MNBI-BASED MAGNETIC SUBSTANCE, PREPARATION METHOD THEREOF, MNBI-BASED SINTERED MAGNET AND PREPARATION METHOD THEREOF

摘要

The method of preparing an MnBi-based magnetic substance according to the present invention includes: (a) preparing a mixed melt by simultaneously melting a manganese-based material and a bismuth-based material; (b) forming a non-magnetic MnBi-based ribbon by cooling the mixed melt; and (c) converting the non-magnetic MnBi-based ribbon into a magnetic MnBi-based ribbon by performing a heat treatment. The method for preparing an MnBi-based sintered magnet includes: (a) preparing a magnetic powder by pulverizing the MnBi-based magnetic substance; (b) molding the magnetic powder in a state where a magnetic field is applied; and (c) sintering the molded magnetic powder.