A glass composition suitable for manufacturing plasma displays and large-area displays using the fusion draw process is provided. The glass composition includes 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2.5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, 0
A glass composition suitable for manufacturing plasma displays and large-area displays using the fusion draw process is provided. The glass composition includes 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2.5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, 0.0-3.0 mol % BaO, and 0.0-5.0 mol % MgO+SrO+BaO.
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What is claimed is: 1. A glass composition comprising 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2. 5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, and 0.0-3.0 mol % BaO. 2. The glass composition of claim 1, wherein MgO+SrO+BaO are present in a total
What is claimed is: 1. A glass composition comprising 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2. 5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, and 0.0-3.0 mol % BaO. 2. The glass composition of claim 1, wherein MgO+SrO+BaO are present in a total amount of 0-5 mol %. 3. The glass composition of claim 2 having a liquidus temperature of 1100째 C. or less. 4. The glass composition of claim 2 having a viscosity at a liquidus temperature of at least 105 poise. 5. The glass composition of claim 2 having a viscosity at a liquidus temperature in excess of 4횞105 poise. 6. The glass composition of claim 2 having a linear coefficient of thermal expansion of 80 to 95횞1031 7/째 C. over a temperature range of 25 to 300째 C. 7. The glass composition of claim 6 having a linear coefficient of thermal expansion of 87 to 92횞10-7/째 C. over a temperature range of 25 to 300째 C. 8. The glass composition of claim 2 having a strain point greater than 580째 C. 9. The glass composition of claim 8 having a strain point of at least 640째 C. 10. The glass composition of claim 2 further comprising at least one oxide selected from the group consisting of B2O 3, P2O5, Li2O, Y2O3, La2O3, and ZnO in a total amount not exceeding 5 mol %. 11. The glass composition of claim 2 wherein a molar ratio of Na2O to K2O is approximately 1.0. 12. The glass composition of claim 2 wherein a molar ratio of Na2O to K2O is in a range from 1.2 to 3.0. 13. The glass composition of claim 2 comprising 60-65 mol % SiO2, 15.5-17.0 mol % Al2O3, 9.5-11.0 mol % Na2O, 3.5-5.5 mol % K2O, 3.5-8.0 mol % CaO, 0.0-2.0 mol % MgO, 0.0-2.0 mol % SrO, 0.0-2.0 mol % BaO, and 0.0-3.0 mol% MgO+SrO+BaO. 14. The glass composition of claim 2 further comprising at least one oxide selected from the group consisting of B2O 3, P2O5, Li2O, Y2O3, La2O3, and ZnO in a total amount not exceeding 3 mol %. 15. The glass composition of claim 2 having a strain point of at least 640째 C. and a linear coefficient of thermal expansion of 80 to 95횞10-7/째 C. over a temperature range of 25 to 300째 C. 16. The glass composition of claim 15 having a liquidus temperature of 1100째 C. or less. 17. The glass composition of claim 15 having a viscosity at a liquidus temperature of at least 105 poise. 18. The glass composition of claim 15 having a viscosity at a liquidus temperature in excess of 4횞105 poise. 19. The glass composition of claim 15, comprising 60-65 mol % SiO2, 15.5-17.0 mol % Al2O3, 9.5-11.0 mol % Na2O, 3.5-5.5 mol % K2O, 3.5-8.0 mol % CaO, 0.0-2.0 mol % MgO, 0.0-2.0 mol % SrO, 0.0-2.0 mol % BaO, and 0.0-3.0 mol % MgO+SrO+ BaO. 20. A glass substrate for an electronic display device, comprising: a flat, transparent glass exhibiting a strain point of at least 640째 C. and a linear coefficient of thermal expansion of 80 to 95횞10-7/째 C. over a temperature range of 25 to 300째 C., said glass having the glass composition of claim 2. 21. The glass composition of claim 1, comprising 60-65 mol % SiO2, 15.5-17.0 mol % Al2O3, 9.5-11.0 mol % Na2O, 3.5-5.5 mol % K2O, 3.5-8.0 mol % CaO, 0.0-2.0 mol % MgO, 0.0-2.0 mol % SrO, and 0.0-2.0 mol % BaO. 22. The glass composition of claim 21 wherein MgO+SrO+BaO are present in a total amount of 0-3 mol %. 23. A glass substrate for an electronic display device, comprising 59-66 mol % SiO2, 14.5-18.0 mol % Al2O 3, 8.5-12.0 mol % Na2O, 2.5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, 0.0-3.0 mol % BaO, and 0. 0-5.0 mol % MgO+SrO+BaO. 24. A method of producing a glass panel for an electronic device, comprising: melting a glass batch comprising 59-66 mol % SiO2, 14.5-18.0 mol % Al2O3, 8.5-12.0 mol % Na2O, 2. 5-6.5 mol % K2O, 2.5-9.0 mol % CaO, 0.0-3.0 mol % MgO, 0.0-3.0 mol % SrO, 0.0-3.0 mol % BaO, and 0.0-5.0 mol % MgO+SrO+BaO; and drawing a thin sheet of molten glass from the melt. 25. The method of claim 24, wherein the glass sheet is drawn by the fusion draw process.
Koyama Akihiro,JPX ; Kishimoto Shoichi,JPX ; Kurachi Junji,JPX ; Yamamoto Nobuyuki,JPX, Glass composition and substrate for information recording media comprising the same.
Maeda Kei (Yokohama JPX) Nakao Yasumasa (Yokohama JPX) Kushitani Hideki (Yokohama JPX) Ito Setsuro (Yokohama JPX), Glass composition for a substrate, and substrate for plasma display made thereof.
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