The method for preparation of R-Fe-B type rare earth magnet powder for bonded magnet, R-Fe-B type r

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PURPOSE : A method for preparation of R-Fe-B type rare earth magnet powder for bonded magnet, R-Fe-B type rare earth magnet powder thereby and a method for preparation of bonded magnet using the magnet powder, bonded magnet thereby are provided to improve magnetic property by manufacturing thee magnetic powder of minute size. CONSTITUTION : A method for preparation of R-Fe-B type rare earth magnet powder for bonded magnet comprises the next step. The rare earth sintered magnet is milled(1 step). Hydrogen is filled in the crushed material, which is manufactured through the first step, and the temperature of a tube furnace is increased(2 step). At the hydrogen atmosphere same as the second step, the temperature of the tube furnace increases(3 step). The hydrogen exhausted from the tube furnace(4 step). The hydrogen pressure of is vacuum-exhausted to the tube after the step 4(5 step). COPYRIGHT KIPO 2012