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Title: Glass ceramic-to-metal seals

Abstract

A glass ceramic composition prepared by subjecting a glass composition comprising, by weight, 65 to 80% SiO/sub 2/, 8 to 16% Li/sub 2/O, 2 to 8% Al/sub 2/O/sub 3/, 1 to 8% K/sub 2/O, 1 to 5% P/sub 2/O/sub 5/ and 1.5 to 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 caus 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.

Publication Date:
OSTI Identifier:
6463797
Application Number:
ON: DE83006895
Assignee:
SNL; ERA-08-018287; EDB-83-050746
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; GLASS; SEALING MATERIALS; NICKEL BASE ALLOYS; CERAMICS; CRISTOBALITE; CRYSTALLIZATION; LITHIUM SILICATES; SEALS; THERMAL EXPANSION; ALKALI METAL COMPOUNDS; ALLOYS; CHALCOGENIDES; EXPANSION; LITHIUM COMPOUNDS; MATERIALS; MINERALS; NICKEL ALLOYS; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; PHASE TRANSFORMATIONS; SILICATES; SILICON COMPOUNDS; SILICON OXIDES; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360101 - Metals & Alloys- Preparation & Fabrication

Citation Formats

Not Available. Glass ceramic-to-metal seals. United States: N. p., 1982. Web.
Not Available. Glass ceramic-to-metal seals. United States.
Not Available. Mon . "Glass ceramic-to-metal seals". United States.
@article{osti_6463797,
title = {Glass ceramic-to-metal seals},
author = {Not Available},
abstractNote = {A glass ceramic composition prepared by subjecting a glass composition comprising, by weight, 65 to 80% SiO/sub 2/, 8 to 16% Li/sub 2/O, 2 to 8% Al/sub 2/O/sub 3/, 1 to 8% K/sub 2/O, 1 to 5% P/sub 2/O/sub 5/ and 1.5 to 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 caus 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {4}
}