| 摘要 |
<p>Provided is a tempered glass having a compression stress layer in a surface thereof, comprising, as a glass composition in terms of mass%, 50 to 75% of SiO 2 , 5 to 20% of Al 2 O 3 , 0 to 8% of B 2 O 3 , 5 to 20% of Na 2 O, 0.1 to 10% of K 2 O, 0.1 to 15% of MgO, and 0.001 to 5% of SrO+BaO, and having a mass ratio (MgO+CaO+SrO+BaO) / (MgO+ZrO 2 ) of 0.3 to 1.5.</p> |
