Method of making cerium misch-metal/cobalt magnets
US4144105A · kind A · utility
7Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1976 |
| Grant date | Mar 13, 1979 |
| Priority date | — |
| Expiry date | Sep 9, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F1/0557
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A permanent magnetic material, predominantly containing cerium misch-metal (CeMM) and cobalt, characterized by the composition: EQU (CeMM.sub.1-x RE.sub.x).sub.1-y Sm.sub.y Co.sub.5.+-.0.2 wherein EQU 0<x<0.5; 0.ltoreq.y.ltoreq.0.25, wherein cerium misch-metal approximately possesses the composition EQU Ce.sub..alpha. La.sub..beta. Nd.sub..gamma. Pr.sub..delta., where 0.45<.alpha.<0.55 0.20<.beta.<0.40 0.05<.gamma.<0.15 0.00<.delta.<0.05 and .alpha.+.beta.+.gamma.+.delta..perspectiveto.1. And wherein RE consists of the alloy EQU Nd.sub.A Pr.sub.B (Ce, La, Sm).sub.C wherein A is 0.75, B is 0.22, C is less than 0.03 and A+B+C=1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.