Synthetic silica glass powder
US5604163A · kind A · utility
9Cited by
7References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 10, 1995 |
| Grant date | Feb 18, 1997 |
| Priority date | — |
| Expiry date | Jul 10, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2203/26
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A synthetic silica glass powder obtained by calcining a silica gel powder obtained by hydrolysis of a tetraalkoxysilane, said synthetic silica glass powder containing from 1.times.10.sup.-1 to 1.times.10.sup.-4 ppm of boron and having an internal silanol group concentration of at most 150 ppm and an isolated silanol group concentration of at most 5 ppm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.