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Title:
AMORPHOUS DUST CORE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2015185758
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an amorphous dust core ensuring high density and high permeability, and to provide a production method therefor.SOLUTION: In an amorphous dust core produced by compression molding amorphous metal powder having a surface coated with an insulating layer, the amorphous metal powder is secondary particles composed of at least two kinds of amorphous metal powder having different average particle sizes and particle size distribution. The secondary particle consists of a center particle of amorphous metal powder having a large average particle size, and amorphous metal powder having an average particle size smaller than that of the center particle, and adhering to the surface thereof. The amorphous dust core has a density of 5.6 or more, and a relative permeability of 60 or more.

Inventors:
KAMBE SHOGO
ODA TAKAYUKI
SHIMAZU EIICHIRO
MIYAZAKI SHINJI
Application Number:
JP2014062230A
Publication Date:
October 22, 2015
Filing Date:
March 25, 2014
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD
International Classes:
H01F1/153; B22F1/00; B22F1/02; B22F3/00; C22C33/02; H01F1/24; H01F27/24; H01F27/255
Domestic Patent References:
JP2012077363A2012-04-19
JP2013213247A2013-10-17
JPH04254305A1992-09-09
JP2012044156A2012-03-01
Foreign References:
WO2006022262A12006-03-02
WO2005015581A12005-02-17
Attorney, Agent or Firm:
Wake Manipulation
Wake Hikari



 
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