Title:
ND-BASED SINTERED MAGNET AND MANUFACTURING METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2010/064578
Kind Code:
A1
Abstract:
Provided is an Nd-based sintered magnet for a permanent magnet rotating machine and suitable for a permanent magnet rotating machine, given that the residual magnetic flux density of the permanent magnet will not decrease, coercivity will be high, the coercivity at the edge parts of the permanent magnet in particular will be high, and the magnet is not likely to be demagnetized even at high temperatures.
Inventors:
MIYATA KOJI (JP)
MINOWA TAKEHISA (JP)
NAKAMURA HAJIME (JP)
HIROTA KOICHI (JP)
HONSHIMA MASAKATSU (JP)
MINOWA TAKEHISA (JP)
NAKAMURA HAJIME (JP)
HIROTA KOICHI (JP)
HONSHIMA MASAKATSU (JP)
Application Number:
PCT/JP2009/070010
Publication Date:
June 10, 2010
Filing Date:
November 27, 2009
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
MIYATA KOJI (JP)
MINOWA TAKEHISA (JP)
NAKAMURA HAJIME (JP)
HIROTA KOICHI (JP)
HONSHIMA MASAKATSU (JP)
MIYATA KOJI (JP)
MINOWA TAKEHISA (JP)
NAKAMURA HAJIME (JP)
HIROTA KOICHI (JP)
HONSHIMA MASAKATSU (JP)
International Classes:
H01F41/02; H01F1/08; H01F7/02; H02K1/27; H02K15/03
Domestic Patent References:
| WO2008075709A1 | 2008-06-26 | |||
| WO2003079516A1 | 2003-09-25 | |||
| WO2006043348A1 | 2006-04-27 |
Foreign References:
| JP2008061333A | 2008-03-13 | |||
| JP2006261433A | 2006-09-28 | |||
| JP2009254092A | 2009-10-29 | |||
| JPH0531807B2 | 1993-05-13 | |||
| JPH0521218A | 1993-01-29 |
Other References:
K. D. DURST; H. KRONMULLER: "THE COERCIVE FIELD OF SINTERED AND MELT-SPUN NdFeB MAGNETS", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 68, 1987, pages 63 - 75, XP024487191, DOI: doi:10.1016/0304-8853(87)90097-7
K. T. PARK; K. HIRAGA; M. SAGAWA: "Effect of Metal-Coating and Consecutive Heat Treatment on Coercivity of Thin Nd-Fe-B Sintered Magnets", PROCEEDINGS OF THE SIXTEEN INTERNATIONAL WORKSHOP ON RARE-EARTH MAGNETS AND THEIR APPLICATIONS, 2000, pages 257, XP008130311
K. MACHIDA; H. KAWASAKI; S. SUZUKI; M. ITO; T. HORIKAWA: "Grain Boundary Tailoring of Nd-Fe-B Sintered Magnets and Their Magnetic Properties", PROCEEDINGS OF THE 2004 SPRING MEETING OF THE POWDER & POWDER METALLURGY SOCIETY, pages 202
See also references of EP 2254131A4
K. T. PARK; K. HIRAGA; M. SAGAWA: "Effect of Metal-Coating and Consecutive Heat Treatment on Coercivity of Thin Nd-Fe-B Sintered Magnets", PROCEEDINGS OF THE SIXTEEN INTERNATIONAL WORKSHOP ON RARE-EARTH MAGNETS AND THEIR APPLICATIONS, 2000, pages 257, XP008130311
K. MACHIDA; H. KAWASAKI; S. SUZUKI; M. ITO; T. HORIKAWA: "Grain Boundary Tailoring of Nd-Fe-B Sintered Magnets and Their Magnetic Properties", PROCEEDINGS OF THE 2004 SPRING MEETING OF THE POWDER & POWDER METALLURGY SOCIETY, pages 202
See also references of EP 2254131A4
Attorney, Agent or Firm:
KOJIMA TAKASHI (JP)
Takashi Kojima (JP)
Takashi Kojima (JP)
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