PRODUCTION METHOD OF BASE POWDER FOR RARE EARTH SINTERED MAGNET, AND BASE POWDER FOR RARE EARTH SIN

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PROBLEM TO BE SOLVED : To produce a base powder for rare earth sintered magnet, used for manufacturing a rare earth sintered magnet, where the content of base powder particles composed of single crystal is high. SOLUTION : A production method of base powder for rare earth sintered magnet has a coarse powder dispersion preparation step 12 of preparing a coarse powder dispersion by dispersing rare earth alloy coarse powder, having the same composition as the main component of a rare earth sintered magnet, into dispersed oil mainly composed of hydrocarbon, a wet pulverization step 13 of pulverizing the rare earth alloy coarse powder in the coarse powder dispersion, by making a jet of the coarse powder dispersion collide against a collision object, and a deoiling step 14 of removing the dispersed oil from the coarse powder dispersion after the wet pulverization step. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2017, JPO&INPIT