or Na₂O: 0–2%, optionally Na₂O: 0–1%; and / or K₂O: 0–1%, optionally K₂O: 0–0.5%; and / or RO: 0–3%, optionally RO: 0–2%; and / or B₂O₃: 0–2%, optionally B₂O₃: 0–1%, or more preferably without B₂O₃; and / or TiO₂: 0–2%, optionally TiO₂: 0–1%; and / or clarifying agent: 0–1%, optionally clarifying agent: 0–0.5%, wherein the RO is one or more of MgO, CaO, SrO, BaO, and ZnO, and the clarifying agent is one or more of Sb₂O₃, SnO₂, and CeO₂.

18. The glass composition according to any one of claims 11 to 14, characterized in that, The glass composition has a refractive index of 1.56–1.65, optionally 1.57–1.63, and more preferably 1.58–1.61; and / or a drop ball test height of 1400 mm or more, optionally 1500 mm or more, and more preferably 1600 mm or more; and / or a Vickers hardness of 690 kgf / mm. 2 The above can be selected as 700 kgf / mm 2 The above can also be selected as 710kgf / mm 2 The above; and / or a Young's modulus of 95 GPa or higher, optionally 98 Ga or higher, and even more preferably 100 GPa or higher; and / or a coefficient of thermal expansion of 45 × 10⁻⁶. -7 / K~70×10 -7 / K, optional 50×10 -7 / K~65×10 -7 / K, or 53×10 -7 / K~63×10 -7 / K; and / or a density of 3.60 g / cm³ 3 The following can be selected as 3.50g / cm 3 The following is an alternative option: 3.40 g / cm³ 3 The following can be further selected as 2.80~3.30g / cm³. 3 .

19. The glass composition according to any one of claims 11 to 14, characterized in that, For glass compositions with a thickness of less than 1 mm, the average light transmittance at a wavelength of 400–800 nm is 88% or more, optionally 89% or more, and even more preferably 90% or more; and / or for glass compositions with a thickness of less than 1 mm, the light transmittance at a wavelength of 550 nm is 89% or more, optionally 90% or more, and even more preferably 91% or more.

20. The glass composition according to claim 19, characterized in that, The thickness of the glass composition is 0.2-1 mm, optionally 0.3-0.9 mm, more preferably 0.5-0.8 mm, and even more preferably 0.55 mm, 0.6 mm, 0.68 mm, 0.7 mm, or 0.75 mm.

21. A glass precast component, characterized in that, It is made using the glass composition according to any one of claims 11 to 20.

22. Tempered glass, characterized in that, It is made using the glass composition according to any one of claims 11 to 20, or using the glass preform according to claim 21.

23. A glass element, characterized in that, It is made of any of the tempered glass described in claims 1 to 10 and 22, or of any of the glass compositions described in claims 11 to 20, or of the glass preform described in claim 21.

24. A glass cover plate, characterized in that, It is made of any of the tempered glass described in claims 1 to 10 and 22, or of any of the glass compositions described in claims 11 to 20.

25. A device, characterized in that, The glass comprises any one of the tempered glass according to claims 1 to 10 and 22, or any one of the glass compositions according to claims 11 to 20, or any one of the glass elements according to claim 23, or any one of the glass covers according to claim 24.

26. A method for manufacturing tempered glass, characterized in that, The method includes the following steps: 1) forming a glass composition; 2) chemically strengthening the glass composition, or chemically strengthening the glass composition after processing it into a glass preform, wherein the chemical strengthening treatment includes immersing the glass composition or glass preform in molten sodium and / or potassium salts.

27. The method for manufacturing tempered glass according to claim 26, characterized in that, The chemical strengthening treatment includes a one-step chemical strengthening method or a multi-step chemical strengthening method. Optionally, the chemical strengthening treatment is a multi-step chemical strengthening method, and more preferably, it is a two-step chemical strengthening method. In the two-step chemical strengthening method, the first step involves immersing the glass composition or glass preform in a molten salt containing sodium salt. The first step chemical strengthening temperature is 400–550°C, optionally 420–520°C, and more preferably 430–500°C. The first step chemical strengthening time is 1–11 hours, optionally 1–9 hours, and more preferably 1–7 hours. The second step chemical strengthening involves immersing the glass composition or glass preform after the first step chemical strengthening in a molten salt containing potassium salt. The second step chemical strengthening temperature is 420–520°C, optionally 430–500°C, and more preferably 440–490°C. The second step chemical strengthening time is 10 minutes to 2.5 hours, optionally 20 minutes to 2 hours.

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