| 摘要 |
PURPOSE:To obtain the titled magnet material in which irreversible temp. characteristic is improved especially, and various magnetic characteristics are also improved by giving the composite structure in which nonmagnetic phases composed mainly of rare earth element are dispersed in a magnetic phase composed mainly of rare earth element. CONSTITUTION:The permanent magnet has the composite structure in which the nonmagnetic phase (B component) of the compsn. indicated by an equation II(e.g.: Nd-69.5wt% Co) is dispersed in the magnetic phase (A component) of the compsn. indicated by an equation I (e.g.: Fe-19.36wt% Nd-2wt% Pr-12wt% B). In this case, the necessary condition is 70-90% ratio of A component. The permanent magnet of the invention has larger Br, He, (BH)max compared with usual intermetallic compound permanent magnet of SmCo5 or Sm2Co17 known as rare earth Co magnet. Especially in (RH)max, >=35MGOe, further, >=40MGOe is obtained in the high range. |
