Patent ID: 6069100
Filing Date: 2000-05-30
Classification: C03C,H01J,H01K

Abstract:
An aluminosilicate glass composition containing alkaline earth metals, said glass composition being for lamp bulbs which have molybdenum components with bulb temperatures of greater than 650.degree. C., said glass composition comprising in percent by weight on oxide basis:SiO.sub.2 >58-62Al.sub.2 O.sub.3 15-17.5B.sub.2 O.sub.3 0.2-0.7CaO 5.5-14SrO 0-8BaO 6-10ZrO.sub.2 0.05-1CeO.sub.2 0-0.3TiO.sub.2 0-0.5Br.sup.- 0-0.6where.SIGMA. RO 21-24(CaO+SrO)/BaO 1.45-1.75and an alkali metal oxide content of <0.03% by weight and a water content of <0.02% by weight.