Iron-based soft magnetic powder and production method thereof
US9589712B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2012 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Dec 10, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12181
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Disclosed is an iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization, and thermally reducing the iron-oxide-based soft magnetic powder. The iron-based soft magnetic powder has an average particle size of 100 μm or more and has an interface density of more than 0 μm−1 and less than or equal to 2.6×10−2 μm−1, where the interface density is determined from a cross-sectional area (μm2) and a cross-sectional circumference (μm) of the iron-based soft magnetic powder. The iron-based soft magnetic powder obtained by preparing an iron-oxide-based soft magnetic powder through water atomization and thermally reducing the iron-oxide-based soft magnetic powder, when used for the production of a dust core, can give a dust core having a low coercive force. Also disclosed is a duct core having a low coercive force and exhibiting superior magnetic properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.