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Patent Searching and Data


Title:
DUST CORE AND ITS MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2002151317
Kind Code:
A
Abstract:

To provide a dust core which has a low coercive force and causes little core loss, and to provide a method of manufacturing the core.

The dust core is manufactured by mixing the powder of a metal-glass alloy containing Fe, Al, and at least one or more kinds of elements Q, selected from among P, C, Si, and B and having an amorphous phase as the main phase with an insulating material and molding the mixture by using a supercooling liquid, having a temperature interval ΔTx (ΔTx=Tx-Tg (where Tx and Tg respectively denotes the crystallization starting temperature and glass transition temperature)) of ≥20 K. The method of manufacturing the core includes a powder manufacturing step of manufacturing the powder of the metal-glass alloy, a molding step of forming the precursor of the core by mixing the insulating material with the powder of the alloy and compression- molding the mixture, and a heat-treating step of removing the internal stresses of the precursor by heat-treating the precursor at a temperature between (Tg-170) K or higher and (Tg) K or lower.


Inventors:
YOSHIDA SHOJI
KENMOTSU HIDETAKA
MIZUSHIMA TAKAO
KOSHIBA HISATO
Application Number:
JP2001081377A
Publication Date:
May 24, 2002
Filing Date:
March 21, 2001
Export Citation:
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Assignee:
ALPS ELECTRIC CO LTD
International Classes:
B22F3/00; B22F3/02; B22F3/24; C22C38/00; C22C45/02; H01F1/147; H01F1/153; H01F1/22; H01F27/24; H01F27/255; H01F41/02; (IPC1-7): H01F1/22; B22F3/00; B22F3/02; B22F3/24; C22C38/00; C22C45/02; H01F1/147; H01F27/24; H01F27/255; H01F41/02
Attorney, Agent or Firm:
Masatake Shiga (6 people outside)