Magnetic powder, and manufacturing method thereof
US11225720B2 · kind B2 · utility
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13Claims
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Key dates
| Filing date | Sep 24, 2018 |
| Grant date | Jan 18, 2022 |
| Priority date | — |
| Expiry date | Dec 31, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A magnetic powder contains magnetic particles, a first coating layer disposed on surfaces of the magnetic particles and containing a first glass, and a second coating layer disposed on the first coating layer and containing a second glass different from the first glass. A method of manufacturing magnetic powder includes preparing magnetic particles, forming a first coating layer containing a first glass on surfaces of the magnetic particles, and forming a second coating layer containing a second glass different from the first glass on the first coating layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.