Title:
MAGNETIC MATERIAL AND MOTOR OBTAINED USING SAME
Document Type and Number:
WIPO Patent Application WO/2011/040126
Kind Code:
A1
Abstract:
Disclosed is a magnetic material in which 50% by volume of the magnetic particles are accounted for by the main phase of the magnet, the main phase having a Curie temperature (Curie point) of 200ºC or higher, a saturation magnetic-flux density at around 20ºC of 1.0 T (tesla) or higher, and a coercive force of 10 kOe or higher, the crystal structure of the main phase being stable up to 200ºC, and in which phases other than the main phase which are present at the grain boundaries or grain surfaces have stabilized or improved the magnetic properties. This magnetic material comprises two ferromagnetic phases, i.e., a ferromagnetic compound which is composed of fluorine, iron, and one or more rare-earth elements including yttrium and ferromagnetic iron which contains fluorine, carbon, nitrogen, hydrogen, or boron. A fluoride and an oxyfluoride have been formed at some of the boundaries or surfaces of the grains of the ferromagnetic phases.
Inventors:
KOMURO MATAHIRO (JP)
SATSU YUICHI (JP)
SUZUKI HIROYUKI (JP)
SATSU YUICHI (JP)
SUZUKI HIROYUKI (JP)
Application Number:
PCT/JP2010/063612
Publication Date:
April 07, 2011
Filing Date:
August 11, 2010
Export Citation:
Assignee:
HITACHI LTD (JP)
KOMURO MATAHIRO (JP)
SATSU YUICHI (JP)
SUZUKI HIROYUKI (JP)
KOMURO MATAHIRO (JP)
SATSU YUICHI (JP)
SUZUKI HIROYUKI (JP)
International Classes:
H01F1/053; C01G49/00; H02K1/27; H02K15/03
Foreign References:
| JP2005209669A | 2005-08-04 | |||
| JP2007194599A | 2007-08-02 | |||
| JPH09186010A | 1997-07-15 | |||
| JP2001093713A | 2001-04-06 |
Attorney, Agent or Firm:
ASAMURA PATENT OFFICE, p. c. (JP)
Patent business corporation Asamura patent firm (JP)
Patent business corporation Asamura patent firm (JP)
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