Production process of ferromagnetic iron powder
US4469506A · kind A · utility
2Cited by
2References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1983 |
| Grant date | Sep 4, 1984 |
| Priority date | — |
| Expiry date | Jan 24, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F1/102
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a process for producing ferromagnetic iron powder, which process comprises adding and mixing boron oxide or a borate with .alpha.-FeOOH or .alpha.-Fe.sub.2 O.sub.3 without dissolving the former, heating the thus-obtained mixture to 350.degree. C. or higher in a non-reducing atmosphere and then reducing the thus-heated mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.