| 摘要 |
<p>[Problem] To provide a glass composition which has excellent heat resistance and excellent ion exchange ability and is capable of providing high strength through a chemical strengthening treatment by means of ion exchange. [Solution] A glass composition of the present invention contains, in mass%, 53-62% of SiO2, 11-17% of Al2O3, 0-5% of Li2O, 10-15% of Na2O, 3-9% of K2O, 0-4% of MgO, 0-4% of CaO, 0-6% of SrO, 0-5% of BaO, 1-4% of ZrO2 and 2-6% of TiO2.</p> |
