Process For the Production of Monoliths by Means of the Invert Sol-Gel Process
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United States of America Patent
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Issued Date -
Sep 18, 2008
app pub date -
Feb 14, 2006
filing date -
Mar 9, 2005
priority date (Note) -
Abandoned
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Abstract
Process for the production of monoliths of glass by means of the sol-gel process, comprising the following steps: a) dispersion in water of an oxide prepared by the pyrogenic route, b) hydrolysis of an alkoxide in aqueous solution to form a hydrolysate, c) mixing of the hydrolysate of the alkoxide with the oxide prepared by the pyrogenic route to form a colloidal sol, d) optional removal of coarse contents from the colloidal sol, e) gelling of the colloidal sol in a mould, f) replacement of the water contained in the resulting aerogel by an organic solvent, g) drying of the aerogel, h) heat treatment of the dried aerogel.
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