High-performance anisotropic plastics magnet and a process for producing the same

摘要

An anisotropic plastics magnet having a maximum energy product (BH)max not lower than 0.9 MG Oe, a remanence Br not lower than 2000G and a coercive force Hc not lower than 1800 Oe, and being composed at least one of ferromagnetic powders having a large magnetic anisotropy constant and at least one selected from the group consisting of metal-cross-linked copolymers of alpha -olefin and alpha , beta unsaturated mono- or dicarboxylic acid and saponified copolymers of ethylene and vinyl acetate, the axis of the easy magnetization of said ferromagnetic powders being oriented substantially in one direction, and a process for producing the same comprising mixing the ferromagnetic powder and the resin and forming the mixture under heating while a magnetic field is being applied.