Glass ceramic seals to inconel

Patent · Tue Nov 08 00:00:00 EST 1983

OSTI ID:864778

McCollister, Howard L ^[1]; Reed, Scott T ^[1]

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1. Albuquerque, NM

A glass ceramic composition prepared by subjecting a glass composition comprising, by weight, 65-80% SiO.sub.2, 8-16%, Li.sub.2 O, 2-8% , Al.sub.2 O.sub.3, 1-8% K.sub.2 O, 1-5% P.sub.2 O.sub.5 and 1.5-7% B.sub.2 O.sub.3, to the following processing steps of heating the glass composition to a temperature sufficient to crystallize lithium metasilicate therein, holding the glass composition at a temperature and for a time period sufficient to dissolve the lithium metasilicate therein thereby creating cristobalite nucleii, cooling the glass composition and maintaining the composition at a temperature and for a time period sufficient to recrystallize lithium metasilicate therein, and thermally treating the glass composition at a temperature and for a time period sufficient to cause growth of cristobalite and further crystallization of lithium metasilicate producing a glass ceramic composition having a specific thermal expansion coefficient and products containing said composition.

• Research Organization: AT&T
• DOE Contract Number: AC04-67DP00789
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4414282
• Application Number: 06/369,965
• OSTI ID: 864778
• Country of Publication: United States
• Language: English

Related Subjects

glass
ceramic
seals
inconel
composition
prepared
subjecting
comprising
weight
65-80
sio
8-16
2-8
1-8
1-5
5-7
following
processing
steps
heating
temperature
sufficient
crystallize
lithium
metasilicate
therein
holding
time
period
dissolve
creating
cristobalite
nucleii
cooling
maintaining
recrystallize
thermally
treating
growth
crystallization
producing
specific
thermal
expansion
coefficient
products
containing
ceramic seals
products containing
glass ceramic
expansion coefficient
period sufficient
ceramic composition
composition comprising
thermal expansion
time period
temperature sufficient
glass composition
processing steps
thermally treating
processing step
ceramic seal
/428/65/501/