Iron-based soft magnetic powder for dust core, method for production thereof, and dust core
US8445105B2 · kind B2 · utility
3Cited by
4References
18Claims
0Family size
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Key dates
| Filing date | Aug 2, 2007 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Nov 17, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2995
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An iron-based magnetic powder for dust cores has layers of phosphoric acid-based film and silicone resin film sequentially formed on the surface thereof. The phosphoric acid-based film contains at least one element selected from the group consisting of Co, Na, S, Si, and W. The iron-based powder effectively keeps insulation among iron powder particles, excels in mechanical strength even though the amount of insulating material is reduced due to achieve high-density forming, and exhibits good thermal stability necessary for electrical insulating properties even after high-temperature heat treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.