Method for rapid production of large sol-gel SiO.sub.2 containing monoliths of silica with and without transition metals
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United States of America Patent
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Mar 23, 1993
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app pub date -
Aug 16, 1990
filing date -
Feb 25, 1985
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Abstract
A process for producing sol-gel monoliths containing SiO.sub.2 by mixing water, a SiO.sub.2 precursor and ketomalonic acid to form a sol, gelling the sol, aging the gelled sol and drying the aged gelled sol. Optional additional ingredients that may be added in the mixing step include salts of non-precipitating transition metals such as copper and/or additional precursors such as precursors for B.sub.2 O.sub.3, Na.sub.2 O, Li.sub.2 O, TiO.sub.2, Al.sub.2 O.sub.3 or mixtures thereof.
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