摘要
Baotou Research Institute of RareEarth(BRIR)developed a highly ther-mostable permanent magnet based on REand Fe,and took out a patent from theChinese Patent Office on August 8,1990.This magnet shows residual flux densi-ty 9000-11500G,intrinsic coercive force14000-18000 Oe,maximum energy product20-30 MGOe when the permeability is2,irreversible loss in open circuitmagnetic remanence 10%(after heating
