| 摘要 |
PROBLEM TO BE SOLVED: To provide a rare-earth bonding magnet, which is economical and has high performances. SOLUTION: This rare-earth bonding magnet is the rare-earth-based magnetic material containing Nb2 Fe14 B-type crystal. This material is constituted of the magnetic powder, which is the crushed powder of the quickly cooled thin belt having a rare-earth-element content of 8-11at.% and iHc of 7 kOe or more and has the average particle diameter of 110μm or more, and the magnetic powder having the following properties. This magnetic powder is the crushed powder of replaced-spring-magnet thin belt with an average particle size of 50μm or less, which is constituted of soft magnetic phase and hard magnetic phase, which have a rare-earth-element content of 8wt.% or less, an iHc of 3.5-6.0 kOe , a Br of 10kG or more and a crystal-particle diameter controlled at 10-100μm, and amorphous phase having 10 area % or less and bonding resin. Thus, the rare-earth-bond magnet having the magnetic characteristics of the Br (remnant magnetic filed density) of 8kG or more, an iHc (coercive force) of 5 kOe or more and an energy product (BH) max of 11MGOe or more is obtained. |
