Alkali-containing aluminum borosilicate glass and utilization thereof

摘要

Aluminoborosilicate glass contains (in wt.%): more than 55-70 SiO2, 1-8 B2O3, 10-18 Al2O3, more than 1-5 Na2O, 0-4 K2O, more than 1-5 Na2O + K2O, 0-5 MgO, 3- less than 8 CaO, 0.1-8 SrO, 4.5-12 BaO, 10-25 MgO + CaO + SrO + BaO, 0-1.5 SnO2, 0-3 ZrO2, 0-2 TiO2 and 0-2 ZnO.