Title:
DUST CORE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2017/086148
Kind Code:
A1
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:
YAMAMOTO YUTAKA (JP)
FUJITA KOICHI (JP)
TODA KUNIKO (JP)
FUJITA KOICHI (JP)
TODA KUNIKO (JP)
Application Number:
PCT/JP2016/082432
Publication Date:
May 26, 2017
Filing Date:
November 01, 2016
Export Citation:
Assignee:
ALPS ELECTRIC CO LTD (JP)
International Classes:
H01F1/24; B22F1/08; B22F1/16; B22F3/00; B22F3/02; B22F3/24; B22F9/08; H01F1/153; H01F41/02
Foreign References:
| JP2012212853A | 2012-11-01 | |||
| JP2009010180A | 2009-01-15 | |||
| JP2006245183A | 2006-09-14 |
Attorney, Agent or Firm:
OKUBO, Katsuyuki (JP)
Download PDF: