Title:
SOFT MAGNETIC POWDER, POWDER GRANULES, DUST CORE, ELECTROMAGNETIC COMPONENT, AND METHOD FOR PRODUCING DUST CORE
Document Type and Number:
WIPO Patent Application WO/2011/148826
Kind Code:
A1
Abstract:
Disclosed is a soft magnetic powder for obtaining a dust core that has low hysteresis loss especially in a high temperature range. Specifically disclosed is a soft magnetic powder that is an assembly of composite magnetic particles each of which is obtained by forming an insulating coating film on the surface of a soft magnetic particle that contains Fe, Si and Al. The soft magnetic powder satisfies the formulae (1) and (2) below when the Si content is represented by a (mass%) and the Al content is represented by b (mass%). The soft magnetic powder is capable of reducing the hysteresis loss of a dust core, which is obtained using the soft magnetic powder, in a high temperature environment. 27 ≤ 2.5a + b ≤ 29 (1) 6 ≤ b ≤ 9 (2)
Inventors:
WATANABE ASAKO (JP)
MAEDA TORU (JP)
MAEDA TORU (JP)
Application Number:
PCT/JP2011/061304
Publication Date:
December 01, 2011
Filing Date:
May 17, 2011
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
WATANABE ASAKO (JP)
MAEDA TORU (JP)
WATANABE ASAKO (JP)
MAEDA TORU (JP)
International Classes:
B22F1/16; B22F3/00; B22F3/02; C22C38/00; H01F1/26; H01F27/255; H01F41/02
Foreign References:
| JP2005142308A | 2005-06-02 |
Other References:
None
See also references of EP 2578338A4
See also references of EP 2578338A4
Attorney, Agent or Firm:
NAKATA, Motomi et al. (JP)
Nakada Motoki (JP)
Nakada Motoki (JP)
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Claims: