Rare earth magnet and preparation method thereof
US12131850B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jun 24, 2021 |
| Grant date | Oct 29, 2024 |
| Priority date | — |
| Expiry date | May 11, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0273
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A NdFeB rare earth magnet includes a main phase and a grain boundary phase including a white grain boundary phase and a gray grain boundary phase. In a microstructure observation area of the rare earth magnet, an area of the white grain accounts for 1˜3% of a total area of the microstructure observation area, and an area of the gray grain boundary phase accounts for 2˜10% of the total area of the microstructure observation area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.