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US 12,722,355 B2Granted
Silica wet gel and aerogel
AssigneeCardinal CG Company
InventorsReaz Ahmed Chowdhury, Mohammad Arifuzzaman, Kellen Kitzman, Kari B. Myli
Life of this patent
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Abstract
The invention provides silica wet gel, silica aerogel, and methods that can be used to form an enhanced silica aerogel sheet having fewer optical defects along with other desirable properties.
Claims17
A method of making silica wet gel comprising the steps of:
- preparing a first solution by mixing methyl silicate 51 and methanol, wherein the first solution consists essentially of the methyl silicate 51 and the methanol, and wherein the methyl silicate 51 has a weight percent of greater than or equal to 15% and less than or equal to 30% and the methanol has a weight percent of greater than or equal to 60% and less than or equal to 90%;
- preparing a second solution by mixing ammonium hydroxide and water, wherein the second solution consists essentially of the ammonium hydroxide and the water, and wherein the ammonium hydroxide has a weight percent of greater than or equal to 0.5% and less than or equal to 1% and the water has a weight percent of greater than or equal to 99% and less than 100%;
- mixing the first solution and the second solution together to form a precursor material;
- and
- allowing components in the precursor material to react to form silica wet gel.
2 more elements
A method of making a silica wet gel comprising the steps of:
- preparing a first solution by mixing methyl silicate 51 and methanol;
- preparing a second solution by mixing ammonium hydroxide and water;
- mixing the first solution and the second solution together to form a precursor material, such that the precursor material consists essentially of:
- methyl silicate 51 at a weight percent of greater than or equal to 15% and less than or equal to 24%;
- methanol at a weight percent of greater than or equal to 60% and less than or equal to 68%;
- water at a weight percent of greater than or equal to 15% and less than or equal to 17%;
- and
- ammonium hydroxide at a weight percent of greater than or equal to 0.08% and less than or equal to 0.2%;
- and
- allowing components in the precursor material to react to form the silica wet gel.
7 more elements
Dependencies are inferred from the claim text.