CPC C03C 10/0027 (2013.01) [C03C 10/0009 (2013.01); C03C 10/0054 (2013.01); C03C 2204/00 (2013.01)] | 23 Claims |
1. A glass ceramic, comprising, by wt %: 60 to 80% of SiO2; 4 to 20% of Al2O3; more than 0 but less than or equal to 15% of Li2O; more than 0 but less than or equal to 12% of Na2O; 0 to 5% of K2O; more than 0 but less than or equal to 5% of ZrO2; 0 to 5% of P2O5; and 0 to 10% of TiO2; and
a crystalline phase containing LiAlSi4O10, quartz, and quartz solid solution,
wherein the quartz and the quartz solid solution crystalline phase account for 15 to 30% of the glass ceramic by wt %, the LiAlSi4O10 crystalline phase accounts for not greater than 15% of the glass ceramic by wt %, and
wherein a ratio of ZrO2/Li2O is more than 0 but less than or equal to 0.35.
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