Isotropic permanent magnets and process for producing same

Details Isotropic permanent magnets and process for producing same Isotropic permanent magnets and process for producing same

H - Electricity

01

F

75/14, 75/154, 1

H01F 1/08 (2006.01) H01F 1/053 (2006.01) H01F 1/057 (2006.01)

Patent

CA 1277159

ABSTRACT ISOTROPIC PERMANENT MAGNETS AND PROCESS FOR PRODUCING SAME Isotropic permanent magnet formed of a sintered body having a mean crystal grain size of 1 - 160 microns and a major phase of tetragonal system comprising, in atomic percent, 10 - 25 % of R wherein R represents at least one of rare-earth elements including Y, 3 - 23 % of B and the balance being Fe. As additional elements M, Al, Ti, V, Cr, Mn, Zr, Hf, Nb, Ta, Mo, Ge, Sb, Sn, Bi, Ni or W may be incorporated. The magnets can be produced through a powder metallurgical process resulting in high magnetic properties, e.g., up to 7 MGOe or higher energy product.

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