Method of producing SmFeN-based rare earth magnet
US12027306B2 · kind B2 · utility
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Key dates
| Filing date | Jun 10, 2022 |
| Grant date | Jul 2, 2024 |
| Priority date | — |
| Expiry date | Jun 10, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0558
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of producing a SmFeN-based rare earth magnet, the method including: dispersing a SmFeN-based anisotropic magnetic powder comprising Sm, Fe, and N using a resin-coated metal media or a resin-coated ceramic media to obtain a dispersed SmFeN-based anisotropic magnetic powder; mixing the dispersed SmFeN-based anisotropic magnetic powder with a modifier powder to obtain a powder mixture; compacting the powder mixture in a magnetic field to obtain a magnetic field compact; pressure-sintering the magnetic field compact to obtain a sintered compact; and heat treating the sintered compact.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.