Method for producing aluminum oxide coated iron powder
US4900590A · kind A · utility
8Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1989 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Jan 3, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C18/1275
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method is disclosed for producing aluminum oxide coated iron powder which comprises contacting iron powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the iron powder to form a slurry, removing essentially all of the liquid from the slurry to produce iron powder with a coating of hydrolyzed aluminum oxide, and firing the iron powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce iron powder with a coating of aluminum oxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.