Title: 2-17 type rare-earth permament magnet having temp. compensation
Application Number: 85104348 Application Date: 1985.06.03
Publication Number: 1011003 Publication Date: 1987.05.13
Approval Pub. Date: Granted Pub. Date: 1989.10.25
International Classifi-cation: C22C1/04,C22C19/07,H01F1/08
Applicant(s) Name: Baotou Rare-earth Research Inst., Ministry of Meta Address:
Inventor(s) Name: Chang Ke
Attorney & Agent: CHEN PEIQI
Abstract:
     The present magnet consists: in that the alloy constituent, part of samarium is substituted by gadolinium, Sm/Gd equal to 4/1-3/2; and others, by weight the percentages are Co 45-47%, Cu 6%, Fe 16-18%, Zr 2-3%. Three stages of sintering are adopted, then isothermic and graduated aging treatments are proceeded. The following characteristics can be attained by the magnet: Br=8800-10096Gs, bH=8000-86000e, JHc is great than or equal to 15000 Oe, (BHc) max=18-21 MGOc. Within the range of 20-120 deg.C the average reversable coefficient of temperature is reduced to -0.007--0.12% deg.C.
Time: 5
<- Previous Patent:Single phase output electric and ...   |  Next Patent:Peak transform ->