| 摘要 |
<p>Provided is a glass composition suitable for production using large-scale sheet glass mass production facilities by the float process or the like, having high heat resistance, and suitable for chemical strengthening. Specifically, provided is a glass composition containing, in mass%: 60 to 66% SiO 2 ; 10 to 16% Al 2 O 3 ; 0 to 1% B 2 O 3 ; 3 to 10% MgO; 0 to 1% CaO; 1 to 9% SrO; 0 to 4% BaO; 0 to 2% ZnO; 0 to 1% Li 2 O; 10 to 20% Na 2 O; 0 to 5% K 2 O; 0 to 2% TiO 2 ; 0 to 0.1% ZrO 2 ; and 0 to 2% total iron oxide in terms of Fe 2 O 3 . In this glass composition, a total content of MgO, CaO, SrO, and BaO is in a range of 10 to 20%, a total content of Li 2 O, Na 2 O, and K 2 O is in a range of 14 to 20%, and a content of SrO is higher than a content of CaO.</p> |
