Glass composition and glass element

Abstract

Provided is a glass composition having a low transition temperature. The glass composition comprises the following components in percentage by weight: 52.5 to 66.0 percent of SiO2; 3.0 to 16.0 percent of B2O3 (boron trioxide); 9.0 to 22.0 percent of Al2O3 (aluminum oxide); srO: greater than 0% but less than or equal to 5.0%; li2O: greater than 0% but less than or equal to 8.0%; na2O: greater than 0% but less than or equal to 7.0%, wherein Al2O3 / B2O3 is 0.7-5.0. Through reasonable component design, the glass composition obtained by the invention has a relatively low transition temperature.

Description

Technical Field

[0001] This invention relates to a glass composition, and more particularly to a glass composition with a low transition temperature. Background Technology

[0002] In recent years, with the rapid development of fields such as intelligent driving and high-definition imaging, glass, as an important basic material, has been widely used in automotive imaging, security monitoring, and other fields. Currently, the mainstream method for manufacturing glass components is precision molding (including direct molding and secondary molding). Lenses manufactured using precision molding technology typically do not require grinding and polishing, thus reducing raw material consumption, labor and material costs, and environmental pollution. This technology allows for low-cost, mass production of glass components. Precision molding involves molding a glass preform with a high-precision mold of a predetermined shape under specific temperature and pressure conditions to obtain a glass component with the final product shape and optical functions. Various glass component products can be manufactured using precision molding technology, such as spherical lenses, aspherical lenses, prisms, and diffraction gratings. During precision molding, in order to replicate the high-precision mold surface onto the finished glass product, the glass preform needs to be molded under pressure at high temperatures (usually above the glass transition temperature of 20–60°C). At this temperature and pressure, even under a protective gas environment, the mold surface is easily oxidized and corroded. To extend mold life and suppress damage caused by high temperatures, the molding temperature must be reduced. Therefore, the transition temperature (Ttransition temperature) of the glass used for molding is crucial. g It needs to be as low as possible. Summary of the Invention

[0003] Based on the above reasons, the technical problem to be solved by the present invention is to provide a glass composition with a low transition temperature.

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

[0005] (1) A glass composition, the components of which are expressed as weight percentages, containing: SiO2: 52.5-66.0%; B2O3: 3.0-16.0%; Al2O3: 9.0-22.0%; SrO: greater than 0% but less than or equal to 5.0%; Li2O: greater than 0% but less than or equal to 8.0%; Na2O: greater than 0% but less than or equal to 7.0%, wherein the Al2O3 / B2O3 ratio is 0.7-5.0.

[0006] (2) The glass composition according to (1), wherein the components, expressed in weight percentages, further contain: La2O3: 0–5.0%; and / or Gd2O3: 0–5.0%; and / or Y2O3: 0–6.0%; and / or K2O: 0–5.0%; and / or MgO: 0–5.0%; and / or CaO: 0–6.0%; and / or BaO: 0–7.0%; and / or ZnO: 0–6.0%; and / or ZrO2: 0-3.0%; and / or TiO2: 0-5.0%; and / or Nb2O5: 0-3.0%; and / or WO3: 0-3.0%; and / or Ta2O5: 0-3.0%; and / or GeO2: 0-3.0%; and / or P2O5: 0-3.0%; and / or clarifying agent: 0-2.0%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0007] (3) The glass composition according to (1) or (2), wherein the components are expressed in weight percentages, wherein: Al2O3 / B2O3 is 1.0 to 3.0, preferably Al2O3 / B2O3 is 1.2 to 1.87; and / or Al2O3 / (Na2O+K2O) is 1.0 to 10.0, preferably Al2O3 / (Na2O+K2O) is 1.5 to 8.0, more preferably Al2O3 / (Na2O+K2O) is 2.0 to 6.0; and / or (CaO+BaO) is 1.5 to 8.0. The ratio of (CaO+BaO) / Al2O3 is 0.05 to 1.0, preferably 0.1 to 0.8, more preferably 0.2 to 0.6; and / or the ratio of SiO2 / (MgO+CaO+SrO+BaO) is 3.0 to 12.0, preferably 5.0 to 10.0, more preferably 6.5 to 8.5.

[0008] (4) The glass composition according to (1) or (2), wherein the components are expressed as weight percentages, wherein: La2O3+Gd2O3+Y2O3: greater than 0% but less than or equal to 10.0%, preferably La2O3+Gd2O3+Y2O3: 0.5-9.0%, more preferably La2O3+Gd2O3+Y2O3: 2.0-7.0%; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.05-3.5, preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.1-2.0, more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; The ratio of (La2O3+Y2O3) / Al2O3 is 0.02-0.9, preferably 0.05-0.7, more preferably 0.1-0.5; and / or (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 0.5-10.0, preferably 1.0-7.0, more preferably 1.5-5.0; and / or SrO / Li2O is 0.02-10.0, preferably 0.1-5.0, more preferably 0.2-1.0.

[0009] (5) The glass composition according to (1) or (2), wherein the components, expressed as weight percentages, contain: SiO2: 54.0–64.0%, preferably SiO2: 56.0–62.0%; and / or B2O3: 6.0–15.0%, preferably B2O3: 8.0–13.0%; and / or Al2O3: 11.0–20.0%, preferably Al2O3: 13.0–18.0%; and / or SrO: greater than 0% but less than or equal to 4.0%, preferably SrO: 0.5–3.0%; and / or Li2O: 1.0–7.0%, preferably Li2O: 2.0–6.0%; and / or Na₂O: 1.0–6.0%, preferably Na₂O: 2.0–5.0%; and / or K₂O: 0–4.0%, preferably K₂O: 0.5–3.0%; and / or La₂O₃: 0.5–4.0%, preferably La₂O₃: 1.0–3.0%; and / or Gd₂O₃: 0–3.0%, preferably Gd₂O₃: 0–1.0%; and / or Y₂O₃: 0.5–5.0%, preferably Y₂O₃: 1.0–4.5%; and / or MgO: 0–4.0%, preferably MgO: 1.0–3.0%; and / or CaO CaO: 1.0–5.0%, preferably CaO: 2.0–4.0%; and / or BaO: 1.0–6.0%, preferably BaO: 2.0–5.0%; and / or ZnO: 0.5–6.0%, preferably ZnO: 1.0–5.0%; and / or ZrO2: 0–2.5%, preferably ZrO2: 0.5–2.0%; and / or TiO2: 0.5–4.0%, preferably TiO2: 1.0–3.0%; and / or Nb2O5: 0–2.0%, preferably Nb2O5: 0–1.0%, more preferably not containing Nb2O5; and / or WO3: 0–2.0%. 0%, preferably WO3: 0-1.0%, more preferably WO3-free; and / or Ta2O5: 0-2.0%, preferably Ta2O5: 0-1.0%, more preferably Ta2O5-free; and / or GeO2: 0-2.0%, preferably GeO2: 0-1.0%, more preferably GeO2-free; and / or P2O5: 0-2.0%, preferably P2O5: 0-1.0%, more preferably P2O5-free; and / or clarifying agent: 0-1.0%, preferably 0-0.5%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0010] (6) The glass composition according to (1) or (2), wherein the coefficient of thermal expansion of the glass composition is α 20 / 300℃ 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K; and / or water resistance stability D W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of class 2 or more, preferably class 1; and / or Young's modulus E is 72 GPa or more, preferably 74 GPa or more, more preferably 76 GPa or more, and even more preferably 78 GPa or more; and / or transition temperature T g The temperature is 500–570°C, preferably 510–550°C, more preferably 525–540°C; and / or the density ρ is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 The viscosity at a high temperature of 1400°C is 270–340 poise, preferably 280–320 poise, and more preferably 285–310 poise.

[0011] (7) The tempered glass, whose composition is expressed as a weight percentage, contains: SiO2: 52.5-66.0%; B2O3: 3.0-16.0%; Al2O3: 9.0-22.0%; SrO: greater than 0% but less than or equal to 5.0%; Li2O: greater than 0% but less than or equal to 8.0%; Na2O: greater than 0% but less than or equal to 7.0%, of which Al2O3 / B2O3 is 0.7-5.0.

[0012] (8) The tempered glass according to (7), wherein the composition, expressed as a percentage by weight, further comprises: La₂O₃: 0–5.0%; and / or Gd₂O₃: 0–5.0%; and / or Y₂O₃: 0–6.0%; and / or K₂O: 0–5.0%; and / or MgO: 0–5.0%; and / or CaO: 0–6.0%; and / or BaO: 0–7.0%; and / or ZnO: 0–6.0%; and / or ZrO2: 0-3.0%; and / or TiO2: 0-5.0%; and / or Nb2O5: 0-3.0%; and / or WO3: 0-3.0%; and / or Ta2O5: 0-3.0%; and / or GeO2: 0-3.0%; and / or P2O5: 0-3.0%; and / or clarifying agent: 0-2.0%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0013] (9) The tempered glass according to (7) or (8) comprises, by weight percentage: Al2O3 / B2O3 is 1.0 to 3.0, preferably 1.2 to 1.87; and / or Al2O3 / (Na2O+K2O) is 1.0 to 10.0, preferably 1.5 to 8.0, more preferably 2.0 to 6.0; and / or (CaO+BaO) The ratio of (CaO+BaO) / Al2O3 is 0.05 to 1.0, preferably 0.1 to 0.8, more preferably 0.2 to 0.6; and / or the ratio of SiO2 / (MgO+CaO+SrO+BaO) is 3.0 to 12.0, preferably 5.0 to 10.0, more preferably 6.5 to 8.5.

