PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET

WIPO Patent Application WO/2011/125595

A1

Disclosed are a permanent magnet and a manufacturing method for the permanent magnet in which the grain growth of magnet grains having a single-domain particle is inhibited during sintering, and in which the magnetic properties are improved. An organometallic compound solution, to which an organometallic compound represented by the formula M-(OR)x has been added, is added to a powder of a pulverized neodymium magnet, and the organometallic compound is uniformly deposited on the surface of the neodymium magnet grains. Afterwards, the dried magnet powder is calcined by plasma heating, and a permanent magnet (1) is manufactured by sintering the calcined pulvulerent calcined body after the formation thereof. (In the formula, M is V, Mo, Zr, Ta, Ti, W, or Nb. R is a substituent group comprising a hydrocarbon, R is a C2-6 alkyl group and can be a straight chain or a branched chain. x is an arbitrary integer.)

OZEKI IZUMI (JP)
KUME KATSUYA (JP)
HIRANO KEISUKE (JP)
OMURE TOMOHIRO (JP)
TAIHAKU KEISUKE (JP)
OZAKI TAKASHI (JP)

PCT/JP2011/057576

October 13, 2011

March 28, 2011

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NITTO DENKO CORP (JP)
OZEKI IZUMI (JP)
KUME KATSUYA (JP)
HIRANO KEISUKE (JP)
OMURE TOMOHIRO (JP)
TAIHAKU KEISUKE (JP)
OZAKI TAKASHI (JP)

H01F41/02; B22F1/00; B22F1/02; C22C33/02; C22C38/00; H01F1/053; H01F1/08

JP2009259956A	2009-11-05
JP2001020065A	2001-01-23
JP2005039089A	2005-02-10
JP2005097697A	2005-04-14
JP2005197299A	2005-07-21
JP2004250781A	2004-09-09
JP3298219B2	2002-07-02

See also references of EP 2503573A4

NEXT INTERNATIONAL (JP)
Patent business corporation NeXT (JP)

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