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Title:
IRON-BASED SOFT MAGNETIC ALLOY AND DUST CORE COMPRISING THE IRON-BASED SOFT MAGNETIC ALLOY
Document Type and Number:
WIPO Patent Application WO/2010/084900
Kind Code:
A1
Abstract:
An iron-based soft magnetic alloy with which a low core loss and high direct-current bias characteristics can be obtained; and a dust core formed using the iron-based soft magnetic alloy. The iron-based soft magnetic alloy is characterized by comprising iron and element R, the element R being at least one of P, C, B, and Si. The alloy is further characterized in that the difference in precipitation temperature between an α-Fe crystal phase and an iron compound is 20ºC or more, and that the alloy is constituted of a mixed-phase structure composed of an amorphous phase and the α-Fe crystal phase, the α-Fe crystal phase having a crystallite diameter of 50 nm or smaller, and the volume proportion of the α-Fe crystal phase being not higher than 40% of the total. The alloy may be represented by the empirical formula Fe100-x-uJxRu, wherein element J is at least one of Cr, Co, Ni, and Nb, 0 at.%≤x≤6 at.%, 17 at.%≤u≤25 at.%, and 17 at.%≤x+u≤27.1 at.%.

Inventors:
KOSHIBA, Hisato (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
小柴 寿人 (〒01 東京都大田区雪谷大塚町1番7号 アルプス電気株式会社内 Tokyo, 〒1458501, JP)
TSUCHIYA, Keiko (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
土屋 景子 (〒01 東京都大田区雪谷大塚町1番7号 アルプス電気株式会社内 Tokyo, 〒1458501, JP)
Application Number:
JP2010/050673
Publication Date:
July 29, 2010
Filing Date:
January 21, 2010
Export Citation:
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Assignee:
ALPS ELECTRIC CO., LTD. (1-7 Yukigaya-otsukamachi, Ota-ku Tokyo, 01, 〒1458501, JP)
アルプス電気株式会社 (〒01 東京都大田区雪谷大塚町1番7号 Tokyo, 〒1458501, JP)
KOSHIBA, Hisato (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
小柴 寿人 (〒01 東京都大田区雪谷大塚町1番7号 アルプス電気株式会社内 Tokyo, 〒1458501, JP)
TSUCHIYA, Keiko (1-7, Yukigaya-otsukamachi, Ota-k, Tokyo 01, 〒1458501, JP)
International Classes:
C22C45/02; B22F1/00; B22F3/00; C22C38/00; H01F1/14; H01F1/153
Foreign References:
JP2713373B21998-02-16
JP2008169466A2008-07-24
JP2008248380A2008-10-16
JP3771224B22006-04-26
JP2005307291A2005-11-04
JP2009007639A2009-01-15
JP2003213331A2003-07-30
JP2004156134A2004-06-03
JPS6428301A1989-01-30
JPH02180005A1990-07-12
JPS6468446A1989-03-14
JP2005068451A2005-03-17
JP2007270271A2007-10-18
JPH02232301A1990-09-14
JPS57185957A1982-11-16
JPS63117406A1988-05-21
Attorney, Agent or Firm:
NOZAKI, Teruo et al. (Oak Ikebukuro Building 3F, 1-21-11 Higashi-Ikebukuro Toshima-k, Tokyo 13, 〒1700013, JP)
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