Patent ID: 6074969
Filing Date: 2000-06-13
Classification: C03C,H01J,H01K

Abstract:
An aluminoborosilicate glass containing alkaline earth metals for lamp bulbs which have molybdenum components and with bulb temperatures of at most 650.degree. C., said glass comprising in percent by weight on oxide basis: SiO.sub.2 59-61 Al.sub.2 O.sub.3 13.5-15.5 B.sub.2 O.sub.3 3-5.5 MgO 2.3-5 CaO 8.2-10.5 BaO 8.5-9.5 CeO.sub.2 0.03-0.3 where (MgO + CaO)/BaO <1.60 CaO/MgO <4.20  and an alkali metal oxide content of <0.08% by weight and a water content of .ltoreq.0.02% by weight.