SOFT MAGNETIC MATERIAL, PROCESS FOR PRODUCTION OF THE MATERIAL, POWDER COMPRESSED MAGNETIC CORE, AND PROCESS FOR PRODUCTION OF THE MAGNETIC CORE

Title:

SOFT MAGNETIC MATERIAL, PROCESS FOR PRODUCTION OF THE MATERIAL, POWDER COMPRESSED MAGNETIC CORE, AND PROCESS FOR PRODUCTION OF THE MAGNETIC CORE

Document Type and Number:

WIPO Patent Application WO/2007/015378

Kind Code:

A1

Abstract:

Disclosed is a soft magnetic material comprising multiple composite magnetic particles (40). Each of the composite magnetic particles (40) has a magnetic metal particle (10) containing iron, a lower coat film (20) surrounding the surface of the magnetic metal particle (10) and containing a non-iron metal, and an insulating top coat film (30) surrounding the surface of the lower coat film (20) and containing an inorganic compound. The inorganic compound contains at least one element selected from oxygen and carbon. The affinity of the non-iron metal for at least one selected from oxygen and carbon is larger than that of iron for at least one selected from oxygen and carbon. The diffusion coefficient of at least one selected from oxygen and carbon in the non-iron metal is lower than that in iron. Utilizing this constitution, a soft magnetic material having a desired magnetic property, a process for production of a soft magnetic material, a powder compressed magnetic core, and a process for production of a powder compressed magnetic core can be provided.

Inventors:

MAEDA TORU (JP)
TOYODA HARUHISA (JP)
IGARASHI NAOTO (JP)
HIROSE KAZUHIRO (JP)
ISHITANI SEIJI (JP)
MORII HIROKO (JP)
HAYASHI KAZUYUKI (JP)

Application Number:

PCT/JP2006/314409

Publication Date:

February 08, 2007

Filing Date:

July 20, 2006

Export Citation:

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Assignee:

SUMITOMO ELECTRIC INDUSTRIES (JP)
TODA KOGYO CORP (JP)
MAEDA TORU (JP)
TOYODA HARUHISA (JP)
IGARASHI NAOTO (JP)
HIROSE KAZUHIRO (JP)
ISHITANI SEIJI (JP)
MORII HIROKO (JP)
HAYASHI KAZUYUKI (JP)

International Classes:

H01F1/33; B22F1/16; B22F1/17; H01F1/24; H01F41/02

Domestic Patent References:

WO2005083725A1	2005-09-09
WO2006035911A1	2006-04-06

Foreign References:

JP2005129716A	2005-05-19
JP2004211129A	2004-07-29
JP2005085967A	2005-03-31
JPH06260319A	1994-09-16
JP2006128521A	2006-05-18
JP2006128663A	2006-05-18
JP2005264192A	2005-09-29
JP2005206880A	2005-08-04
JP2002246219A	2002-08-30
JP2004197115A	2004-07-15
JP2005085967A	2005-03-31
JP2004129716A	2004-04-30

Other References: