| 摘要 |
<p>An alkali-free glass substrate containing, by mass percent, 50 - 70 % of SiO2, 10 - 25% of Al2O3, 5 - 20 % of B2O3, 0 - 10 % of MgO, 0 - 15 % of CaO, 0 - 10 % of BaO, 0 - 10 % of SrO and 0 - 5 % of ZnO, also containing SnO2 and/or Sb2O3 and having a beta -OH value of at least 0.485/mm.</p> |
