Method of producing ferromagnetic metal powder by gaseous reduction of silicon compound-coated raw material
US4043846A · kind A · utility
12Cited by
8References
24Claims
0Family size
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Key dates
| Filing date | Mar 17, 1976 |
| Grant date | Aug 23, 1977 |
| Priority date | — |
| Expiry date | Mar 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/065
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of producing ferromagnetic iron powder comprises the steps of dipping iron compound powder in a solution in which silicone oil is dissolved, removing solvent from the iron compound powder, reducing the iron compound powder in a reducing atmosphere at an elevated temperature and forming oxide layers on whole surfaces of the individual particles of the iron compound powder. Ferromagnetic iron powder produced according to this method has both a high coercive force and a high remanence ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.