Title:
磁心用粉末及び圧粉磁心並びにそれらの製造方法
Document Type and Number:
Japanese Patent JP4589374
Kind Code:
B2
Abstract:
A method for producing a powder for a magnetic core, in which an alkoxide film formation step and a silicone resin film formation step are carried out to form an insulation film composed of an alkoxide film and a silicone resin film on the surface of a pure iron powder, wherein the alkoxide film formation step comprises immersing a pure iron powder in an alkoxide-containing solution which is prepared by mixing a Si alkoxide having at least one organic group having a polar group comprising at least one of N, P, S and O atoms and an Al alkoxide with a dehydrated organic solvent, and drying to remove the dehydrated organic solvent, thereby forming an alkoxide film comprising an Al-Si-O type composite oxide on the surface of the pure iron powder; and the silicone resin film formation step comprises immersing the pure iron powder having the alkoxide film formed thereon in a silicone resin-containing solution which is prepared by mixing a silicone resin with an organic solvent, and drying to remove the organic solvent, thereby forming a silicone resin film on the alkoxide film.
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Inventors:
Shin Tajima
Masaaki Tani
Daisuke Okamoto
Eisuke Hoshina
Hidefumi Kishimoto
Daisuke Ichizaki
Masaaki Tani
Daisuke Okamoto
Eisuke Hoshina
Hidefumi Kishimoto
Daisuke Ichizaki
Application Number:
JP2007286314A
Publication Date:
December 01, 2010
Filing Date:
November 02, 2007
Export Citation:
Assignee:
Toyota Central R & D Labs.
TOYOTA JIDOSHA KABUSHIKI KAISHA
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
H01F1/24; B22F1/102; B22F3/00; C21D6/00; H01F1/33; H01F41/02
Domestic Patent References:
| JP2005191187A | ||||
| JP2004288983A | ||||
| JP2006128663A | ||||
| JP2008088505A |
Foreign References:
| WO2007077689A1 |
Attorney, Agent or Firm:
Patent Business Corporation Aichi International Patent Office