公开(公告)号：US20190051436A1

公开(公告)日：2019-02-14

申请号：US16087854

申请日：2017-03-24

Applicant: National Institute of Advanced Industrial Science and Technology

Inventor： Nobuyoshi Imaoka ,  Kimihiro Ozaki

IPC: H01F1/147 ,  H01F41/02

Abstract: Provided is a new magnetic material with high magnetic stability, as well as a manufacturing method therefor, said magnetic material having a higher saturation magnetization than ferrite-based magnetic materials, and having a higher electrical resistivity than existing metal-based magnetic materials, thus solving problems such as that of eddy current loss. Ti-ferrite nanoparticles obtained through wet synthesis are reduced within hydrogen, and grains are allowed to grow while simultaneously using a phase separation phenomenon due to a disproportionation reaction to produce a magnetic material powder in which an α-(Fe, Ti) phase and a Ti-enriched phase are nano-dispersed. This powder is then sintered to produce a solid magnetic material.