| 摘要 |
PURPOSE:To provide an anisotropic magnet whose magnetic anisotropy is excellent and whose coercive-force temperature coefficient is small by a method wherein it is manufactured by using an R-Fe-Co-B-based permanent magnetic powder which is obtained by a hydrogen treatment. CONSTITUTION:The title magnet is an R-Fe-Co-B-based anisotropic magnet which contains 10 to 20% of R, 0.1 to 50% of Co, 3 to 20% of B, 0.001 to 5.0% of one or more kinds out of Ga, Zr and HF and, in addition, 0.1 to 2.0% of one or more kinds out of Al, V and Si as required in terms of atomic % as well as Fe and inevitable impurities as its remainder, which is composed of the aggregate tissue of crystal particles having an average particle size of 0.05 to 3mum, which is provided with a tissure where crystal particles having a longest particle size/a shortest particle size of individual crystal particles <2 exist at 50 vol.% or higher of all crystal particles and whose coercive-force temperature coefficient is small. |
