Method of producing rare-earth magnet

Abstract

A method of producing a rare-earth magnet containing a rare-earth compound having a first rare-earth element and a second rare-earth element different from the first rare-earth element includes: a mixing step of mixing rare-earth compound powder including the first rare-earth element and subjected to a process based on hydrogenation disproportionation desorption recombination with a diffusion material including the second rare-earth element; a molding step of molding the mixed powder into a compact in a magnetic field; and a heating step of heating the compact to diffuse the second rare-earth element into the rare-earth compound powder.

1 . A method of producing a rare-earth magnet containing a rare-earth compound having a first rare-earth element and a second rare-earth element different from the first rare-earth element, comprising:
 a mixing step of mixing rare-earth compound powder including the first rare-earth element and subjected to a process based on hydrogenation disproportionation desorption recombination with a diffusion material including the second rare-earth element;   a molding step of molding the mixed powder into a compact in a magnetic field; and   a heating step of heating the compact to diffuse the second rare-earth element into the rare-earth compound powder.   
     
     
         2 . The method of producing the rare-earth magnet according to  claim 1 , further comprising an impregnating step of impregnating the compact with resin and curing the resin to obtain the rare-earth bonded magnet after the heating step. 
     
     
         3 . The method of producing the rare-earth magnet according to  claim 1 , further comprising:
 a pulverizing step of pulverizing the compact to prepare pulverized powder after the heating step; and   a magnet producing step of molding the mixture of the pulverized powder and resin in the magnetic field and curing the resin to obtain the rare-earth bonded magnet.