Powder magnetic core with silica-based insulating film, method of producing the same, and electromagnetic circuit component
US11183321B2 · kind B2 · utility
1Cited by
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5Claims
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Key dates
| Filing date | Mar 30, 2017 |
| Grant date | Nov 23, 2021 |
| Priority date | — |
| Expiry date | Sep 21, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a powder magnetic core with silica-based insulating film having a structure in which a plurality of Fe-based soft magnetic powder particles having surfaces coated with a silica-based insulating film are joined with each other through a grain boundary layer made of the silica-based insulating film. Fe diffused from the Fe-based soft magnetic powder particles is contained in the grain boundary layer and the grain boundary layer contains an oxide of each of Fe and Si or a composite oxide of Fe and Si.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.