Title:
Fe基ナノ結晶合金粉末及びその製造方法、並びに、圧粉磁心及びその製造方法
Document Type and Number:
Japanese Patent JP5537534
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a dust core having an excellent magnetic characteristic.SOLUTION: Material powder for the dust core is constituted of not amorphous alloy powder but Fe-based nano-crystalline alloy powder. That is, heat treatment (P2) concerned in deposition of a nano-crystal phase is separated from hardening (P3) of the dust core, and nano crystallization is carried out before the hardening of the dust core. Further, a temperature elevation rate is made low before brought into the second crystallization starting temperature, when conducting the heat treatment concerned in the deposition of the nano-crystal phase. The dust core having an excellent soft magnetic characteristic and highly saturated magnetic flux density is obtained thereby using the nano-crystalline alloy powder deposited with a microscopic nano-crystal of 30 nm or less comprising bccFe of high magnetization.
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Inventors:
Miho Chiba
Hiroyuki Matsumoto
Akira Urata
Eisaku Yoshida
Akihiro Makino
Hiroyuki Matsumoto
Akira Urata
Eisaku Yoshida
Akihiro Makino
Application Number:
JP2011230809A
Publication Date:
July 02, 2014
Filing Date:
October 20, 2011
Export Citation:
Assignee:
NEC TOKIN CORPORATION
International Classes:
B22F1/00; B22F3/00; B22F9/08; C22C38/00; H01F1/14; H01F1/20; H01F1/22; H01F27/255; H01F41/02
Foreign References:
| WO2010021130A1 |
Attorney, Agent or Firm:
Takuya Yamazaki