Method for producing silica-alumina fiber
US5575964A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 18, 1994 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Aug 18, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/62245
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Silica-alumina fibers having good mechanical strength and heat resistance are produced by mixing a polyaluminoxane which comprises repeating units of the formula: ##STR1## in which X is an alkyl group, an alkoxy group or a hydroxy group, a silicon-containing compound in an amount of not larger than 40% by weight in terms of silica based on the weight of silica-alumina fibers to be produced, and an aliphatic carboxylic acid having 2 to 14 carbon atoms in an alkyl group in an amount of 0.03 to 0.4 mole per one gram atom of aluminum to obtain a spinning liquid, spinning the spinning liquid under a condition that a content of nonvolatile materials in the solution is maintained at least 97% by weight to form precursor fibers, and calcining the precursor fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.