Method for producing rare earth alloy
US4769063A · kind A · utility
11Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Feb 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A rare earth alloy for producing permanent magnet comprised of: 15-65 atomic % R.sub.1, 35-83 atomic % Fe, and 0-15 atomic % B, where R.sub.1 represents at least one of heavy rare earth elements Gd, Tb, Dy, Ho, Er, Tm and Yb. This alloy is produced by reducing a mixture of correspoding rare earth oxides, Fe, and a boron containing material by Ca, contacting the reduced mass with water, and treating the resultant slurry with water. Using this alloy, Fe-B-R base magnets wherein R.sub.1 is substituted for part of R (R representing lanthanide and/or Y) having a high performance are produced with a reduced cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.