Permanent magnet and method for manufacturing the same, and motor and power generator using the same
US8568539B2 · kind B2 · utility
2Cited by
6References
14Claims
0Family size
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Key dates
| Filing date | Mar 25, 2011 |
| Grant date | Oct 29, 2013 |
| Priority date | — |
| Expiry date | Jun 29, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
According to one embodiment, a permanent magnet is provided with a sintered body having a composition represented by R(FepMqCurCo1-p-q-r)zOw (where, R is at least one element selected from rare-earth elements, M is at least one element selected from Ti, Zr and Hf, and p, q, r, z and w are numbers satisfying 0.25≦p≦0.6, 0.005≦q≦0.1, 0.01≦r≦0.1, 4≦z≦9 and 0.005≦w≦0.6 in terms of atomic ratio). The sintered body has therein aggregates of oxides containing the element R dispersed substantially uniformly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.