Method of manufacturing superfine magnetic metal powder
US4948422A · kind A · utility
3Cited by
2References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 2, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Feb 2, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In the present invention, reaction is carried out between hydrogen gas and a metal halide vapor while supplying to the reacting region an active gas whose reactivity with the metal halide vapor is higher than the reactivity of the hydrogen gas with the metal halide vapor. The particular technique permits efficiently manufacturing a superfine magnetic metal powder of satisfactory properties while minimizing the amount of the hydrogen gas used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.