| 简介 |
PROBLEM TO BE SOLVED : To provide a manufacturing method for stably producing rare earth-transition metal-nitrogen system magnet powder showing excellent magnetic characteristics by a reduction distribution method without generating any composition shift, a composition for bond magnet using this and a bond magnet for attaining the miniaturization and high characterization of various equipment.
SOLUTION : This method for manufacturing a rare earth-transition metal-nitrogen system magnet powder by a reduction distribution method comprises a step for preparing raw material rare earth-transition metal-nitrogen system magnet powder (A) whose rare earth element quantity is 5 atom% or more, and for mixing the rare earth oxide powder (B) with reduction agent for reducing the rare earth oxide powder (B); a step for generating a reduction distribution reaction product constituted of the rare earth-transition metal system mother alloy by heating and baking the mixture in non-oxidizing atmosphere; and a step for heating and nitriding the obtained reduction distribution reaction product in a nitrogen containing atmosphere.
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