Title:
COMPOSITE SOFT MAGNETIC MATERIAL AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2010/073590
Kind Code:
A1
Abstract:
Disclosed is a composite soft magnetic material which is characterized by being obtained by mixing, compacting and firing an iron powder, which has been subjected to an insulating treatment, a Sendust alloy powder and a binder. The composite soft magnetic material is also characterized by comprising a main phase in which the iron powder and the Sendust alloy powder are compacted, and a grain boundary phase which is formed around the main phase and is mainly composed of the binder, and by having a ratio of the Sendust alloy in the main phase of 5% by mass or more, but less than 20% by mass, a saturation magnetic flux density at a magnetic field of 10 kA/m of 1 T or more, a coercivity of 260 A/m or less, and an iron loss (at 0.1 T, 10 kHz) of 20 W/kg or less. Consequently, the composite soft magnetic material has characteristics of the Sendust alloy, namely a high magnetic permeability, low coercivity and low iron loss, while maintaining a high saturation magnetic flux density which is intrinsic to an iron powder. Also disclosed is a method for producing the composite soft magnetic material.
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Inventors:
WATANABE MUNEAKI (JP)
IGARASHI KAZUNORI (JP)
IGARASHI KAZUNORI (JP)
Application Number:
PCT/JP2009/007070
Publication Date:
July 01, 2010
Filing Date:
December 21, 2009
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
DIAMET CORP (JP)
WATANABE MUNEAKI (JP)
IGARASHI KAZUNORI (JP)
DIAMET CORP (JP)
WATANABE MUNEAKI (JP)
IGARASHI KAZUNORI (JP)
International Classes:
B22F3/00; B22F1/12; B22F1/16; C22C33/02; C22C38/00; H01F1/147; H01F1/22; H01F41/02
Foreign References:
| JP2005303006A | 2005-10-27 | |||
| JP2002093612A | 2002-03-29 | |||
| JPH06236808A | 1994-08-23 | |||
| JP2005093350A | 2005-04-07 | |||
| JP2006332524A | 2006-12-07 |
Attorney, Agent or Firm:
SHIGA, Masatake et al. (JP)
Masatake Shiga (JP)
Masatake Shiga (JP)
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