Method of making sol-gel monoliths
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United States of America Patent
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Dec 31, 1991
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N/A
app pub date -
Aug 1, 1990
filing date -
Aug 1, 1990
priority date (Note) -
Expired
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Abstract
A method of making a sol-gel monolith, comprising the steps of: (a) hydrolyzing and polycondensing one or more oxide precursors to form a sol comprising a plurality of oxide particles suspended in a liquid; (b) casting said sol into a mold; (c) gelling said sol by cross-linking said oxide particles to form a gel; (d) aging said gel to form an aged gel; (e) subjecting said aged gel to a drying treatment comprising the steps of: (i) heating said aged gel in a high humidity environment; and then (ii) heating said aged gel in a low humidity environment to remove liquid from the pores of the aged gel to form a dried, aged gel; and (f) densifying said dried, aged gel to form a sol-gel monolith.
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