Title:
COMPRESSED SOFT MAGNETIC POWDER BODY
Document Type and Number:
WIPO Patent Application WO/2013/108643
Kind Code:
A1
Abstract:
Provided is a compressed soft magnetic powder body which does not suffer from an increase in iron loss and which exhibits excellent magnetic characteristics. A compressed soft magnetic powder body produced by applying insulating coatings to the surfaces of metal powder particles which comprise iron powder particles as the main component and then compression-molding the resulting metal powder particles, wherein an oxidation -affected layer that contains iron oxides (11, 12, 13) and a layer-shaped Si oxide (14) is present in each iron-particle interface (10) which is the boundary between iron powder particles, said oxidation-affected layer being formed by heat treatment conducted in an oxidizing atmosphere after the compression molding.
Inventors:
NISHI KAZUYA (JP)
AONO YASUHISA (JP)
SOUMA KENICHI (JP)
IMAGAWA TAKAO (JP)
HOJO HIROFUMI
KAMIJO TOMOTSUNA
OHWAKI TAKESHI
MITANI HIROYUKI
AONO YASUHISA (JP)
SOUMA KENICHI (JP)
IMAGAWA TAKAO (JP)
HOJO HIROFUMI
KAMIJO TOMOTSUNA
OHWAKI TAKESHI
MITANI HIROYUKI
Application Number:
PCT/JP2013/050033
Publication Date:
July 25, 2013
Filing Date:
January 07, 2013
Export Citation:
Assignee:
HITACHI IND EQUIPMENT SYS (JP)
KOBE STEEL LTD (JP)
KOBE STEEL LTD (JP)
International Classes:
H01F1/24; B22F1/102; B22F1/16; B22F3/00; B22F3/24; H01F27/255; H01F41/02
Domestic Patent References:
| WO2008032503A1 | 2008-03-20 | |||
| WO2006006545A1 | 2006-01-19 | |||
| WO2009078453A1 | 2009-06-25 | |||
| WO2012001943A1 | 2012-01-05 | |||
| WO2009096138A1 | 2009-08-06 |
Foreign References:
| JP2011233827A | 2011-11-17 | |||
| JP2009185312A | 2009-08-20 |
Attorney, Agent or Firm:
POLAIRE I. P. C. (JP)
Polaire Intellectual Property Corporation (JP)
Polaire Intellectual Property Corporation (JP)
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Claims: