Sealing members for alumina arc tubes and method of making the same
AssigneeGTE Products Corporation
InventorsWilliam H. Rhodes, Alfred E. Feuersanger, Rodrigue Thibodeau
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Abstract
Alumina arc tube sealing members including a highly pure, fine alumina doped with yttrium oxide, and magnesium oxide. The sealing members are used in the formation of sintered hermetic seals to a green, prefired, or fully sintered translucent alumina arc tube and niobium electrical feedthrough assemblies with or without the use of sealing frits or brazing alloys.
Claims3
An alumina arc tube sealing member comprising between about 95.0 to about 99.9 percent by weight of highly pure fine alumina doped with between greater than about 1.0 to about 5.0 percent by weight of yttrium oxide, and between about 0.02 to about 0.25 percent by weight of magnesium oxide, said sealing member being high-density, hermetically tight and having very little residual porosity.
Dependencies are inferred from the claim text.