Title:
磁性材料とその製造法
Document Type and Number:
Japanese Patent JP6942379
Kind Code:
B2
Abstract:
Provided are: a novel magnetic material having high magnetic stability, in particular, having an extremely high saturation magnetization; and a method for producing the same, wherein the magnetic material, due to having a higher saturation magnetization than ferrite magnetic materials and a higher electrical resistivity than existing metallic magnetic materials, resolves problems such as eddy current loss. According to the present invention, Co-ferrite nanoparticles obtained by wet synthesis are reduced in hydrogen and subjected to grain growth, and bcc- or fcc-(Fe, Co) phases and Co-enriched phases are nano-dispersed using phase separation via a disproportionation reaction to prepare a magnetic material powder. In addition, the magnetic material powder is sintered into a solid magnetic material.
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Inventors:
Shinpei Yamamoto
Nobuyoshi Imaoka
Kimihiro Ozaki
Nobuyoshi Imaoka
Kimihiro Ozaki
Application Number:
JP2019543691A
Publication Date:
September 29, 2021
Filing Date:
September 20, 2018
Export Citation:
Assignee:
National Institute of Advanced Industrial Science and Technology
International Classes:
B22F1/00; B22F3/00; B22F3/24; C22C38/00; H01F1/12
Domestic Patent References:
| JP2015200018A | ||||
| JP2008108760A | ||||
| JP2000156314A |
Other References:
ZEHANI, K. et al.,Structual, magnetic, and electronic properties of high moment FeCo nanoparticles,JOURNAL OF ALLOYS AND COMPOUNDS,2014年04月05日,Vol.591,P.58-64
Attorney, Agent or Firm:
Asamura patent office