| 摘要 |
This glass comprises, in mole percent on an oxide basis, 60-68% of SiO2, 8-12% of Al2O3, 12-20% of Na2O, 0.1-6% of K2O, 6.4-12.5% of MgO, and 0.001-4% of ZrO2, with the total content of B2O3, P2O5, CaO, SrO, and BaO being 0-1%, and the glass satisfies 2×Al2O3/SiO2≤0.4 and 0<K2O/Na2O≤0.3. This glass is capable of achieving high surface compressive stress by chemical strengthening, is capable of achieving high surface compressive stress even when deteriorated salt is used for chemical strengthening treatment thereof due to suppressed percentage reductions in the surface compressive stress, has a high rate of ionic exchange during chemical strengthening, and has excellent manufacturability. |
