Title:
METHOD FOR PRODUCING DUST CORE
Document Type and Number:
WIPO Patent Application WO/2010/084600
Kind Code:
A1
Abstract:
Disclosed is a method for producing a dust core having excellent electromagnetic characteristics, wherein an oxide is hardly produced between grain boundaries of the dust core during annealing after press molding. The method for producing a dust core comprises a step of forming a dust core by press molding a magnetic powder which is composed of particles for dust core which are obtained by coating iron-based magnetic particles with a silicone resin, and a step of annealing the dust core by heating the dust core so that a part of the silicone resin is formed into a silicate compound. In the annealing step, the annealing of the dust core is performed in a nitrogen gas atmosphere, while setting the dew point of the inert gas to -40˚C or less.
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Inventors:
SUGIYAMA, Masaki (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
杉山昌揮 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
YAMAGUCHI, Toshiya (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
山口登士也 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
杉山昌揮 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
YAMAGUCHI, Toshiya (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
山口登士也 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
Application Number:
JP2009/051046
Publication Date:
July 29, 2010
Filing Date:
January 23, 2009
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA (1 Toyota-cho, Toyota-shi Aichi, 71, 47185, JP)
トヨタ自動車株式会社 (, 〒71 愛知県豊田市トヨタ町１番地 Aichi, , 47185, JP)
SUGIYAMA, Masaki (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
杉山昌揮 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
YAMAGUCHI, Toshiya (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
トヨタ自動車株式会社 (, 〒71 愛知県豊田市トヨタ町１番地 Aichi, , 47185, JP)
SUGIYAMA, Masaki (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
杉山昌揮 (, 〒71 愛知県豊田市トヨタ町１番地 トヨタ自動車株式会社内 Aichi, , 47185, JP)
YAMAGUCHI, Toshiya (, 1 Toyota-cho, Toyota-sh, Aichi 71, 47185, JP)
International Classes:
H01F41/02; B22F1/02; B22F3/24; H01F1/24; H01F27/255;
Attorney, Agent or Firm:
HIRAKI, Yusuke et al. (Kamiya-cho MT Bldg. 19F, 3-20 Toranomon 4-chome,Minato-k, Tokyo 01, 10500, JP)
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Claims:
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