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|1. (WO2018163967) MAGNETIC POWDER CONTAINING SM-FE-N CRYSTAL GRAINS, SINTERED MAGNET PRODUCED FROM SAME, METHOD FOR PRODUCING SAID MAGNETIC POWDER, AND METHOD FOR PRODUCING SAID SINTERED MAGNET|
|Applicants:||NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
MURATA MANUFACTURING CO., LTD.
|Title:||MAGNETIC POWDER CONTAINING SM-FE-N CRYSTAL GRAINS, SINTERED MAGNET PRODUCED FROM SAME, METHOD FOR PRODUCING SAID MAGNETIC POWDER, AND METHOD FOR PRODUCING SAID SINTERED MAGNET|
The purpose of the present invention is to provide: a sintered magnet which contains Sm-Fe-N crystal grains and has high coercivity; and a magnetic powder which is capable of forming a sintered magnet without lowering the coercivity even if heat is generated in association with the sintering. A sintered magnet which comprises a crystal phase that is composed of a plurality of Sm-Fe-N crystal grains and non-magnetic metal phases that are present between adjacent Sm-Fe-N crystal grains, and wherein the ratio of the Fe peak intensity IFe to the SmFeN peak intensity ISmFeN as determined by an X-ray diffraction method is 0.2 or less. A magnetic powder which contains Sm-Fe-N crystal grains and non-magnetic metal layers that cover the surfaces of the Sm-Fe-N crystal grains.