[0014] (10) The tempered glass according to (7) or (8) wherein the composition is expressed as a weight percentage, wherein: La2O3+Gd2O3+Y2O3: greater than 0% but less than or equal to 10.0%, preferably La2O3+Gd2O3+Y2O3: 0.5-9.0%, more preferably La2O3+Gd2O3+Y2O3: 2.0-7.0%; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.05-3.5, preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.1-2.0, more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; The ratio of (La2O3+Y2O3) / Al2O3 is 0.02-0.9, preferably 0.05-0.7, more preferably 0.1-0.5; and / or (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 0.5-10.0, preferably 1.0-7.0, more preferably 1.5-5.0; and / or SrO / Li2O is 0.02-10.0, preferably 0.1-5.0, more preferably 0.2-1.0.

[0015] (11) The tempered glass according to (7) or (8) comprises, by weight percentage: SiO2: 54.0–64.0%, preferably SiO2: 56.0–62.0%; and / or B2O3: 6.0–15.0%, preferably B2O3: 8.0–13.0%; and / or Al2O3: 11.0–20.0%, preferably Al2O3: 13.0–18.0%; and / or SrO: greater than 0% but less than or equal to 4.0%, preferably SrO: 0.5–3.0%; and / or Li2O: 1.0–7.0%, preferably Li2O: 2.0–6.0%; and / or Na₂O: 1.0–6.0%, preferably Na₂O: 2.0–5.0%; and / or K₂O: 0–4.0%, preferably K₂O: 0.5–3.0%; and / or La₂O₃: 0.5–4.0%, preferably La₂O₃: 1.0–3.0%; and / or Gd₂O₃: 0–3.0%, preferably Gd₂O₃: 0–1.0%; and / or Y₂O₃: 0.5–5.0%, preferably Y₂O₃: 1.0–4.5%; and / or MgO: 0–4.0%, preferably MgO: 1.0–3.0%; and / or CaO CaO: 1.0–5.0%, preferably CaO: 2.0–4.0%; and / or BaO: 1.0–6.0%, preferably BaO: 2.0–5.0%; and / or ZnO: 0.5–6.0%, preferably ZnO: 1.0–5.0%; and / or ZrO2: 0–2.5%, preferably ZrO2: 0.5–2.0%; and / or TiO2: 0.5–4.0%, preferably TiO2: 1.0–3.0%; and / or Nb2O5: 0–2.0%, preferably Nb2O5: 0–1.0%, more preferably not containing Nb2O5; and / or WO3: 0–2.0%. 0%, preferably WO3: 0-1.0%, more preferably WO3-free; and / or Ta2O5: 0-2.0%, preferably Ta2O5: 0-1.0%, more preferably Ta2O5-free; and / or GeO2: 0-2.0%, preferably GeO2: 0-1.0%, more preferably GeO2-free; and / or P2O5: 0-2.0%, preferably P2O5: 0-1.0%, more preferably P2O5-free; and / or clarifying agent: 0-1.0%, preferably 0-0.5%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

[0016] (12) The tempered glass according to (7) or (8), wherein the coefficient of thermal expansion of the tempered glass is α 20 / 300℃ 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K; and / or water resistance stability D W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of class 2 or more, preferably class 1; and / or Young's modulus E is 72 GPa or more, preferably 74 GPa or more, more preferably 76 GPa or more, and even more preferably 78 GPa or more; and / or transition temperature T g The temperature is 500–570°C, preferably 510–550°C, more preferably 525–540°C; and / or the density ρ is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 The following are provided: and / or the high-temperature viscosity at 1400°C is 270–340 poise, preferably 280–320 poise, more preferably 285–310 poise; and / or the ion exchange layer depth is 40 μm or more, preferably 50 μm or more, more preferably 60 μm or more.

[0017] (13) The tempered glass according to (7) or (8) has a four-point bending strength of 500 MPa or more, preferably 600 MPa or more, more preferably 700 MPa or more, and even more preferably 720 MPa or more.

[0018] (14) The tempered glass according to (13) has a thickness of 0.1 to 1.5 mm, preferably 0.3 to 1.3 mm, more preferably 0.5 to 1.2 mm, and even more preferably 0.8 mm, 0.9 mm, 1.0 mm, or 1.1 mm.

[0019] (15) A glass element made of any of the glass compositions described in (1) to (6) or of any of the tempered glass compositions described in (7) to (14).

[0020] (16) An apparatus comprising any of the glass compositions described in (1) to (6), or comprising any of the tempered glass described in (7) to (14), or comprising the glass element described in (15).

[0021] The beneficial effect of the present invention is that, through reasonable component design, the glass composition obtained by the present invention has a lower transition temperature.

[0022] In some embodiments, the glass composition of the present invention can also be chemically strengthened to obtain reinforced glass, which has a higher ion exchange layer depth. Detailed Implementation

[0023] Glass used in automotive imaging, security monitoring, and other fields requires high impact and drop resistance. Generally, the main reason for low glass strength and poor impact resistance is glass failure due to crack propagation, and the stress required for the propagation of surface and subsurface microcracks is low. Regardless of the method used, it is difficult to completely eliminate surface and subsurface microcracks; therefore, the main way to improve the drop and impact resistance of glass is through post-processing strengthening. The glass composition of this invention can be chemically strengthened to produce reinforced glass, which can be widely used in applications where glass is relatively thin, such as mobile phone screens and smart wearable device screens.

[0024] The embodiments of the glass composition and strengthened glass 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 the present invention, glass that has not undergone chemical strengthening treatment is called a glass composition (in this specification, glass composition can be simply referred to as glass); a glass composition that has undergone chemical strengthening treatment is called strengthened glass.

[0025] [Glass compositions and tempered glass]

[0026] 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 of each component, the total content, and the total amount are all expressed as weight percentages (wt%), that is, the weight percentage of the content of each component, the total content, and the total amount relative to the total amount of glass material converted into oxide composition. Here, "converted into oxide composition" means that when the oxides, complex salts, and hydroxides used as raw materials for the glass composition and tempered glass of the present invention decompose and transform into oxides upon melting, the total amount of such oxides is taken as 100%.

[0027] 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.

[0028] <Essential and Optional Components>

[0029] SiO2 is a major component constituting the glass framework, promoting stable glass formation and improving the glass's resistance to devitrification and chemical stability. In this invention, the above effects are achieved by containing 52.5% or more SiO2, preferably 54.0% or more, and more preferably 56.0% or more. On the other hand, by controlling the SiO2 content to 66.0% or less, deterioration of glass meltability and excessive increase in high-temperature viscosity can be prevented. Preferably, the SiO2 content is 64.0% or less, and more preferably 62.0% or less. In some embodiments, the SiO2 content can be 52.5%, 53.0%, 53.5%, 54.0%, 54.5%, 55.0%, 55.5%, 56.0%, 56.5%, 57.0%, 57.5%, 58.0%, 58.5%, 59.0%, 59.5%, 60.0%, 60.5%, 61.0%, 61.5%, 62.0%, 62.5%, 63.0%, 63.5%, 64.0%, 64.5%, 65.0%, 65.5%, 66.0%, 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.

[0030] B₂O₃ can improve the thermal stability and melt properties of glass. In this invention, the above-mentioned effects are achieved by containing more than 3.0% B₂O₃, which is beneficial for obtaining homogeneous glass. On the other hand, if the B₂O₃ content exceeds 16.0%, the chemical stability of the glass decreases, and the coefficient of thermal expansion is difficult to reach the desired range. Therefore, in this invention, the B₂O₃ content is 3.0% to 16.0%, preferably 6.0% to 15.0%, and more preferably 8.0% to 13.0%. In some embodiments, the content of B2O3 can be 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, 15.0%, 15.5%, 16.0%, 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.

[0031] Al2O3 can improve the devitrification resistance and chemical stability of glass, reduce the coefficient of thermal expansion, and expand ion exchange channels to enhance chemical strengthening. However, if its content is too high, the meltability of the glass deteriorates and the high-temperature viscosity increases. Therefore, the Al2O3 content in this invention is 9.0%–22.0%, preferably 11.0%–20.0%, and more preferably 13.0%–18.0%. In some embodiments, the Al2O3 content can be 9.0%, 9.5%, 10.0%, 10.5%, 11.0%, 11.5%, 12.0%, 12.5%, 13.0%, 13.5%, 14.0%, 14.5%, 15.0%, 15.5%, 16.0%, 16.5%, 17.0%, 17.5%, 18.0%, 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.

[0032] In some embodiments, controlling the Al2O3 / B2O3 ratio (Al2O3 / B2O3) within the range of 0.7 to 5.0 can improve the chemical strengthening properties of the glass composition and increase the ion exchange layer depth of the strengthened glass while lowering the transition temperature of the glass composition and the strengthened glass. Therefore, an Al2O3 / B2O3 ratio of 0.7 to 5.0 is preferred, an Al2O3 / B2O3 ratio of 1.0 to 3.0 is more preferred, and an Al2O3 / B2O3 ratio of 1.2 to 1.87 is even more preferred. In some implementations, the Al2O3 / B2O3 ratio can be 0.7, 0.73, 0.75, 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 0.93, 0.95, 0.97, 1.0, 1.03, 1.05, 1.07, 1.1, 1.13, 1.15, 1.17, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.87, 1.9, or 1.95. The values ​​are 2.0, 2.05, 2.1, 2.15, 2.2, 2.25, 2.3, 2.35, 2.4, 2.45, 2.5, 2.55, 2.6, 2.65, 2.7, 2.75, 2.8, 2.85, 2.9, 2.95, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 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.

[0033] MgO is beneficial for reducing the density and melting temperature of glass, but excessive MgO content reduces the glass's resistance to crystallization and its stability. Therefore, in this invention, the MgO content is 0-5.0%, preferably 0-4.0%, and more preferably 1.0-3.0%. In some embodiments, the MgO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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.

[0034] CaO is beneficial for improving the mechanical properties and weather resistance of glass, but if its content is too high, glass melting becomes difficult, and a calcium-rich hard shell easily forms in the melting bath during production, which is detrimental to the chemical strengthening properties of the glass. Therefore, the CaO content is 0-6.0%, preferably 1.0-5.0%, and more preferably 2.0-4.0%. In some embodiments, the CaO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 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.

