Method for producing rare-earth magnets, and rare-earth-compound application device
US10916372B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2016 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Apr 18, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2003/248
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
When a slurry 41 obtained by dispersing a rare-earth-compound powder in a solvent is applied to sintered magnet bodies 1, and dried to remove the solvent in the slurry and cause the surfaces of the sintered magnet bodies to be coated with the powder, and the sintered magnet bodies coated with the powder are heat treated to cause the rare-earth element to be absorbed by the sintered magnet bodies, the sintered magnet bodies having had the slurry applied thereto are dried by being irradiated with near infrared radiation having a wavelength of 0.8-5 μm, to remove the solvent in the slurry, and cause the surfaces of the sintered magnet bodies to be coated with the powder. As a result, the rare-earth-compound powder can be uniformly and efficiently applied to the surfaces of the sintered magnet bodies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.