Iron-based soft magnetic powder for dust core, method for manufacturing the same, and dust core
US10256019B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Aug 5, 2015 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | May 3, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12181
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An iron-based soft magnetic powder for dust core having a high magnetic flux density, maintaining high electric insulation even after annealing, and more excellent in the mechanical strength in which a coating film having a phosphate conversion coating film is formed on the surface thereof and the peak height for the absorption of hydroxyl groups formed at 3700 cm−1 to 2500 cm−1 is 0.04 or more being indicated by absorbance when the coating film is analyzed by infrared diffuse reflectance spectroscopy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.