Glass-ceramic composition for hermetic seals

Patent · Mon Jan 01 00:00:00 EST 1979

OSTI ID:863269

Ballard, Jr., Clifford P. ^[1]

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1. (Albuquerque, NM)

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 (United States)
• 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

Related Subjects

glass-ceramic
composition
hermetic
seals
relates
fracture
strength
adaptable
hermetically
sealing
chromium
bearing
iron
nickel
base
alloys
temperatures
950
degree
1100
form
sealed
insulator
comprising
55
65
weight
percent
sio
11
25
32
bao
coo
nickel base
hermetically sealing
base alloy
base alloys
ceramic composition
hermetically sealed
weight percent
hermetic seal
fracture strength
glass-ceramic composition
sealed insulator
hermetic seals
hermetically seal
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