Glass-ceramic seals for ceramic membrane chemical reactor application
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United States of America Patent
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Jun 11, 2002
Grant Date -
N/A
app pub date -
Sep 20, 1999
filing date -
Apr 16, 1999
priority date (Note) -
Expired
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Abstract
Glass-ceramic sealants for ceramic membrane reactors, ceramic membrane sealed to holders or substrates and methods of making seals between two ceramic materials or between a ceramic and a metal or metal alloy are provided. These sealants combine silicate glass-ceramic materials with selected metal oxides and, optionally, materials similar or identical to the materials being sealed, and employ thermal processing so that the resultant materials will have a thermal expansion coefficient that substantially matches the thermal expansion coefficients of the two materials. Surfaces of the ceramic sealant that are exposed to reactive atmospheres can be protected by providing a metal or metallic alloy layer over the ceramic seal.
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