Glass-ceramic composition for hermetic seals

Patent · Mon Jan 22 23:00:00 EST 1979

OSTI ID:7125961

Ballard, Jr, C P

The invention relates to a glass-ceramic composition having a high fracture strength adaptable for hermetically sealing to chromium bearing iron or nickel base alloys at temperatures of between about 950 C to about 1100 C to form a hermetically sealed insulator body, comprising from about 55 to about 65 weight percent SiO[sub 2], from about 0 to about 5 weight percent Al[sub 2]O[sub 3], from about 6 to about 11 weight % Li[sub 2]O, from about 25 to about 32 weight percent BaO, from about 0.5 to about 1.0 weight percent CoO and from about 1.5 to about 3.5 weight percent P[sub 2]O[sub 5]. 2 figs.

• Assignee: Dept. of Energy, Washington, DC (United States)
• Patent Number(s): A; US 4135936
• Application Number: PPN: US 5-916398
• OSTI ID: 7125961
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420000* -- Engineering
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
COBALT COMPOUNDS
COBALT OXIDES
DESIGN
FRACTURE PROPERTIES
LITHIUM COMPOUNDS
LITHIUM OXIDES
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHOSPHORUS COMPOUNDS
PHOSPHORUS OXIDES
SEALS
SILICON COMPOUNDS
SILICON OXIDES
TRANSITION ELEMENT COMPOUNDS