Invention Grant
- Patent Title: Magnetic material and method for producing same
-
Application No.: US16648836Application Date: 2018-09-20
-
Publication No.: US11459646B2Publication Date: 2022-10-04
- Inventor: Nobuyoshi Imaoka , Shinpei Yamamoto , Kimihiro Ozaki
- Applicant: National Institute of Advanced Industrial Science and Technology
- Applicant Address: JP Tokyo
- Assignee: National Institute of Advanced Industrial Science and Technology
- Current Assignee: National Institute of Advanced Industrial Science and Technology
- Current Assignee Address: JP Tokyo
- Agency: Morgan, Lewis & Bockius LLP
- Priority: JPJP2017-183907 20170925,JPJP2017-222150 20171117
- International Application: PCT/JP2018/034752 WO 20180920
- International Announcement: WO2019/059259 WO 20190328
- Main IPC: C22C38/16
- IPC: C22C38/16 ; C22C38/10 ; C22C38/08 ; C22C38/04 ; C22C38/02 ; B22F1/00 ; B22F9/22 ; H01F1/34 ; H01F1/36 ; B22F1/05 ; H01F1/055 ; H01F1/22

Abstract:
The purpose of the present invention is to provide: a new magnetic material which exhibits high magnetic stability and excellent oxidation resistance and which can achieve both significantly higher saturation magnetization and lower coercive force than a conventional ferrite-based magnetic material by using a magnetic material obtained by nanodispersing α-(Fe,M) phases and M component-enriched phases (here, the M component is at least one component selected from among Zr, Hf, V, Nb, Ta, Cr, Mo, W, Cu, Zn and Si); and a method for producing same. This magnetic material powder exhibits high moldability, and is such that α-(Fe, M) phases and M-enriched phases are nanodispersed by chemically reducing M-ferrite nanoparticles, which are obtained by means of wet synthesis, in hydrogen and utilizing phase separation by means of a disproportionation reaction while simultaneously carrying out grain growth. Furthermore, a solid magnetic material is obtained by sintering this powder.
Public/Granted literature
- US20200248288A1 Magnetic Material and Method for Producing Same Public/Granted day:2020-08-06
Information query