Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 58 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of
Provided is an alkali-free glass, comprising, as a glass composition in terms of mass %, 58 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more than 725° C.
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1. An alkali-free glass, comprising, as a glass composition in terms of mass %, 62.5 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more t
1. An alkali-free glass, comprising, as a glass composition in terms of mass %, 62.5 to 70% of SiO2, 15.5 to 20% of Al2O3, 0 to 1% of B2O3, 0 to 5% of MgO, 3.5 to 16% of CaO, 0.5 to 6.5% of SrO, and 5 to 15% of BaO, being substantially free of alkali metal oxides, and having a strain point of more than 735° C. 2. The alkali-free glass according to claim 1, wherein the alkali-free glass is substantially free of B2O3. 3. The alkali-free glass according to claim 1, further comprising 0.001 to 1 mass % of SnO2 in the glass composition. 4. The alkali-free glass according to claim 1, wherein the alkali-free glass has a Young's modulus of more than 78 GPa. 5. The alkali-free glass according to claim 1, wherein the alkali-free glass has a Young's modulus/density of more than 29.5 GPa/g·cm−3. 6. The alkali-free glass according to claim 1, wherein the alkali-free glass has a liquidus temperature of less than 1250° C. 7. The alkali-free glass according to claim 1, wherein the alkali-free glass has a temperature at 102.5 poise of 1660° C. or less. 8. The alkali-free glass according to claim 1, wherein the alkali-free glass has a viscosity at a liquidus temperature of 104.8 poise or more. 9. The alkali-free glass according to claim 1, wherein the alkali-free glass is formed by an overflow down-draw method. 10. The alkali-free glass according to claim 1, wherein the alkali-free glass is used for an OLED display.
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이 특허에 인용된 특허 (8)
Fechner, Joerg; Ott, Franz, Crystallization-stable alumino-silicate glass, its manufacture and its uses.
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