Ferrite sintered magnet, ferrite particles, bonded magnet, motor, and generator
US11810699B2 · kind B2 · utility
1Cited by
5References
4Claims
0Family size
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Key dates
| Filing date | Dec 22, 2017 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Feb 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K23/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a ferrite sintered magnet including a ferrite phase having a magnetoplumbite-type crystal structure. x, y, and m satisfy the following Equations (1), (2), and (3) when composition of the ferrite sintered magnet is represented by R1-xAxFem-yCoy, where R denotes at least one kind of element selected from rare earth elements including Y and A denotes Ca or Ca and elements including at least one kind selected from Sr or Ba. The content of B in the ferrite sintered magnet is from 0.1% to 0.6% by mass in terms of B2O3. 0.2≤x≤0.8 (1)0.1≤y≤0.65 (2)3≤m<14 (3)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.