[0035] SrO can adjust the high-temperature viscosity of glass and improve its stability, but if its content is too high, the chemical stability of the glass will decrease. Therefore, the SrO content is greater than 0% but less than or equal to 5.0%, preferably greater than 0% but less than or equal to 4.0%, and more preferably 0.5% to 3.0%. In some embodiments, the SrO content can be greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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.

[0036] BaO can improve the hardness of glass and reduce its coefficient of thermal expansion, but if its content is too high, the glass's devitrification resistance will worsen, and it will also be detrimental to the glass's chemical strengthening properties. Therefore, the BaO content is 0-7.0%, preferably 1.0-6.0%, and more preferably 2.0-5.0%. In some embodiments, the BaO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 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.

[0037] In some embodiments, controlling the ratio of the total content of CaO and BaO (CaO+BaO) to the content of Al2O3 ((CaO+BaO) / Al2O3) within the range of 0.05 to 1.0 makes it easier for the glass composition and the strengthened glass to obtain the desired coefficient of thermal expansion of the present invention, and improves the chemical strengthening properties of the glass composition and the four-point bending strength of the strengthened glass. Therefore, it is preferable that (CaO+BaO) / Al2O3 is 0.05 to 1.0, more preferably 0.1 to 0.8, and even more preferably 0.2 to 0.6. In some implementations, (CaO+BaO) / Al2O3 can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.13, 0.15, 0.17, 0.2, 0.23, 0.25, 0.27, 0.3, 0.33, 0.35, 0.37, 0.4, 0.43, 0.45, 0.47, 0.5, 0.53, 0.55, 0.57, 0.6, 0.63, 0.65, 0.67, 0.7, 0.73, 0.75, 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 0.93, 0.95, 0.97, 1.0, 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.

[0038] In some embodiments, the ratio of SiO2 content to the total content of MgO, CaO, SrO, and BaO (MgO+CaO+SrO+BaO), SiO2 / (MgO+CaO+SrO+BaO), is controlled within the range of 3.0 to 12.0. This can improve the chemical strengthening properties of the glass composition and increase the ion exchange layer depth of the strengthened glass while lowering the transition temperature of the glass composition and the strengthened glass. Therefore, a SiO2 / (MgO+CaO+SrO+BaO) ratio of 3.0 to 12.0 is preferred, a SiO2 / (MgO+CaO+SrO+BaO) ratio of 5.0 to 10.0 is more preferred, and a SiO2 / (MgO+CaO+SrO+BaO) ratio of 6.5 to 8.5 is even more preferred. In some embodiments, SiO2 / (MgO+CaO+SrO+BaO) can be 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7 6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10.0, 10.1, 10.2, 10.3, 10.4, 10.5, 10.6, 10.7, 10.8, 10.9, 11.0, 11.1, 11.2, 11.3, 11.4, 11.5, 11.6, 11.7, 11.8, 11.9, 12.0, 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.

[0039] ZnO can lower the glass transition temperature and fusing temperature, improve the chemical stability of the glass, and reduce the high-temperature viscosity of the glass. However, if the ZnO content is too high, the glass's resistance to crystallization deteriorates. Therefore, the ZnO content in this invention is 0-6.0%, preferably 0.5-6.0%, and more preferably 1.0-5.0%. In some embodiments, the ZnO content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 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] ZrO2 can improve the refractive index and chemical stability of glass, reduce its coefficient of thermal expansion, and optimize its high-temperature viscosity; however, when the ZrO2 content is too high, the glass's devitrification resistance decreases. Therefore, the ZrO2 content is 0–3.0%, preferably 0–2.5%, and more preferably 0.5–2.0%. In some embodiments, the ZrO2 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 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] TiO2 can improve the thermal stability of glass and adjust its coefficient of thermal expansion. However, if its content is too high, the light transmittance of the glass will decrease rapidly, and the coefficient of thermal expansion will be difficult to meet design requirements. Therefore, the TiO2 content is 0–5.0%, preferably 0.5–4.0%, and more preferably 1.0–3.0%. In some embodiments, the TiO2 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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] La2O3 can improve the chemical stability and devitrification resistance of glass, but if its content is too high, the ultraviolet light transmittance of the glass will decrease. Therefore, the content of La2O3 is 0-5.0%, preferably 0.5-4.0%, and more preferably 1.0-3.0%. In some embodiments, the content of La2O3 can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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] Y₂O₃ is beneficial for improving the Young's modulus of glass, but if its content is too high, the chemical stability and ultraviolet transmittance of the glass will decrease. Therefore, the content of Y₂O₃ is 0-6.0%, preferably 0.5-5.0%, and more preferably 1.0-4.5%. In some embodiments, the content of Y₂O₃ can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 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.

[0044] In some embodiments, controlling the ratio of the total content of La2O3 and Y2O3 (La2O3+Y2O3) to the content of Al2O3 (La2O3+Y2O3) / Al2O3 within the range of 0.02 to 0.9 can improve the chemical stability of the glass composition and the strengthened glass while also increasing their Young's modulus. Therefore, it is preferable that (La2O3+Y2O3) / Al2O3 is 0.02 to 0.9, more preferably 0.05 to 0.7, and even more preferably 0.1 to 0.5. In some implementations, (La2O3+Y2O3) / Al2O3 can be 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.13, 0.15, 0.17, 0.2, 0.23, 0.25, 0.27, 0.3, 0.33, 0.35, 0.37, 0.4, 0.43, 0.45, 0.47, 0.5, 0.53, 0.55, 0.57, 0.6, 0.63, 0.65, 0.67, 0.7, 0.73, 0.75, 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 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.

[0045] Gd₂O₃ can improve the chemical stability of glass, but if its content is too high, the glass's devitrification resistance will decrease and its density will increase. Therefore, the content of Gd₂O₃ is 0-5.0%, preferably 0-3.0%, and more preferably 0-1.0%. In some embodiments, the content of Gd₂O₃ can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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.

[0046] In some embodiments, by ensuring that the total content of La2O3, Y2O3, and Gd2O3 (La2O3+Y2O3+Gd2O3) is greater than 0% but less than or equal to 10.0%, the chemical stability of the glass can be improved while preventing a decrease in its devitrification resistance and ultraviolet light transmittance. Therefore, it is preferable that La2O3+Y2O3+Gd2O3 is greater than 0% but less than or equal to 10%, more preferably 0.5% to 9.0%, and even more preferably 2.0% to 7.0%. In some embodiments, La2O3+Y2O3+Gd2O3 can be greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 8.5%, 9.0%, 9.5%, 10.0%, 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.

[0047] Nb₂O₅ can improve the devitrification resistance of glass and reduce its coefficient of thermal expansion. However, if its content is too high, the ultraviolet light transmittance of the glass will decrease, and the coefficient of thermal expansion will be too low. Therefore, the Nb₂O₅ content is 0–3.0%, preferably 0–2.0%, and more preferably 0–1.0%. In some embodiments, it is further preferred that the glass does not contain Nb₂O₅. In some embodiments, the Nb₂O₅ content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 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.

[0048] WO3 can improve the refractive index and resistance to crystallization of glass, but if its content is too high, the visible light transmittance of the glass will decrease. Therefore, the WO3 content is 0-3.0%, preferably 0-2.0%, and more preferably 0-1.0%. In some embodiments, it is further preferred that WO3 is not present. In some embodiments, the WO3 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 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.

[0049] Ta₂O₅ can increase the refractive index of glass, but high Ta₂O₅ content significantly increases the cost of glass and worsens its melting properties, increases density, and raises the transition temperature. Therefore, the Ta₂O₅ content is 0–3.0%, preferably 0–2.0%, and more preferably 0–1.0%. In some embodiments, it is further preferred that Ta₂O₅ is not present. In some embodiments, the Ta₂O₅ content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 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] GeO2 can improve the refractive index and devitrification resistance of glass. However, the presence of GeO2 in glass is detrimental to the control of glass raw material costs, and its high content reduces the chemical stability of the glass. Therefore, the GeO2 content is 0-3.0%, preferably 0-2.0%, and more preferably 0-1.0%. In some embodiments, it is further preferred that the glass does not contain GeO2. In some embodiments, the GeO2 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 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.

[0051] Li₂O can improve the melting properties of glass and lower the transition temperature. It is also a major component of ion exchange during the chemical strengthening process of the glass composition of this invention. If its content is too high, the devitrification resistance of the glass deteriorates. Therefore, the Li₂O content in this invention is greater than 0% but less than or equal to 8.0%, preferably 1.0% to 7.0%, and more preferably 2.0% to 6.0%. In some embodiments, the Li₂O content can be greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 7.5%, 8.0%, 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] In some embodiments, controlling the SrO / Li2O ratio (SrO / Li2O) within the range of 0.02 to 10.0 is beneficial for the glass composition and tempered glass to possess both a good coefficient of thermal expansion and excellent high-temperature viscosity. Therefore, a SrO / Li2O ratio of 0.02 to 10.0 is preferred, more preferably 0.1 to 5.0, and even more preferably 0.2 to 1.0. In some implementations, the SrO / Li2O can be 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.13, 0.15, 0.17, 0.2, 0.23, 0.25, 0.27, 0.3, 0.33, 0.35, 0.37, 0.4, 0.43, 0.45, 0.47, 0.5, 0.53, 0.55, 0.57, 0.6, or 0. 63, 0.65, 0.67, 0.7, 0.73, 0.75, 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 0.93, 0.95, 0.97, 1.0, 1.03, 1.05, 1.07, 1.1, 1.13, 1.15, 1.17, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2 5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6. 5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10.0, 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.

