Alkali-free glass and method of producing the same

摘要

An alkali-free glass essentially consists of, by weight percent, 40-70% SiO2, 6-25% Al2O3, 5-20% B2O3, 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, 0-10% ZnO, 0.05-2% SnO2, and 0.005-1% Cl2, and substantially contains no alkali metal oxide.