Abstract: Provided is a glass composition including the following components in mass %: 45?SiO2?80; 10?B2O3?40; 0.1?Al2O3?20; 0.1?(MgO+CaO)?10; 0?(Li2O+Na2O+K2O)?5; and 0.1?T-SnO2?2, where T-SnO2 represents total tin oxide calculated as SnO2, wherein 0?MgO/(MgO+CaO)?0.50 is satisfied on a mass basis. This glass composition is suitable for stably manufacturing a low-permittivity glass fiber.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a glass composition for chemical strengthening, the glass composition having a high alkali resistance and being suitable for achieving both the surface compressive stress and the compressive stress layer depth. The glass composition according to the present disclosure includes, as components, in mol %: 60 to 80% SiO2; 1 to 5% Al2O3; 5 to 25% MgO; 0 to 5% CaO; 10 to 20% Na2O; and 0 to 10% K2O. A chemically strengthened glass article, for example, having a surface compressive stress of 650 to 950 MPa and a compressive stress layer depth of 7 to 17 ?m can be provided using the glass composition.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O?Li2O+Na2O+K2O and RO?MgO+CaO+SrO.

Abstract: The present disclosure provides a glass composition which is for chemical strengthening, from which a glass sheet can be produced by a common float process, and which is suitable for achieving both a surface compressive stress and a compressive stress layer depth. The glass composition according to the present disclosure includes, as components, in mol %: 60 to 80% SiO2; 1 to 5% Al2O3; 5 to 25% MgO; 0 to 5% CaO; 10 to 20% Na2O; and 0 to 10% K2O. A chemically strengthened glass article, for example, having a surface compressive stress of 500 MPa or more and a compressive stress layer depth of 10 ?m or more can be provided using the glass composition.

Abstract: The present invention provides a glass composition having a low density and having a specific elastic modulus high enough to reduce deflection. The glass composition includes, as components, in mol %: 60 to 75% SiO2; 5 to 15% Al2O3; 0.5 to 5% MgO; 0.5 to 10% CaO; 5 to 20% Li2O; 2 to 10% Na2O; and 0 to 5% K2O, and has a density of 2.48 g/cm3 or less. The glass composition has a specific elastic modulus of, for example, 33.5×106 Nm/kg or more.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0?Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O?Li2O+Na2O+K2O and RO?MgO+CaO+SrO.

Abstract: The present disclosure provides a novel glass filler that has a low permittivity and is suitable for mass production. A glass filler provided includes a glass composition that includes, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass filler provided includes a glass composition that includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.

Abstract: The present invention provides a glass composition that allows holes with a circular contour and a smooth inner wall to be formed by a collective micro-hole-forming process using a combination of modified portion formation by ultraviolet laser irradiation and etching, the glass composition being adapted for practical continuous production. The present invention relates to a glass for laser processing, the glass including a metal oxide serving as a coloring component, the glass having a glass composition including, in mol %: 45.0%?SiO2?68.0%; 2.0%?B2O3?20.0%; 3.0%?Al2O3?20.0%; 0.1%?TiO2?5.0%; and 0%?ZnO?9.0%, wherein a relationship of 0?Li2O+Na2O+K2O<2.0% is satisfied.

Abstract: The present invention provides a glass composition that allows holes with a circular contour and a smooth inner wall to be formed by a collective micro-hole-forming process using a combination of modified portion formation by ultraviolet laser irradiation and etching, the glass composition being adapted for practical continuous production. The present invention relates to a glass for laser processing, the glass including a metal oxide serving as a coloring component, the glass having a glass composition including, in mol %: 45.0%?SiO2?68.0%; 2.0%?B2O3?20.0%; 3.0%?Al2O3?20.0%; 0.1%?TiO2?5.0%; and 0%?ZnO?9.0%, wherein a relationship of 0?Li2O+Na2O+K2O<2.0% is satisfied.

