Patent ID: 6096670
Filing Date: 2000-08-01
Classification: C03C

Abstract:
An alkali metal-free aluminoborosilicate glass, which has the following composition in % by weight based on oxide: SiO.sub.2 57-60 B.sub.2 O.sub.3 6.5-9.5 Al.sub.2 O.sub.3 14-17.5 MgO 5-8 CaO 1-4 SrO 5-8 BaO 0-3.5 with MgO + CaO + SrO + BaO 15-17 ZrO.sub.2 0.4-1.5 TiO.sub.2 0.4-1 CeO.sub.2 0.1-0.5 SnO.sub.2 0.2-1.