METHOD OF PRODUCING RARE EARTH-TRANSITION METAL-NITROGEN-BASED MAGNET POWDER, RESULTANT RARE EARTH-TRANSITION METAL-NITROGEN-BASED MAGNET POWDER, AND COMPOSITION FOR BOND MAGNET USING THE SAME, AND BOND MAGNET USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide production capable of safely, inexpensively and safely producing rare-earth transition metal-nitrogen-based magnet powders by a reduction diffusion method without reducing magnetic characteristics, and without using gaseous hydrogen or causing a reduced product to disintegrate by reducing an amount of use, a composition for a bond magnet using the same, and a bond magnet capable of making various apparatuses smaller in sizes and higher in characteristics.;SOLUTION: The production method of the rare-earth transition metal-nitrogen-based magnet powder comprising using water or water and gaseous hydrogen in the disintegration in a step of mixing transition metal alloy powder, rare earth oxide powder, and a reducing agent for reducing the rare earth oxide powder, and subjecting the mixture to heating calcination in a non-oxidizing atmosphere to form a reduction diffusion reaction product, then causing the resultant reduced product to disintegrate and expressed by the following formula (1) is provided. R_xFe_(100-x-y-z)M_yN_z(1) (In the formula, R denotes rare earth element, M denotes a rare-earth transition metal selected from the group consisting of Cu, Mn, Cr, Ti, Ni and Zr; x. y, z satisfy, by atomic %, 4≤x≤18%, 0.3≤y≤23%, and 15≤z≤25%).;COPYRIGHT: (C)2009,JPO&INPIT