METHOD FOR MANUFACTURING RARE EARTH-IRON-NITROGEN BASED MAGNET POWDER, RESIN COMPOSITION FOR BOND M

PROBLEM TO BE SOLVED : To provide : a manufacturing method by which rare earth-iron-nitrogen based magnet powder surface-coated and superior in weather resistance can be obtained; a resin composition for a bond magnet; and a method for manufacturing the bond magnet. SOLUTION : A method for manufacturing rare earth-iron-nitrogen based magnet powder to be used for a rare earth-iron-nitrogen based bond magnet comprises the steps of : mixing raw material powder of rare earth oxide powder and iron powder with a reductant powder in a predetermined proportion; heating resultant powder mixture to perform a reduction and diffusion process thereon in an inert gas atmosphere to obtain a rare earth-iron based mother alloy; then, performing a nitriding treatment on the rare earth-iron based mother alloy in a mixed air stream of ammonia and hydrogen to obtain rare earth-iron-nitrogen based magnet coarse powder; subjecting the rare earth-iron-nitrogen based magnet coarse powder to a wet process and a cracking process into cracked magnet powder; and drying the resultant magnetic powder by heating, in which an organic solvent containing mercaptobenzothiazole is used. SELECTED DRAWING : None COPYRIGHT : (C)2018, JPO&INPIT