[0053] Na₂O can improve the meltability of glass, reduce its high-temperature viscosity, and optimize its light transmittance. However, excessive Na₂O content is detrimental to the glass's coefficient of thermal expansion and chemical stability. Therefore, the Na₂O content is greater than 0% but less than or equal to 7.0%, preferably 1.0% to 6.0%, and more preferably 2.0% to 5.0%. In some embodiments, the Na₂O content can be greater than 0%, 0.01%, 0.05%, 0.1%, 0.5%, 1.0%, 1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, 6.0%, 6.5%, 7.0%, 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.

[0054] K₂O improves the thermal stability and melt permeability of glass, but excessive K₂O content reduces the glass's resistance to devitrification and deteriorates its chemical strengthening properties. Therefore, the K₂O content is 0–5.0%, preferably 0–4.0%, and more preferably 0.5–3.0%. In some embodiments, the K₂O content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.3%, 2.5%, 2.7%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 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.

[0055] In some embodiments, controlling the ratio of Al2O3 content to the total content of Na2O and K2O (Na2O+K2O), Al2O3 / (Na2O+K2O), within the range of 1.0 to 10.0, can reduce the density of the glass composition and the strengthened glass while achieving better high-temperature viscosity. Therefore, it is preferable that Al2O3 / (Na2O+K2O) is 1.0 to 10.0, more preferably 1.5 to 8.0, and even more preferably 2.0 to 6.0. In some implementations, Al2O3 / (Na2O+K2O) can be 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, 5.0, 5.1, 5.2, 5.3, 5. 4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10.0, 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.

[0056] In some embodiments, the ratio (La2O3+Y2O3) / (Li2O+Na2O+K2O) between the total content of La2O3 and Y2O3 (La2O3+Y2O3) and the total content of Li2O, Na2O, and K2O (Li2O+Na2O+K2O) is controlled within the range of 0.05 to 3.5. This can improve the chemical strengthening properties of the glass composition and the four-point flexural strength of the strengthened glass while increasing the Young's modulus of the glass composition and the strengthened glass. Therefore, it is preferable that (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.05 to 3.5, more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.1 to 2.0, and even more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2 to 1.0. In some implementations, (La₂O₃+Y₂O₃) / (Li₂O+Na₂O+K₂O) can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.13, 0.15, 0.17, 0.2, 0.23, 0.25, 0.27, 0.3, 0.33, 0.35, 0.37, 0.4, 0.43, 0.45, 0.47, 0.5, 0.53, 0.55, 0.57, 0.6, 0.63, 0.65, 0.67, 0.7, 0.73, 0.75, 0 0.77, 0.8, 0.83, 0.85, 0.87, 0.9, 0.93, 0.95, 0.97, 1.0, 1.03, 1.05, 1.07, 1.1, 1.13, 1.15, 1.17, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 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.

[0057] In some embodiments, by controlling the ratio (Li2O+Na2O+K2O) / (ZrO2+TiO2) between the total content of Li2O, Na2O, and K2O (Li2O+Na2O+K2O) and the total content of ZrO2 and TiO2 (ZrO2+TiO2), in the range of 0.5 to 10.0, the glass composition and the strengthened glass can have a good coefficient of thermal expansion while improving the chemical strengthening performance of the glass composition and increasing the depth of the ion exchange layer of the strengthened glass. Therefore, it is preferable that (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 0.5 to 10.0, more preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.0 to 7.0, and even more preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.5 to 5.0. In some implementations, (Li₂O+Na₂O+K₂O) / (ZrO₂+TiO₂) can be 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, 3.7, 3.8, 3.9, 4.0, 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, or 5. 0, 5.1, 5.2, 5.3, 5.4, 5.5, 5.6, 5.7, 5.8, 5.9, 6.0, 6.1, 6.2, 6.3, 6.4, 6.5, 6.6, 6.7, 6.8, 6.9, 7.0, 7.1, 7.2, 7.3, 7.4, 7.5, 7.6, 7.7, 7.8, 7.9, 8.0, 8.1, 8.2, 8.3, 8.4, 8.5, 8.6, 8.7, 8.8, 8.9, 9.0, 9.1, 9.2, 9.3, 9.4, 9.5, 9.6, 9.7, 9.8, 9.9, 10.0, 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.

[0058] P2O5 can improve the devitrification resistance of glass, but its excessive content degrades the chemical stability and resistance to crystallization. Therefore, the P2O5 content is 0–3.0%, preferably 0–2.0%, and more preferably 0–1.0%. In some embodiments, it is further preferred that P2O5 is not present. In some embodiments, the P2O5 content can be 0%, greater than 0%, 0.01%, 0.05%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 2.5%, 3.0%, 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.

[0059] In this invention, by using one or more components selected from Sb₂O₃, SnO₂, and CeO₂ as a clarifying agent containing 0-2.0%, the clarifying effect of the glass can be improved, and the bubble content of the glass can be increased. Preferably, the content of the clarifying agent is 0-1.0%, more preferably 0-0.5%. When the Sb₂O₃ content exceeds 2.0%, the glass tends to have reduced clarifying performance. At the same time, due to its strong oxidizing effect, it promotes the corrosion of platinum or platinum alloy vessels used for molten glass and the deterioration of the forming mold. Therefore, in this invention, the Sb₂O₃ content is preferably 0-2.0%, more preferably 0-1.0%, and even more preferably 0-0.5%. In some embodiments, the Sb₂O₃ 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%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 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. SnO2 can also be used as a clarifying agent, but when its content exceeds 2.0%, the tendency for glass coloring increases. Alternatively, when the glass is heated, softened, and then molded, Sn can become the starting point for crystal nucleation, leading to a tendency for devitrification. Therefore, the SnO2 content of this invention is preferably 0–2.0%, more preferably 0–1.0%, and even more preferably 0–0.5%. In some embodiments, the SnO2 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%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 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. The role and content of CeO2 are consistent with SnO2, and its content is preferably 0–2.0%, more preferably 0–1.0%, and even more preferably 0–0.5%.In some embodiments, the CeO2 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%, 1.0%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2.0%, 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.

[0060] <Components that should not be present>

[0061] Fe2O3 can cause glass discoloration, which is detrimental to achieving excellent light transmittance. Therefore, in some embodiments, the glass composition and the tempered glass preferably do not contain Fe2O3.

[0062] Fluorine (F) volatilizes during the glass melting process, causing instability in the glass composition and reducing its quality. Therefore, in some embodiments, the glass composition and the tempered glass preferably do not contain F.

[0063] In the glass compositions and tempered glass of the present invention, even if oxides of transition metals such as V, Cr, Mn, Fe, Co, Ni, Cu, Ag, and Mo are contained in small amounts, either alone or in combination, the glass compositions and tempered glass will be colored and absorb at specific wavelengths in the visible light region, thereby weakening the property of the present invention to improve visible light transmittance. Therefore, it is preferable that the glass compositions and tempered glass, especially those requiring transmittance in the visible light region, do not actually contain the above-mentioned components.

[0064] Oxides of Th, Cd, Tl, Os, Be, and Se have been increasingly subject to controlled use in recent years due to their status as hazardous chemicals. Environmental protection measures are essential not only in the manufacturing process of glass compositions and tempered glass, but also in processing and post-product disposal. Therefore, given the importance of environmental impact, it is preferable to avoid their presence altogether, except where unavoidable contamination occurs. Consequently, the glass compositions and tempered glass become virtually free of pollutants. Therefore, the glass compositions and tempered glass of this invention can be manufactured, processed, and disposed of even without specific environmental countermeasures.

[0065] To achieve environmental friendliness, the glass compositions and tempered glasses of the present invention preferably do not contain As2O3 and PbO.

[0066] The terms "not containing" and "0%" as 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.

[0067] The properties of the glass composition and the tempered glass of the present invention will now be described.

[0068] Coefficient of thermal expansion

[0069] The coefficient of thermal expansion (α) of glass compositions and tempered glass 20 / 300℃ Data at 20–300°C were tested according to the method specified in the national standard GB / T 7962.16-2010. When the glass composition or tempered glass of this invention is applied in the semiconductor packaging field, the coefficient of thermal expansion of the glass composition and tempered glass should not be too high or too low, and should be thermally matched with the packaging medium to prevent excessive difference in the coefficient of thermal expansion from causing stress rise in the interface layer and resulting in cracking.

[0070] <Stability under water resistance>

[0071] Water resistance stability of glass compositions and tempered glass (D) W (Powder method) Tested according to the method specified in the national standard GB / T17129. In this specification, water resistance stability is sometimes simply referred to as water resistance or water stability. The better the water resistance of the glass composition and the stronger the glass, the more effectively water erosion can be avoided during application.

[0072] <Stability under acid conditions>

[0073] Acid resistance stability of glass compositions and tempered glass (D) A (Powder method) Tested according to the method specified in the national standard GB / T17129. In this specification, acid resistance stability is sometimes simply referred to as acid resistance or acid stability. In the application of glass compositions and tempered glass, in highly acidic environments, the better the acid resistance, the less likely the glass compositions and tempered glass are to fail.

[0074] Young's Modulus

[0075] The Young's modulus (E) of the glass composition and the tempered glass was obtained by ultrasonic testing of its longitudinal wave velocity and transverse wave velocity, and then calculated according to the following formula.

[0076] The following formula is used to calculate:

[0077]

[0078] Where G = V S 2 ρ

[0079] In the formula:

[0080] E is Young's modulus, in Pa;

[0081] G is the shear modulus, Pa;

[0082] V T The longitudinal wave velocity is given in m / s.

[0083] V S The transverse wave velocity is in m / s;

[0084] ρ is the density of glass, in g / cm³ 3 .

[0085] The higher the Young's modulus of the glass composition and the stronger the glass, the less likely it is to deform during application.

[0086] <Transition Temperature>

[0087] Transition temperature (T) of glass composition and tempered glass g Test according to the method specified in the national standard GB / T 7962.16-2010.

