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 (JP)
KATAYAMA NOBUHIRO (JP)
KATAYAMA NOBUHIRO (JP)
Application Number:
PCT/JP2010/051530
Publication Date:
August 12, 2010
Filing Date:
February 03, 2010
Export Citation:
Assignee:
TODA KOGYO CORP (JP)
SHIGEOKA KUNIYOSHI (JP)
KATAYAMA NOBUHIRO (JP)
SHIGEOKA KUNIYOSHI (JP)
KATAYAMA NOBUHIRO (JP)
International Classes:
B22F1/16; B22F3/00; H01F1/053; H01F1/08
Foreign References:
| JP2006169618A | 2006-06-29 | |||
| JP2007048951A | 2007-02-22 | |||
| JP2008263040A | 2008-10-30 | |||
| JP2006049863A | 2006-02-16 | |||
| JPH08111306A | 1996-04-30 | |||
| JP2000260616A | 2000-09-22 | |||
| JP2000160205A | 2000-06-13 | |||
| JP2000309802A | 2000-11-07 | |||
| JP2005286315A | 2005-10-13 | |||
| JP2002008911A | 2002-01-11 | |||
| JP2002043109A | 2002-02-08 |
Other References:
"Guide Book of Testing Methods for Bonded Magnets", JAPAN ASSOCIATE OF BONDED MAGNET INDUSTRIES, article "Corrosion Test Method for Bonded Magnets"
See also references of EP 2394761A4
See also references of EP 2394761A4
Attorney, Agent or Firm:
OKADA, KAZUHIKO (JP)
Kazuhiko Okada (JP)
Kazuhiko Okada (JP)
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