METHOD OF PRODUCING ANISOTROPIC FERRITE MAGNET, ANISOTROPIC FERRITE MAGNET, HEXAGONAL FERRITE PARTICLES, AND METHOD FOR PRODUCING THEM.

摘要

A slurry containing ferrite particles and an organic solvent is wet molded in a magnetic field while removing the organic solvent, to obtain a molded article. This molded article is sintered to provide an anisotropic ferrite magnet. In this case, a surfactant is added to the slurry during wet molding. In addition to the surfactant or in place thereof, the ferrite particles are pulverized so as to impart at least 1 x 10<-><4> of strain of a (206) plane measured by X-ray diffraction, and to reduce iHc preferably below 3.5 kOe. In these ways, orientation of the molded article can be drastically improved, and extremely high magnetic characteristics can be obtained.