Rare earth-cobalt-based composite magnetic material
US10535451B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2017 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Feb 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F41/0266
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A rare earth-cobalt-based composite magnetic material includes a rare earth-cobalt-based composite material and rare earth oxides, wherein the mass percent of the rare earth-cobalt-based composite material is 40 wt %-98.55 wt %. The composite magnetic material is obtained by melting and casting the rare earth-cobalt-based composite material into ingots, hydrogen decrepitation and the addition of the rare earth oxides, jet milling, blending, orientation and molding, cold isostatic pressing and heat treatment. Low-cost rare earth oxides are introduced, the remanence of the rare earth-cobalt-based material is controlled by controlling the content of the rare earth oxides, and the coercive force of the rare earth-cobalt-based material is raised to reduce the cost by optimizing the micro-structure and the composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.