Soft magnetic powder, granulated powder, dust core, electromagnetic component, and method for producing dust core
US8797137B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2011 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Aug 27, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F3/08
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a soft magnetic powder used for obtaining a dust core having a low hysteresis loss, in particular, in a high temperature range. A soft magnetic powder includes an aggregate of composite magnetic particles, each including a soft magnetic particle containing Fe, Si, and Al, and an insulating coating film disposed on the surface thereof, and satisfies the expressions (1) and (2) below: Expression (1) . . . 27≦2.5a+b≦29 and Expression (2) . . . 6≦b≦9, where a represents the Si content (mass %) and b represents the Al content (mass %). The soft magnetic powder is capable of reducing the hysteresis loss, in a high-temperature environment, of a dust core obtained using the soft magnetic powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.