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Title:
SURFACE TREATED RARE EARTH MAGNETIC POWDER, BONDED MAGNET RESIN COMPOSITION THAT INCLUDES THE RARE EARTH MAGNETIC POWDER, AND BONDED MAGNET
Document Type and Number:
WIPO Patent Application WO/2010/090229
Kind Code:
A1
Abstract:
Disclosed are a surface treated rare earth magnetic powder, a bonded magnet resin composition that is composed of the rare earth magnetic powder and a resin, and a bonded magnet that includes the rare earth magnetic powder. The surface treated rare earth magnetic powder is a rare earth magnetic powder wherein the surfaces of rare earth magnetic particles are coated with a first layer composed of a phosphorus compound, and the surface of the first layer is coated with a second layer that is a composite coating composed of a silicon compound and a phosphorus compound. The Fe elution rate of the rare earth magnetic powder is 10 mg/L or less.

Inventors:
SHIGEOKA, Kuniyoshi (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
重岡郁美 (〒52 広島県大竹市明治新開1番4戸田工業株式会社大竹創造センター内 Hiroshima, 〒7390652, JP)
Application Number:
JP2010/051530
Publication Date:
August 12, 2010
Filing Date:
February 03, 2010
Export Citation:
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Assignee:
TODA KOGYO CORPORATION (1-4 Meijishinkai, Otake-shi Hiroshima, 52, 〒7390652, JP)
戸田工業株式会社 (〒52 広島県大竹市明治新開1番4 Hiroshima, 〒7390652, JP)
SHIGEOKA, Kuniyoshi (Otake Research & Development Center 1-4, Meijishinkai, Otake-sh, Hiroshima 52, 〒7390652, JP)
International Classes:
B22F1/02; B22F1/00; B22F3/00; H01F1/053; H01F1/08
Foreign References:
JP2006169618A2006-06-29
JP2007048951A2007-02-22
JP2008263040A2008-10-30
JP2006049863A2006-02-16
JPH08111306A1996-04-30
JP2000260616A2000-09-22
JP2000160205A2000-06-13
JP2000309802A2000-11-07
JP2005286315A2005-10-13
JP2002008911A2002-01-11
JP2002043109A2002-02-08
Other References:
'Guide Book of Testing Methods for Bonded Magnets', JAPAN ASSOCIATE OF BONDED MAGNET INDUSTRIES article 'Corrosion Test Method for Bonded Magnets'
Attorney, Agent or Firm:
OKADA, Kazuhiko (Okada & Associates, 6F Kudan Kangyo Bldg., 10-1, Kudankita 1-chome, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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