[0088] <Density>

[0089] The density (ρ) of the glass composition and tempered glass was tested according to the method specified in the national standard GB / T 7962.20-2010. The lower the density of the glass composition and tempered glass, the more beneficial it is to achieve lightweight application end products.

[0090] <High Temperature Viscosity>

[0091] The high-temperature viscosity of the glass composition and the tempered glass was tested using the following method: the rotation method was used with a THETA Rheotronic II high-temperature viscometer, and the unit of measurement was poise. The smaller the value, the lower the viscosity.

[0092] <Ion exchange layer depth>

[0093] The depth of the ion exchange layer in the reinforced glass material was tested using a SLP-2000 glass surface stress meter. The calculations were performed with the sample having a refractive index of 1.51 and an optical elastic constant of 29 [(nm / cm) / MPa].

[0094] Four-point bending strength

[0095] The four-point bending strength of tempered glass was tested using a CMT6502 electronic universal testing machine, according to the standard ASTM C158-2002. In this invention, the four-point bending strength can be referred to as bending strength or strength.

[0096] The glass composition of the present invention has the following properties:

[0097] 1) In some embodiments, the coefficient of thermal expansion (α) of the glass composition of the present invention is... 20 / 300℃ ) is 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K. In some implementations, the coefficient of thermal expansion (α) 20 / 300℃ ) can be 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, etc., and all ranges and subranges between the above values.

[0098] 2) In some embodiments, the water resistance stability (D) of the glass composition of the present invention is... W There are two or more categories, with category 1 being preferred.

[0099] 3) In some embodiments, the acid resistance stability (D) of the glass composition of the present invention is... A There are two or more categories, with category 1 being preferred.

[0100] 4) In some embodiments, the Young's modulus (E) of the glass composition of the present invention is 72 GPa or more, preferably 74 GPa or more, more preferably 76 GPa or more, and even more preferably 78 GPa or more. In some embodiments, the Young's modulus (E) can be 72 GPa, 73 GPa, 74 GPa, 75 GPa, 76 GPa, 77 GPa, 78 GPa, 79 GPa, 80 GPa, 81 GPa, 82 GPa, 83 GPa, 84 GPa, 85 GPa, 86 GPa, etc., as well as all ranges and subranges between the above values.

[0101] 5) In some embodiments, the transition temperature (T) of the glass composition of the present invention is... g The temperature range is 500–570°C, preferably 510–550°C, and more preferably 525–540°C. In some embodiments, the transition temperature (T) is... g The values ​​can be 500℃, 503℃, 505℃, 507℃, 510℃, 513℃, 515℃, 517℃, 520℃, 523℃, 525℃, 527℃, 530℃, 533℃, 535℃, 537℃, 540℃, 543℃, 545℃, 547℃, 550℃, 553℃, 555℃, 557℃, 560℃, 563℃, 565℃, 567℃, 570℃, etc., as well as all ranges and subranges between the above values.

[0102] 6) In some embodiments, the density (ρ) of the glass composition of the present invention is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 Below. In some embodiments, the density (ρ) can be 2.70 g / cm³. 3 2.69 g / cm 3 2.68g / cm 3 2.67 g / cm 3 2.66 g / cm 3 2.65g / cm 3 2.64 g / cm 3 2.63 g / cm 3 2.62 g / cm 3 2.61 g / cm 3 2.60g / cm 3 2.59g / cm 3 2.58g / cm 3 2.57g / cm 3 2.56 g / cm 3 2.55g / cm 32.54 g / cm 3 2.53g / cm 3 2.52g / cm 3 2.51g / cm 3 2.50g / cm 3 2.49 g / cm 3 2.48 g / cm 3 2.47 g / cm 3 2.46 g / cm 3 2.45g / cm 3 2.44 g / cm 3 2.43 g / cm 3 2.42 g / cm 3 2.41 g / cm 3 2.40 g / cm 3 2.39 g / cm 3 2.38g / cm 3 2.37 g / cm 3 2.36 g / cm 3 2.35g / cm 3 And so on, as well as all ranges and subranges between the above values.

[0103] 7) In some embodiments, the high-temperature viscosity of the glass composition of the present invention at 1400°C is 270–340 poise, preferably 280–320 poise, and more preferably 285–310 poise. In some embodiments, the high-temperature viscosity at 1400°C is 270 poise, 273 poise, 275 poise, 277 poise, 280 poise, 283 poise, 285 poise, 287 poise, 290 poise, 293 poise, 295 poise, 297 poise, 300 poise, 303 poise, 305 poise, 307 poise, 310 poise, 313 poise, 315 poise, 317 poise, 320 poise, 323 poise, 325 poise, 327 poise, 330 poise, 333 poise, 335 poise, 337 poise, 340 poise, etc., as well as all ranges and subranges between the above values.

[0104] The tempered glass of this invention has the following properties:

[0105] 1) In some embodiments, the coefficient of thermal expansion (α) of the tempered glass of the present invention is... 20 / 300℃ ) is 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K. In some implementations, the coefficient of thermal expansion (α) 20 / 300℃) can be 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, etc., and all ranges and subranges between the above values.

[0106] 2) In some embodiments, the present invention strengthens the water resistance stability (D) of the glass. W There are two or more categories, with category 1 being preferred.

[0107] 3) In some embodiments, the acid resistance stability (D) of the glass strengthened by the present invention is improved. A There are two or more categories, with category 1 being preferred.

[0108] 4) In some embodiments, the Young's modulus (E) of the tempered glass of the present invention is 72 GPa or higher, preferably 74 GPa or higher, more preferably 76 GPa or higher, and even more preferably 78 GPa or higher. In some embodiments, the Young's modulus (E) can be 72 GPa, 73 GPa, 74 GPa, 75 GPa, 76 GPa, 77 GPa, 78 GPa, 79 GPa, 80 GPa, 81 GPa, 82 GPa, 83 GPa, 84 GPa, 85 GPa, 86 GPa, etc., as well as all ranges and sub-ranges between the above values.

[0109] 5) In some embodiments, the transition temperature (T) of the tempered glass of the present invention is... g The temperature range is 500–570°C, preferably 510–550°C, and more preferably 525–540°C. In some embodiments, the transition temperature (T) is... gThe values ​​can be 500℃, 503℃, 505℃, 507℃, 510℃, 513℃, 515℃, 517℃, 520℃, 523℃, 525℃, 527℃, 530℃, 533℃, 535℃, 537℃, 540℃, 543℃, 545℃, 547℃, 550℃, 553℃, 555℃, 557℃, 560℃, 563℃, 565℃, 567℃, 570℃, etc., as well as all ranges and subranges between the above values.

[0110] 6) In some embodiments, the density (ρ) of the tempered glass of the present invention is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 Below. In some embodiments, the density (ρ) can be 2.70 g / cm³. 3 2.69 g / cm 3 2.68g / cm 3 2.67 g / cm 3 2.66 g / cm 3 2.65g / cm 3 2.64 g / cm 3 2.63 g / cm 3 2.62 g / cm 3 2.61 g / cm 3 2.60g / cm 3 2.59g / cm 3 2.58g / cm 3 2.57g / cm 3 2.56 g / cm 3 2.55g / cm 3 2.54 g / cm 3 2.53g / cm 3 2.52g / cm 3 2.51g / cm 3 2.50g / cm 3 2.49 g / cm 3 2.48 g / cm 3 2.47 g / cm 3 2.46 g / cm 3 2.45g / cm 3 2.44 g / cm 3 2.43 g / cm 3 2.42 g / cm 3 2.41 g / cm 3 2.40 g / cm 32.39 g / cm 3 2.38g / cm 3 2.37 g / cm 3 2.36 g / cm 3 2.35g / cm 3 And so on, as well as all ranges and subranges between the above values.

[0111] 7) In some embodiments, the high-temperature viscosity of the tempered glass of the present invention at 1400°C is 270–340 poise, preferably 280–320 poise, and more preferably 285–310 poise. In some embodiments, the high-temperature viscosity at 1400°C is 270 poise, 273 poise, 275 poise, 277 poise, 280 poise, 283 poise, 285 poise, 287 poise, 290 poise, 293 poise, 295 poise, 297 poise, 300 poise, 303 poise, 305 poise, 307 poise, 310 poise, 313 poise, 315 poise, 317 poise, 320 poise, 323 poise, 325 poise, 327 poise, 330 poise, 333 poise, 335 poise, 337 poise, 340 poise, etc., as well as all ranges and subranges between the above values.

[0112] 8) In some embodiments, the ion exchange layer depth of the tempered glass of the present invention is 40 μm or more, preferably 50 μm or more, and more preferably 60 μm or more. In some embodiments, the ion exchange layer depth can be 40 μm, 41 μm, 42 μm, 43 μm, 44 μm, 45 μm, 46 μm, 47 μm, 48 μm, 49 μm, 50 μm, 51 μm, 52 μm, 53 μm, 54 μm, 55 μm, 56 μm, 57 μm, 58 μm, 59 μm, 60 μm, 61 μm, 62 μm, 63 μm, 64 μm, 65 μm, 66 μm, 67 μm, 68 μm, 69 μm, 70 μm, etc., as well as all ranges and sub-ranges between the above values.

[0113] 9) In some embodiments, the four-point bending strength of the tempered glass of the present invention with a thickness of 1.5 mm or less is 500 MPa or more, preferably 600 MPa or more, more preferably 700 MPa or more, and even more preferably 720 MPa or more. In some embodiments, the four-point bending strength of the reinforced glass of the present invention with a thickness of less than 1.5 mm is 500 MPa, 510 MPa, 520 MPa, 530 MPa, 540 MPa, 550 MPa, 560 MPa, 570 MPa, 580 MPa, 590 MPa, 600 MPa, 610 MPa, 620 MPa, 630 MPa, 640 MPa, 650 MPa, 660 MPa, 670 MPa, 680 MPa, 690 MPa, 700 MPa, 710 MPa, 720 MPa, 730 MPa, 740 MPa, 750 MPa, 760 MPa, 770 MPa, 780 MPa, 790 MPa, 800 MPa, etc., as well as all ranges and subranges between the above values. In some embodiments, the thickness of the tempered glass is preferably 0.1 to 1.5 mm, more preferably 0.3 to 1.3 mm, even more preferably 0.5 to 1.2 mm, and even more preferably 0.8 mm, 0.9 mm, 1.0 mm, or 1.1 mm.

