Method of controlling a growth of grains in a Rare Earth Permanent Magnet

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The present invention relates to a method for manufacturing a rare earth sintered magnet, which can improve coercive force by replacing doping elements using heavy rare earth. The method comprises : forming a molded body by using rare earth magnet raw material powder and refractory metal sulfide powder; performing a sintering process for the molded body to form a preliminary sintered body; and performing an annealing process for the preliminary sintered body to form a sintered body.COPYRIGHT KIPO 2018