ALKALINE-EARTH ALUMINOBOROSILICATE GLASS AND THE USES THEREOF

摘要

The invention relates to low-alkali or alkali-free alkaline-earth aluminoborosilicate glasses of the following composition (in wt.- % on an oxide basis) SiO2 49 - 65; B2O3 0.5 - 4.5; Al2O3 10 - 23; MgO 2.7 - 7; CaO 0.5 - 10; SrO 15 - 22; BaO 0.5 - 7; provided that MgO + CaO + SrO + BaO 20 - 35; SnO2 0 - 2; ZrO2 0 - 2; TiO2 0 - 2; CeO2 0 - 1.5; ZnO 0 - 1; Na2O 0 - 2; K2O 0 - 2; provided that Na2O + K2O equals 0 - 3. The inventive glasses are especially suitable for use as substrates in thin film photovoltaic technology and as glasses for bulbs.