| 摘要 |
PURPOSE: To provide a magnet having excellent magnetic characteristics and high reliability, in particular, a magnet having an excellent thermal stability. CONSTITUTION: A magnet powder consists of an alloy composition expressed by Rx(Fe1-yCoy)100-x-z-wBzNbw (wherein R represents at least one kind of rare earth element, x: 7.1 to 9 at.%, y: 0 to 0.30, z: 4.6 to 6.9 at.%, and w: 0.2 to 3.5 at.%), and constituted with a complex composition having a soft magnetic phase and a hard magnetic phase. When the powder is mixed with a bonding resin and molded to obtain an isotropic bond magnet having a density ρ£Mg/m3|, the maximum magnetic energy product (BH)max£kJ/m3| at room temperature satisfies the relation (BH)max/ρ2£x10-9J.m3/g2| >= 2.2 of the bond magnet, and moreover, the intrinsic coercive force HcJ at room temperature is 320 to 720 kA/m.
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