Glass-ceramic composition for hermetic seals

Patent · Sun Dec 31 23:00:00 EST 1978

OSTI ID:863269

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.degree. C to about 1100.degree. 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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• DOE Contract Number: AT(29-1)-789
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4135936
• OSTI ID: 863269
• Country of Publication: United States
• Language: English

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