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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.

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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:
See also references of EP 2394761A4
"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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