Title:
FERROMAGNETIC PARTICLE POWDER, METHOD FOR PRODUCING SAME, ANISOTROPIC MAGNET, AND BONDED MAGNET
Document Type and Number:
WIPO Patent Application WO/2012/039461
Kind Code:
A1
Abstract:
The present invention is a ferromagnetic particle powder constituted of 70% or more Fe16N2compound phase according to the Mossbauer spectrum. Specifically, the present invention relates to a ferromagnetic particle powder characterized by containing one or more metal elements (X) selected from Mn, Ni, Ti, Ga, Al, Ge, Zn, Pt, and Si in a molar ratio to Fe of 0.04 - 25% and having BHmax for the ferromagnetic particle powder of 5 MGOe. The present invention further relates to a method for producing the same and an anisotropic magnet and bonded magnet in which this ferromagnetic particle powder is magnetically oriented. This ferromagnetic particle powder can be produced industrially and is a Fe16N2 particle powder that contains a different metal element having a large BHmax.
Inventors:
TAKAHASHI MIGAKU (JP)
OGAWA TOMOYUKI (JP)
OGATA YASUNOBU (JP)
SAKUMA AKIMASA (JP)
KOBAYASHI NAOYA (JP)
POLWATTA GALLAGE CHAMMIKA RUWAN (JP)
KOHARA KAORI (JP)
OGAWA TOMOYUKI (JP)
OGATA YASUNOBU (JP)
SAKUMA AKIMASA (JP)
KOBAYASHI NAOYA (JP)
POLWATTA GALLAGE CHAMMIKA RUWAN (JP)
KOHARA KAORI (JP)
Application Number:
PCT/JP2011/071636
Publication Date:
March 29, 2012
Filing Date:
September 22, 2011
Export Citation:
Assignee:
TODA KOGYO CORP (JP)
UNIV TOHOKU (JP)
TAKAHASHI MIGAKU (JP)
OGAWA TOMOYUKI (JP)
OGATA YASUNOBU (JP)
SAKUMA AKIMASA (JP)
KOBAYASHI NAOYA (JP)
POLWATTA GALLAGE CHAMMIKA RUWAN (JP)
KOHARA KAORI (JP)
UNIV TOHOKU (JP)
TAKAHASHI MIGAKU (JP)
OGAWA TOMOYUKI (JP)
OGATA YASUNOBU (JP)
SAKUMA AKIMASA (JP)
KOBAYASHI NAOYA (JP)
POLWATTA GALLAGE CHAMMIKA RUWAN (JP)
KOHARA KAORI (JP)
International Classes:
H01F1/06; B22F1/16; B22F9/22; C01B21/06; C22C29/16; H01F1/08
Foreign References:
| JPH11340023A | 1999-12-10 | |||
| JP2000277311A | 2000-10-06 | |||
| JP2009084115A | 2009-04-23 | |||
| JP2008108943A | 2008-05-08 | |||
| JP2008103510A | 2008-05-01 | |||
| JP2007335592A | 2007-12-27 | |||
| JP2007258427A | 2007-10-04 | |||
| JP2007134614A | 2007-05-31 | |||
| JP2007036027A | 2007-02-08 | |||
| JP2009249682A | 2009-10-29 |
Other References:
TAKESHI HATTORI ET AL.: "Magnetic Properties of Fe16N2 Fine Particles", JOURNAL OF MAGNETICS SOCIETY OF JAPAN, vol. 25, no. 4-2, 2001, pages 927 - 930, XP009114659
KEN'ICHI SHIBATA ET AL.: "Magnetic Moment and Anisotropy of Iron Nitride Fe16N2 Nanoparticles", JOURNALOF THE MAGNETIC SOCIETY OF JAPAN, vol. 30, no. 5, 2006, pages 501 - 504, XP008161320
AKIRA NAGATOMI ET AL.: "Synthesis of Iron Nitrides FexN (x : 2, 2-3, 4, 16/2) by Nitrogenizing a-Fe in Ammonia Gas, and Magnetic Properties of The Bulk Sample of Fe16N2", JOURNAL OF THE JAPAN SOCIETY OF POWDER AND POWDER METALLURGY, vol. 46, no. 2, February 1999 (1999-02-01), pages 151 - 155, XP055123622
M. TAKAHASHI; H. SHOJI; H. TAKAHASHI; H. NASHI; T. WAKIYAMA; M. DOI; M. MATSUI, J. APPL. PHYS., vol. 76, 1994, pages 6642 - 6647
TAKAHASHI, M. KATOU; H. SHOJI; M. TAKAHASHI, J. MAGN. MAGN. MATER., vol. 232, 2001, pages 18 - 26
See also references of EP 2620955A4
KEN'ICHI SHIBATA ET AL.: "Magnetic Moment and Anisotropy of Iron Nitride Fe16N2 Nanoparticles", JOURNALOF THE MAGNETIC SOCIETY OF JAPAN, vol. 30, no. 5, 2006, pages 501 - 504, XP008161320
AKIRA NAGATOMI ET AL.: "Synthesis of Iron Nitrides FexN (x : 2, 2-3, 4, 16/2) by Nitrogenizing a-Fe in Ammonia Gas, and Magnetic Properties of The Bulk Sample of Fe16N2", JOURNAL OF THE JAPAN SOCIETY OF POWDER AND POWDER METALLURGY, vol. 46, no. 2, February 1999 (1999-02-01), pages 151 - 155, XP055123622
M. TAKAHASHI; H. SHOJI; H. TAKAHASHI; H. NASHI; T. WAKIYAMA; M. DOI; M. MATSUI, J. APPL. PHYS., vol. 76, 1994, pages 6642 - 6647
TAKAHASHI, M. KATOU; H. SHOJI; M. TAKAHASHI, J. MAGN. MAGN. MATER., vol. 232, 2001, pages 18 - 26
See also references of EP 2620955A4
Attorney, Agent or Firm:
OKADA, KAZUHIKO (JP)
Kazuhiko Okada (JP)
Kazuhiko Okada (JP)
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Claims: