Title:
圧粉磁心およびその製造方法
Document Type and Number:
Japanese Patent JP6420495
Kind Code:
B2
Abstract:
Provided, as a dust core which uses an amorphous magnetic material having excellent magnetic characteristics and is able to achieve high mechanical strength and high thermal stability, while having low loss, is a dust core which contains a magnetic powder of an Fe-based Cr-containing amorphous alloy and an inorganic binder, and which is characterized in that: the surface oxide layer of the magnetic powder contains Fe, Cr, Bi and Mo; the surface oxide layer still contains Mo even in the effective thickness D (unit: nm) of the surface oxide layer as determined by the formula described below using a depth D1 (unit: nm) at which the oxygen content (unit: atom%) has the maximum value Imax and a depth D2 (unit: nm) which is deeper than D1 and at which the oxygen content is 1/2 of the maximum value Imax in the depth profile of the composition of the surface oxide layer; and the inorganic binder is composed of an oxide material containing Bi and Mo. D = D1 + (D2 - D1) × 2
Inventors:
Yutaka Yamamoto
Koichi Fujita
Kuniko Toda
Koichi Fujita
Kuniko Toda
Application Number:
JP2017551809A
Publication Date:
November 07, 2018
Filing Date:
November 01, 2016
Export Citation:
Assignee:
ALPS ELECTRIC CO.,LTD.
International Classes:
H01F1/153; B22F1/08; B22F1/16; B22F3/00; B22F3/02; B22F9/08; H01F3/08; H01F27/255; H01F41/02
Domestic Patent References:
| JP2012212853A | ||||
| JP2009010180A | ||||
| JP2006245183A |
Attorney, Agent or Firm:
Katsuyuki Okubo
野▲崎▼ 照夫
Masahiro Matsushita
野▲崎▼ 照夫
Masahiro Matsushita
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