| 摘要 |
<p>This tempered glass has a compressive stress layer on the surface and is characterized by containing, as the glass composition and in mol %, 50 to 75% of SiO2, 3 to 13% of Al2O3, 0 to 1.5% of B2O3, 0 to 4% of Li2O, 7 to 20% of Na2O, 0.5 to 10% of K2O, 0.5 to 13% of MgO, 0 to 6% of CaO, and 0 to 4.5% of SrO, and by substantially not containing As2O3, Sb2O3, PbO, and F.</p> |