[0114] Due to the aforementioned superior properties, the glass composition and tempered glass of this invention can be used to manufacture protective cover glass, as well as various window materials. Furthermore, the glass composition and tempered glass of this invention can also be used to manufacture packaging carriers (substrate materials, semiconductor substrates) for semiconductor processes, glass substrates, and advanced semiconductor packaging.

[0115] The glass composition and tempered glass of the present invention can be used to manufacture various glass components, providing a variety of lenses, prisms, and other glass components with high optical value. Examples of lenses include concave meniscus lenses, convex meniscus lenses, biconvex lenses, biconcave lenses, plano-convex lenses, plano-concave lenses, and other lenses with spherical or aspherical lens surfaces.

[0116] The glass composition, tempered glass, and glass elements of this invention can be used to manufacture various devices (including instruments, equipment, etc.), such as mobile electronic devices (e.g., mobile phones, tablets, translators, readers, etc.), imaging equipment, sensors, microscopes, medical technology, digital projection, communications, optical communication technology / information transmission, optics / lighting in the automotive field, photolithography, excimer lasers, wafers, computer chips, and integrated circuits and electronic devices including such circuits and chips, or for use in automotive, surveillance, and security fields, including camera equipment and devices. [Method for manufacturing the glass composition and tempered glass]

[0117] The manufacturing method of the glass composition of the present invention is as follows: The glass composition 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 being prepared according to conventional methods, the prepared furnace charge is put into a melting furnace (such as a platinum or platinum alloy crucible) at 1250-1500°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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] The tempered glass of the present invention is obtained by chemical strengthening treatment of the glass composition of the present invention or the glass preform of the present invention.

[0122] The chemical strengthening treatment described in this invention includes immersing a glass composition or glass preform in a salt bath composed of molten sodium salt, potassium salt, or a mixture of sodium and potassium salts at a certain temperature (i.e., the chemical strengthening treatment temperature) for a certain period of time (i.e., the chemical strengthening treatment time).

[0123] The chemical strengthening treatment of the glass composition or glass preform of the present invention can employ a one-step strengthening method and a two-step strengthening method. The one-step strengthening method involves immersing the glass composition or glass preform in a salt bath composed of molten potassium salt and / or sodium salt at a certain temperature for a specific time. The two-step strengthening method involves first immersing the glass composition or glass preform in a salt bath composed of molten sodium salt or a sodium-containing mixed salt at a certain temperature for a specific time, and then immersing the glass composition or glass preform in a salt bath composed of molten potassium salt or a potassium-containing mixed salt at a certain temperature for a specific time.

[0124] In some embodiments, the chemical strengthening treatment of the glass composition of the present invention includes one-step chemical strengthening using a salt bath containing molten sodium salt (such as NaNO3). The salt bath can be pure molten sodium salt, or a mixed molten salt composed of molten sodium salt and molten potassium salt, or other known common salt bath components and salt bath additives. In these embodiments, Na ions replace Li ions in the glass composition, forming a compressive stress layer on the glass surface, thereby obtaining the strengthened glass of the present invention. In some embodiments, the chemical strengthening treatment temperature is preferably 350–500°C, more preferably 360–480°C, and even more preferably 370–470°C; the chemical strengthening treatment time is preferably 0.5–5 hours, more preferably 0.5–4 hours, and even more preferably 0.5–3 hours. In some embodiments, the chemical strengthening treatment temperature can be 350°C, 355°C, 360°C, 365°C, 370°C, 375°C, 380°C, 385°C, 390°C, 395°C, 400°C, 405°C, 410°C, 415°C, 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, etc., as well as all ranges and sub-ranges between the above values. In some embodiments, the chemical strengthening treatment time can be 0.5 hours, 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, etc., as well as all ranges and sub-ranges between the above values.

[0125] [Example]

[0126] To further illustrate and explain the technical solution of the present invention, the following non-limiting embodiments are provided.

[0127] <Examples of Glass Compositions>

[0128] In this embodiment, a glass composition having the composition shown in Tables 1 and 2 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 and 2.

[0129] Table 1.

[0130]

[0131]

[0132] Table 2.

[0133] Example (wt%) 7# 8# 9# 10# 11# 12# SiO2 58.0 57.5 54.2 55.4 52.8 57.2 B2O3 8.8 7.6 13.3 4.6 6.1 8.4 Al2O3 14.3 15.0 10.2 18.3 19.2 15.6 MgO 2.2 1.2 3.2 0.2 0.6 0.8 CaO 1.8 0.6 0 1.3 5.2 2.3 SrO 1.2 2.2 1.8 3.5 0.8 0.6 BaO 1.8 3.2 6.2 1.3 2.0 3.3 ZnO 0.8 0.5 1.4 3.2 2.2 0.5 ZrO2 0.6 0.7 2.2 1.6 0.6 1.3 <![CDATA[TiO2]]> 1.1 1.3 0 3.4 1.5 1.8 <![CDATA[La2O3]]> 1.6 2.2 3.2 0.6 0 2.0 <![CDATA[Y2O3]]> 2.8 1.5 1.3 3.3 4.5 1.0 <![CDATA[Gd2O3]]> 0 0 0.5 0 0 0 <![CDATA[Nb2O5]]> 0 0 0 0 0 0 <![CDATA[WO3]]> 0 0 0 0 0 0 <![CDATA[Ta2O5]]> 0 0 0 0 0 0 <![CDATA[GeO2]]> 0 0 0 0 0 0 <![CDATA[Li2O]]> 2.3 3.2 0.8 0.5 1.5 2.5 <![CDATA[Na2O]]> 2.1 2.3 1.3 1.6 1.2 2.0 <![CDATA[K2O]]> 0.6 1.0 0.3 1.1 1.5 0.7 <![CDATA[P2O5]]> 0 0 0 0 0.2 0 <![CDATA[Sb2O3]]> 0 0 0.1 0 0.1 0 <![CDATA[SnO2]]> 0 0 0 0 0 0 <![CDATA[CeO2]]> 0 0 0 0.1 0 0 total 100 100 100 100 100 100 <![CDATA[La2O3+Gd2O3+Y2O3]]> 4.4 3.7 5.0 3.9 4.5 3.0 <![CDATA[(La2O3+Y2O3) / (Li2O+Na2O+K2O)]]> 0.880 0.569 1.875 1.219 1.071 0.577 <![CDATA[SiO2 / (MgO+CaO+SrO+BaO)]]> 8.286 7.986 4.839 8.794 6.140 8.171 <![CDATA[(La2O3+Y2O3) / Al2O3]]> 0.308 0.247 0.441 0.213 0.234 0.192 <![CDATA[Al2O3 / (Na2O+K2O)]]> 5.296 4.545 6.375 6.778 7.111 5.778 <![CDATA[(CaO+BaO) / Al2O3]]> 0.252 0.253 0.608 0.142 0.375 0.359 <![CDATA[(Li2O+Na2O+K2O) / (ZrO2+TiO2)]]> 2.941 3.250 1.091 0.640 2.000 1.677 <![CDATA[Al2O3 / B2O3]]> 1.625 1.974 0.767 3.978 3.148 1.857 <![CDATA[SrO / Li2O]]> 0.522 0.688 2.250 7.000 0.533 0.240 <![CDATA[α 20 / 300℃ (10 -7 / K)]]> 57 58 53 63 58 56 <![CDATA[D W ]]> Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 <![CDATA[D A ]]> Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 E(GPa) 82 84 76 77 78 80 <![CDATA[T g (℃)]]> 536 535 542 524 525 531 <![CDATA[Density (g / cm 3 )]]> 2.40 2.41 2.48 2.50 2.51 2.41 Viscosity at 1400℃ (poise) 293 302 282 280 286 298

[0134] <Example of Tempered Glass>

[0135] This embodiment uses the above-described method for manufacturing tempered glass to obtain tempered glass with the compositions shown in Tables 3 and 4. Furthermore, the properties of each tempered glass were measured using the testing method described in this invention, and the measurement results are shown in Tables 3 and 4. In this embodiment, the thickness of the test sample for the four-point bending strength was 1.1 mm.

[0136] Table 3.

