Composite particle of soft-magnetic metallic material, method for producing composite particle, powder core, magnetic element, and portable electronic device
US9767956B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2013 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Oct 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/33
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A composite particle includes: a particle composed of a soft magnetic metallic material, and a coating layer composed of a soft magnetic metallic material having a different composition from that of the particle and fusion-bonded to the particle so as to cover the particle, wherein when the Vickers hardness of the particle is represented by HV1 and the Vickers hardness of the coating layer is represented by HV2, HV1 and HV2 satisfy the following relationship: 100≦HV1−HV2, and when half of the projected area circle equivalent diameter of the particle is represented by r and the average thickness of the coating layer is represented by t, r and t satisfy the following relationship: 0.05≦t/r≦1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.