Abstract: Provided is a glass composition containing, in mol %: 56 to 66% SiO2; 6 to 12% Al2O3; 5 to 14% MgO; 0 to 1% CaO; 17 to 24% Na2O; and 0 to 3% K2O. The total content of Li2O, Na2O, and K2O is in a range of 18.5 to 24%. This glass composition is suitable for production by a float process and for introduction of a compressive stress layer with a high crack initiation load, a high surface compressive stress, and a large thickness by chemical strengthening.

Abstract: A glass composition of the present invention includes, in mol %, 66 to 72% SiO2, 1 to 4% Al2O3, 8 to 15% MgO, 1 to 8% CaO, 12 to 16% Na2O, and 0 to 1% K2O. A total content of MgO and CaO is in a range of 12 to 17%, and a molar ratio of CaO to the total content of MgO and CaO is in a range of 0.1 to 0.4. The glass composition of the present invention is suitable for production by the float process, and is suitable for chemical strengthening.

Abstract: Provided is a glass composition containing, in mass %: 58 to 64% SiO2; 8 to 12% Al2O3; 6 to 10% MgO; 0 to 1% CaO; 18 to 24% Na2O; 0 to 3% K2O; 0 to 2% TiO2; and 0 to 3% ZrO2. The total content of MgO, CaO, SrO, and BaO is in a range of 7 to 12%. This glass composition is suitable for production by a float process and for chemical strengthening.

Abstract: The present invention provides a glass composition containing, in mass %: 59.0 to 63.0% SiO2; 4.0 to 10.0% TiO2; 8.0 to 12.0% Al2O3; 1.0 to 5.0% MgO; 0 to 4.0% CaO; 4.0 to 14.0% SrO; 4.0 to 11.0% Na2O; and 0 to 1.0% K2O. According to the present invention, it is possible to provide a glass composition having excellent heat resistance, being suitable for production by the float process, and being suitable for chemical strengthening.

Abstract: The glass composition of the present invention contains, in mol %: 58% or more and less than 70% SiO2; 0 to 14% B2O3; 10 to 16% Al2O3; 0 to 12.5% MgO; 0 to 11% CaO; 0 to 3% SrO; 0 to 3% ZnO; 4.5 to 11% Li2O; 0 to 2% Na2O; 2 to 7% K2O; 0 to 0.8% TiO2; 0 to 0.5% ZrO2; and 0 to 0.2% SnO2. In this glass composition, the total content of Li2O, Na2O, and K2O is in a range of 6.5 to 13%. The glass composition of the present invention is suitable for production by a float process and is suitable for chemical strengthening. The glass composition of the present invention has a low thermal expansion coefficient. The glass composition of the present invention has properties suitable for use in glass substrates for displays.

Abstract: A glass composition of the present invention includes, in mol %, 66 to 72% SiO2, 1 to 4% Al2O3, 8 to 15% MgO, 1 to 8% CaO, 12 to 16% Na2O, and 0 to 1% K2O. A total content of MgO and CaO is in a range of 12 to 17%, and a molar ratio of CaO to the total content of MgO and CaO is in a range of 0.1 to 0.4. The glass composition of the present invention is suitable for production by the float process, and is suitable for chemical strengthening.

Abstract: The present invention provides a glass composition containing, in mass %: 59.0 to 63.0% SiO2; 4.0 to 10.0% TiO2; 8.0 to 12.0% Al2O3; 1.0 to 5.0% MgO; 0 to 4.0% CaO; 4.0 to 14.0% SrO; 4.0 to 11.0% Na2O; and 0 to 1.0% K2O. According to the present invention, it is possible to provide a glass composition having excellent heat resistance, being suitable for production by the float process, and being suitable for chemical strengthening.

Abstract: Provided is a glass composition containing, in mol %: 56 to 66% SiO2; 6 to 12% Al2O3; 5 to 14% MgO; 0 to 1% CaO; 17 to 24% Na2O; and 0 to 3% K2O. The total content of Li2O, Na2O, and K2O is in a range of 18.5 to 24%. This glass composition is suitable for production by a float process and for introduction of a compressive stress layer with a high crack initiation load, a high surface compressive stress, and a large thickness by chemical strengthening.