[0137] Example (wt%) 1# 2# 3# 4# 5# 6# <![CDATA[SiO2]]> 59.0 56.5 60.3 62.2 63.0 53.6 <![CDATA[B2O3]]> 8.4 9.2 6.8 6.5 5.6 12.8 <![CDATA[Al2O3]]> 14.5 13.6 12.6 14.6 18.1 11.5 MgO 1.3 1.6 1.5 0.5 0 0.5 CaO 2.1 2.5 2.2 1.3 0.3 4.3 SrO 1.2 0.7 1.5 0.3 0.2 3.2 BaO 2.5 2.1 2.2 4.2 5.3 5.8 ZnO 1.1 2.3 1.2 0.6 0.1 0 <![CDATA[ZrO2]]> 0.8 1.2 0.5 0.4 0.3 0 <![CDATA[TiO2]]> 1.2 2.2 1.0 0.8 0.3 0.4 <![CDATA[La2O3]]> 1.5 1.2 1.3 0.5 0.6 1.4 <![CDATA[Y2O3]]> 1.2 1.3 2.1 0.3 0.5 2.5 <![CDATA[Gd2O3]]> 0 0 0 0.1 0 0 <![CDATA[Nb2O5]]> 0 0 0 0 0 0.2 <![CDATA[WO3]]> 0 0 0 0 0 0 <![CDATA[Ta2O5]]> 0 0 0 0 0 0 <![CDATA[GeO2]]> 0 0 0 0 0 0 <![CDATA[Li2O]]> 2.1 2.6 2.2 6.2 1.2 0.7 <![CDATA[Na2O]]> 2.2 2.4 3.3 1.2 1.3 3.0 <![CDATA[K2O]]> 0.8 0.5 1.2 0.3 3.2 0 <![CDATA[P2O5]]> 0 0 0 0 0 0 <![CDATA[Sb2O3]]> 0.1 0 0 0 0 0 <![CDATA[SnO2]]> 0 0.1 0.1 0 0 0.1 <![CDATA[CeO2]]> 0 0 0 0 0 0 total 100 100 100 100 100 100 <![CDATA[La2O3+Gd2O3+Y2O3]]> 2.7 2.5 3.4 0.9 1.1 3.9 <![CDATA[(La2O3+Y2O3) / (Li2O+Na2O+K2O)]]> 0.529 0.455 0.507 0.104 0.193 1.054 <![CDATA[SiO2 / (MgO+CaO+SrO+BaO)]]> 8.310 8.188 8.149 9.873 10.862 3.884 <![CDATA[(La2O3+Y2O3) / Al2O3]]> 0.186 0.184 0.270 0.055 0.061 0.339 <![CDATA[Al2O3 / (Na2O+K2O)]]> 4.833 4.690 2.800 9.733 4.022 3.833 <![CDATA[(CaO+BaO) / Al2O3]]> 0.317 0.338 0.349 0.377 0.309 0.878 <![CDATA[(Li2O+Na2O+K2O) / (ZrO2+TiO2)]]> 2.550 1.618 4.467 6.417 9.500 9.250 <![CDATA[Al2O3 / B2O3]]> 1.726 1.478 1.853 2.246 3.232 0.898 <![CDATA[SrO / Li2O]]> 0.571 0.269 0.682 0.048 0.167 4.571 <![CDATA[α 20 / 300℃ (10 -7 / K)]]> 58 56 59 62 62 52 <![CDATA[D W ]]> Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 <![CDATA[D A ]]> Class 1 Class 1 Class 1 Category 2 Category 2 Class 1 E(GPa) 83 85 81 74 75 78 <![CDATA[T g (℃)]]> 533 530 532 523 520 545 <![CDATA[Density (g / cm 3 )]]> 2.38 2.42 2.39 2.53 2.40 2.43 Viscosity at 1400℃ (poise) 297 305 292 318 310 285 Ion exchange layer depth (μm) 62 64 68 57 54 52 Four-point bending strength (MPa) 753 752 760 722 728 685 Table 4.

[0138] Example (wt%) 7# 8# 9# 10# 11# 12# <![CDATA[SiO2]]> 58.0 57.5 54.2 55.4 52.8 57.2 <![CDATA[B2O3]]> 8.8 7.6 13.3 4.6 6.1 8.4 <![CDATA[Al2O3]]> 14.3 15.0 10.2 18.3 19.2 15.6 MgO 2.2 1.2 3.2 0.2 0.6 0.8 CaO 1.8 0.6 0 1.3 5.2 2.3 SrO 1.2 2.2 1.8 3.5 0.8 0.6 BaO 1.8 3.2 6.2 1.3 2.0 3.3 ZnO 0.8 0.5 1.4 3.2 2.2 0.5 <![CDATA[ZrO2]]> 0.6 0.7 2.2 1.6 0.6 1.3 <![CDATA[TiO2]]> 1.1 1.3 0 3.4 1.5 1.8 <![CDATA[La2O3]]> 1.6 2.2 3.2 0.6 0 2.0 <![CDATA[Y2O3]]> 2.8 1.5 1.3 3.3 4.5 1.0 <![CDATA[Gd2O3]]> 0 0 0.5 0 0 0 <![CDATA[Nb2O5]]> 0 0 0 0 0 0 <![CDATA[WO3]]> 0 0 0 0 0 0 <![CDATA[Ta2O5]]> 0 0 0 0 0 0 <![CDATA[GeO2]]> 0 0 0 0 0 0 <![CDATA[Li2O]]> 2.3 3.2 0.8 0.5 1.5 2.5 <![CDATA[Na2O]]> 2.1 2.3 1.3 1.6 1.2 2.0 <![CDATA[K2O]]> 0.6 1.0 0.3 1.1 1.5 0.7 <![CDATA[P2O5]]> 0 0 0 0 0.2 0 <![CDATA[Sb2O3]]> 0 0 0.1 0 0.1 0 <![CDATA[SnO2]]> 0 0 0 0 0 0 <![CDATA[CeO2]]> 0 0 0 0.1 0 0 total 100 100 100 100 100 100 <![CDATA[La2O3+Gd2O3+Y2O3]]> 4.4 3.7 5.0 3.9 4.5 3.0 <![CDATA[(La2O3+Y2O3) / (Li2O+Na2O+K2O)]]> 0.880 0.569 1.875 1.219 1.071 0.577 <![CDATA[SiO2 / (MgO+CaO+SrO+BaO)]]> 8.286 7.986 4.839 8.794 6.140 8.171 <![CDATA[(La2O3+Y2O3) / Al2O3]]> 0.308 0.247 0.441 0.213 0.234 0.192 <![CDATA[Al2O3 / (Na2O+K2O)]]> 5.296 4.545 6.375 6.778 7.111 5.778 <![CDATA[(CaO+BaO) / Al2O3]]> 0.252 0.253 0.608 0.142 0.375 0.359 <![CDATA[(Li2O+Na2O+K2O) / (ZrO2+TiO2)]]> 2.941 3.250 1.091 0.640 2.000 1.677 <![CDATA[Al2O3 / B2O3]]> 1.625 1.974 0.767 3.978 3.148 1.857 <![CDATA[SrO / Li2O]]> 0.522 0.688 2.250 7.000 0.533 0.240 <![CDATA[α 20 / 300℃ (10 -7 / K)]]> 57 58 53 63 58 56 <![CDATA[D W ]]> Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 <![CDATA[D A ]]> Class 1 Class 1 Class 1 Class 1 Class 1 Class 1 E(GPa) 82 84 76 77 78 80 <![CDATA[T g (℃)]]> 536 535 542 524 525 531 <![CDATA[Density (g / cm 3 )]]> 2.40 2.41 2.48 2.50 2.51 2.41 Viscosity at 1400℃ (poise) 293 302 282 280 286 298 Ion exchange layer depth (μm) 65 66 55 56 60 63 Four-point bending strength (MPa) 734 741 706 715 720 755

Claims

1. A glass composition, characterized in that, Its composition, expressed as a weight percentage, contains: SiO2: 52.5–66.0%; B2O3: 3.0–16.0%; Al2O3: 9.0–22.0%; SrO: greater than 0% but less than or equal to 5.0%; Li2O: greater than 0% but less than or equal to 8.0%; Na2O: greater than 0% but less than or equal to 7.0%, wherein the Al2O3 / B2O3 ratio is 0.7–5.

0.

2. The glass composition according to claim 1, characterized in that, Its components, expressed as a weight percentage, also include: La₂O₃: 0–5.0%; and / or Gd₂O₃: 0–5.0%; and / or Y₂O₃: 0–6.0%; and / or K₂O: 0–5.0%; and / or MgO: 0–5.0%; and / or CaO: 0–6.0%; and / or BaO: 0–7.0%; and / or ZnO: 0–6.0%; and / or ZrO₂:

0. ~3.0%; and / or TiO2: 0~5.0%; and / or Nb2O5: 0~3.0%; and / or WO3: 0~3.0%; and / or Ta2O5: 0~3.0%; and / or GeO2: 0~3.0%; and / or P2O5: 0~3.0%; and / or clarifying agent: 0~2.0%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

3. The glass composition according to claim 1 or 2, characterized in that, Its components are expressed as weight percentages, wherein: Al2O3 / B2O3 is 1.0–3.0, preferably 1.2–1.87; and / or Al2O3 / (Na2O+K2O) is 1.0–10.0, preferably 1.5–8.0, more preferably 2.0–6.0; and / or (CaO+BaO) / Al2O3 is 0.

0. The ratio of (CaO+BaO) / Al2O3 is 5 to 1.0, preferably 0.1 to 0.8, more preferably 0.2 to 0.6; and / or the ratio of SiO2 / (MgO+CaO+SrO+BaO) is 3.0 to 12.0, preferably 5.0 to 10.0, more preferably 6.5 to 8.

5.

4. The glass composition according to claim 1 or 2, characterized in that, Its components are expressed as weight percentages, wherein: La2O3+Gd2O3+Y2O3: greater than 0% but less than or equal to 10.0%, preferably La2O3+Gd2O3+Y2O3: 0.5-9.0%, more preferably La2O3+Gd2O3+Y2O3: 2.0-7.0%; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.05-3.5, preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.1-2.0, more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; and / or (La2O3+Y2O3) / Al2O3 is... 0.02–0.9, preferably (La2O3+Y2O3) / Al2O3 is 0.05–0.7, more preferably (La2O3+Y2O3) / Al2O3 is 0.1–0.5; and / or (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 0.5–10.0, preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.0–7.0, more preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.5–5.0; and / or SrO / Li2O is 0.02–10.0, preferably SrO / Li2O is 0.1–5.0, more preferably SrO / Li2O is 0.2–1.

0.

