Abstract: The laminate of the present disclosure is a laminate including multiple glass ceramic layers each containing quartz and a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal. An Al2O3 content of a surface layer portion of the laminate is higher than an Al2O3 content of an inner layer portion of the laminate, and a M2O content of the surface layer portion is lower than a M2O content of the inner layer portion.

Abstract: The laminate of the present disclosure includes multiple glass ceramic layers each containing quartz and a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal. The B concentration of a surface layer portion of the laminate is lower than the B concentration of an inner layer portion of the laminate.

Abstract: A glass ceramic material that contains: glass containing SiO2, B2O3, and M2O, where M is an alkali metal; filler containing quartz; and at least one metal oxide selected from MnO, NiO, CuO, and ZnO, wherein an amount of the metal oxide is 0.05 parts by weight to 2 parts by weight relative to a total 100 parts by weight of the glass and the filler.

Abstract: The glass ceramic material of the present disclosure contains a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal, and a filler that contains quartz, Al2O3, and ZrO2. The glass ceramic material contains the glass in an amount of 57.4% by weight or more and 67.4% by weight or less, the quartz in the filler in an amount of 29% by weight or more and 39% by weight or less, the Al2O3 in the filler in an amount of 1.8% by weight or more and 5% by weight or less, and the ZrO2 in the filler in an amount of 0.3% by weight or more and 1.8% by weight or less.

Abstract: The glass ceramic material of the present disclosure contains a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal, and a filler that contains quartz, Al2O3, and ZrO2. The glass ceramic material contains the glass in an amount of 57.4% by weight or more and 67.4% by weight or less, the quartz in the filler in an amount of 29% by weight or more and 39% by weight or less, the Al2O3 in the filler in an amount of 1.8% by weight or more and 5% by weight or less, and the ZrO2 in the filler in an amount of 0.3% by weight or more and 1.8% by weight or less.

Abstract: The laminate of the present disclosure is a laminate including multiple glass ceramic layers each containing quartz and a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal. An Al2O3 content of a surface layer portion of the laminate is higher than an Al2O3 content of an inner layer portion of the laminate, and a M2O content of the surface layer portion is lower than a M2O content of the inner layer portion.

Abstract: The laminate of the present disclosure includes multiple glass ceramic layers each containing quartz and a glass that contains SiO2, B2O3, Al2O3, and M2O, where M is an alkali metal. The B concentration of a surface layer portion of the laminate is lower than the B concentration of an inner layer portion of the laminate.

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 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: 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 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: Provided is a glass composition suitable for production using large-scale sheet glass mass production facilities by the float process or the like, having high heat resistance, and suitable for chemical strengthening. Specifically, provided is a glass composition containing, in mass %: 60 to 66% SiO2; 10 to 16% Al2O3; 0 to 1% B2O3; 3 to 10% MgO; 0 to 1% CaO; 1 to 9% SrO; O to 4% BaO; 0 to 2% ZnO; 0 to 1% Li2O; 10 to 20% Na2O; 0 to 5% K2O; O to 2% TiO2; 0 to 0.1% ZrO2; and 0 to 2% total iron oxide in terms of Fe2O3. In this glass composition, a total content of MgO, CaO, SrO, and BaO is in a range of 10 to 20%, a total content of Li2O, Na2O, and K2O is in a range of 14 to 20%, and a content of SrO is higher than a content of CaO.

Abstract: The present invention provides a glass composition in which a smaller amount of arsenic oxide or antimony oxide that has a heavy burden on the environment is used and fewer bubbles remain. This glass composition includes, in terms of mass %: 40 to 70% of SiO2, 5 to 20% of B2O3, 10 to 25% of Al2O3, 0 to 5% of MgO (up to and not including 5%), 0 to 20% of CaO, 0 to 20% of SrO, 0 to 10% of BaO, 0 to 1.5% of Li2O, 0 to 1.5% of Na2O, 0 to 1.5% of K2O, and 0 to 1.5% of Cl. The sum of the contents of Li2O, Na2O, and K2O is 0.05 to 1.5 mass %, and the content of K2O is equal to or larger than that of Na2O.