Finely divided oxide and its manufacture
US4806333A · kind A · utility
6Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1986 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Oct 22, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/64
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A product suitable as a ceramic comprises substantially nonaggregated alumina particles with 95% by number having an aspect ratio (i.e., the ratio of the longest dimension to the shortest dimension for any single particle) not greater than 1.1 and more than 80% having an aspect ratio not greater than 1.05 and having a geometric mean size of from 0.02 to 0.5 microns. Usually the product contains no more than 3% by weight as aggregates and preferably the product is as small as can conveniently be manufactured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.