5. The glass composition according to claim 1 or 2, characterized in that, Its components, expressed as weight percentages, contain: SiO2: 54.0–64.0%, preferably SiO2: 56.0–62.0%; and / or B2O3: 6.0–15.0%, preferably B2O3: 8.0–13.0%; and / or Al2O3: 11.0–20.0%, preferably Al2O3: 13.0–18.0%; and / or SrO: greater than 0% but less than or equal to 4.0%, preferably SrO: 0.5–3.0%; and / or Li2O: 1.0–7.0%, preferably Li2O: 2.0–6.0%; and / or Na2 O: 1.0–6.0%, preferably Na₂O: 2.0–5.0%; and / or K₂O: 0–4.0%, preferably K₂O: 0.5–3.0%; and / or La₂O₃: 0.5–4.0%, preferably La₂O₃: 1.0–3.0%; and / or Gd₂O₃: 0–3.0%, preferably Gd₂O₃: 0–1.0%; and / or Y₂O₃: 0.5–5.0%, preferably Y₂O₃: 1.0–4.5%; and / or MgO: 0–4.0%, preferably MgO: 1.0–3.0%; and / or CaO: 1.0–5.0%. Preferred CaO: 2.0–4.0%; and / or BaO: 1.0–6.0%, preferably BaO: 2.0–5.0%; and / or ZnO: 0.5–6.0%, preferably ZnO: 1.0–5.0%; and / or ZrO2: 0–2.5%, preferably ZrO2: 0.5–2.0%; and / or TiO2: 0.5–4.0%, preferably TiO2: 1.0–3.0%; and / or Nb2O5: 0–2.0%, preferably Nb2O5: 0–1.0%, more preferably without Nb2O5; and / or WO3: 0–2.0%, preferably... WO3: 0-1.0%, more preferably WO3-free; and / or Ta2O5: 0-2.0%, preferably Ta2O5: 0-1.0%, more preferably Ta2O5-free; and / or GeO2: 0-2.0%, preferably GeO2: 0-1.0%, more preferably GeO2-free; and / or P2O5: 0-2.0%, preferably P2O5: 0-1.0%, more preferably P2O5-free; and / or clarifying agent: 0-1.0%, preferably 0-0.5%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

6. The glass composition according to claim 1 or 2, characterized in that, The coefficient of thermal expansion of the glass composition is α 20 / 300℃ 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K; and / or water resistance stability D W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of class 2 or more, preferably class 1; and / or Young's modulus E is 72 GPa or more, preferably 74 GPa or more, more preferably 76 GPa or more, and even more preferably 78 GPa or more; and / or transition temperature T g The temperature is 500–570°C, preferably 510–550°C, more preferably 525–540°C; and / or the density ρ is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 The viscosity at a high temperature of 1400°C is 270–340 poise, preferably 280–320 poise, and more preferably 285–310 poise.

7. Tempered glass, characterized in that, Its composition, expressed as a weight percentage, contains: SiO2: 52.5–66.0%; B2O3: 3.0–16.0%; Al2O3: 9.0–22.0%; SrO: greater than 0% but less than or equal to 5.0%; Li2O: greater than 0% but less than or equal to 8.0%; Na2O: greater than 0% but less than or equal to 7.0%, wherein the Al2O3 / B2O3 ratio is 0.7–5.

0.

8. The tempered glass according to claim 7, characterized in that, Its components, expressed as a weight percentage, also include: La₂O₃: 0–5.0%; and / or Gd₂O₃: 0–5.0%; and / or Y₂O₃: 0–6.0%; and / or K₂O: 0–5.0%; and / or MgO: 0–5.0%; and / or CaO: 0–6.0%; and / or BaO: 0–7.0%; and / or ZnO: 0–6.0%; and / or ZrO₂:

0. ~3.0%; and / or TiO2: 0~5.0%; and / or Nb2O5: 0~3.0%; and / or WO3: 0~3.0%; and / or Ta2O5: 0~3.0%; and / or GeO2: 0~3.0%; and / or P2O5: 0~3.0%; and / or clarifying agent: 0~2.0%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

9. The tempered glass according to claim 7 or 8, characterized in that, Its components are expressed as weight percentages, wherein: Al2O3 / B2O3 is 1.0–3.0, preferably 1.2–1.87; and / or Al2O3 / (Na2O+K2O) is 1.0–10.0, preferably 1.5–8.0, more preferably 2.0–6.0; and / or (CaO+BaO) / Al2O3 is 0.

0. The ratio of (CaO+BaO) / Al2O3 is 5 to 1.0, preferably 0.1 to 0.8, more preferably 0.2 to 0.6; and / or the ratio of SiO2 / (MgO+CaO+SrO+BaO) is 3.0 to 12.0, preferably 5.0 to 10.0, more preferably 6.5 to 8.

5.

10. The tempered glass according to claim 7 or 8, characterized in that, Its components are expressed as weight percentages, wherein: La2O3+Gd2O3+Y2O3: greater than 0% but less than or equal to 10.0%, preferably La2O3+Gd2O3+Y2O3: 0.5-9.0%, more preferably La2O3+Gd2O3+Y2O3: 2.0-7.0%; and / or (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.05-3.5, preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.1-2.0, more preferably (La2O3+Y2O3) / (Li2O+Na2O+K2O) is 0.2-1.0; and / or (La2O3+Y2O3) / Al2O3 is... 0.02–0.9, preferably (La2O3+Y2O3) / Al2O3 is 0.05–0.7, more preferably (La2O3+Y2O3) / Al2O3 is 0.1–0.5; and / or (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 0.5–10.0, preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.0–7.0, more preferably (Li2O+Na2O+K2O) / (ZrO2+TiO2) is 1.5–5.0; and / or SrO / Li2O is 0.02–10.0, preferably SrO / Li2O is 0.1–5.0, more preferably SrO / Li2O is 0.2–1.

0.

11. The tempered glass according to claim 7 or 8, characterized in that, Its components, expressed as weight percentages, contain: SiO2: 54.0–64.0%, preferably SiO2: 56.0–62.0%; and / or B2O3: 6.0–15.0%, preferably B2O3: 8.0–13.0%; and / or Al2O3: 11.0–20.0%, preferably Al2O3: 13.0–18.0%; and / or SrO: greater than 0% but less than or equal to 4.0%, preferably SrO: 0.5–3.0%; and / or Li2O: 1.0–7.0%, preferably Li2O: 2.0–6.0%; and / or Na2 O: 1.0–6.0%, preferably Na₂O: 2.0–5.0%; and / or K₂O: 0–4.0%, preferably K₂O: 0.5–3.0%; and / or La₂O₃: 0.5–4.0%, preferably La₂O₃: 1.0–3.0%; and / or Gd₂O₃: 0–3.0%, preferably Gd₂O₃: 0–1.0%; and / or Y₂O₃: 0.5–5.0%, preferably Y₂O₃: 1.0–4.5%; and / or MgO: 0–4.0%, preferably MgO: 1.0–3.0%; and / or CaO: 1.0–5.0%. Preferred CaO: 2.0–4.0%; and / or BaO: 1.0–6.0%, preferably BaO: 2.0–5.0%; and / or ZnO: 0.5–6.0%, preferably ZnO: 1.0–5.0%; and / or ZrO2: 0–2.5%, preferably ZrO2: 0.5–2.0%; and / or TiO2: 0.5–4.0%, preferably TiO2: 1.0–3.0%; and / or Nb2O5: 0–2.0%, preferably Nb2O5: 0–1.0%, more preferably without Nb2O5; and / or WO3: 0–2.0%, preferably... WO3: 0-1.0%, more preferably WO3-free; and / or Ta2O5: 0-2.0%, preferably Ta2O5: 0-1.0%, more preferably Ta2O5-free; and / or GeO2: 0-2.0%, preferably GeO2: 0-1.0%, more preferably GeO2-free; and / or P2O5: 0-2.0%, preferably P2O5: 0-1.0%, more preferably P2O5-free; and / or clarifying agent: 0-1.0%, preferably 0-0.5%, wherein the clarifying agent is one or more of Sb2O3, SnO2, and CeO2.

12. The tempered glass according to claim 7 or 8, characterized in that, The coefficient of thermal expansion of the tempered glass is α 20 / 300℃ 50×10 -7 / K~65×10 -7 / K, preferably 52×10 -7 / K~62×10 -7 / K, more preferably 55×10 -7 / K~60×10 -7 / K; and / or water resistance stability D W It is classified as Class 2 or above, preferably Class 1; and / or acid resistance stability D A It is of class 2 or more, preferably class 1; and / or Young's modulus E is 72 GPa or more, preferably 74 GPa or more, more preferably 76 GPa or more, and even more preferably 78 GPa or more; and / or transition temperature T g The temperature is 500–570°C, preferably 510–550°C, more preferably 525–540°C; and / or the density ρ is 2.70 g / cm³. 3 The preferred value is 2.60 g / cm³. 3 The following is more preferably 2.50 g / cm³. 3 The following are provided: and / or the high-temperature viscosity at 1400°C is 270–340 poise, preferably 280–320 poise, more preferably 285–310 poise; and / or the ion exchange layer depth is 40 μm or more, preferably 50 μm or more, more preferably 60 μm or more.

13. The tempered glass according to claim 7 or 8, characterized in that, The four-point bending strength of tempered glass with a thickness of 1.5 mm or less is 500 MPa or more, preferably 600 MPa or more, more preferably 700 MPa or more, and even more preferably 720 MPa or more.

14. The tempered glass according to claim 13, characterized in that, The thickness of the tempered glass is 0.1 to 1.5 mm, preferably 0.3 to 1.3 mm, more preferably 0.5 to 1.2 mm, and even more preferably 0.8 mm, 0.9 mm, 1.0 mm, or 1.1 mm.

15. A glass element, characterized in that, It is made using the glass composition according to any one of claims 1 to 6, or using the tempered glass according to any one of claims 7 to 14.

16. An apparatus, characterized in that, It contains a glass composition according to any one of claims 1 to 6, or a tempered glass according to any one of claims 7 to 14, or a glass element according to claim 15.

Images