Permanent magnetic material which contains rare earth metals, especially neodymium, and cobalt process for its production and its use
US4090892A · kind A · utility
5Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 14, 1977 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Jun 14, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnetic material has the composition (MM.sub.1-x ND.sub.x) .sub.1-y Sm.sub.y Co.sub.5, in which 0.25 < x < 1,0 .ltoreq. y .ltoreq. 0.25, and MM is a misch metal of the composition Ce.sub..alpha. La.sub..beta. Pr.sub..gamma. wherein the parameters .alpha., .beta., .gamma., satisfy the conditions EQU 0.50 < .alpha. < 0.70 EQU 0.22 < .beta. < 0.45 EQU 0.00 < .gamma. < 0.06, and EQU .alpha. + .beta. + .gamma. = 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.