| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnet having excellent magnetic characteristics and high reliability, in particular, a magnet having an excellent thermal stability. SOLUTION: A magnet powder consists of an alloy composition expressed by Rx(Fe1-yCoy)100-x-z-wBzAlw (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: 0.02 to 1.5 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[×10-9J.m3/g2]>=2.2 of the bond magnet, and moreover, the intrinsic coercive force HcJ at room temperature is 320 to 720 kA/m. |
