Anisotropic bonded magnet and preparation method thereof
US11802326B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 26, 2021 |
| Grant date | Oct 31, 2023 |
| Priority date | — |
| Expiry date | May 26, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An anisotropic bonded magnet and a preparation method thereof are provided. By stacking magnets having different magnetic properties and/or densities, the magnets in the middle have high properties and the magnets at two ends and/or the periphery have low properties, thereby compensating for a property deviation caused by a difference in pressing densities during a pressing process, and improving the property uniformity of the magnets in an axial direction. The method solves the problem of “low in the middle and high at two ends” caused by the phenomenon of non-uniform magnetic field orientation and density along a height direction during orientation and densification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.