PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET

Title:

PERMANENT MAGNET AND MANUFACTURING METHOD FOR PERMANENT MAGNET

Document Type and Number:

WIPO Patent Application WO/2011/125583

Kind Code:

A1

Abstract:

Disclosed are a permanent magnet and a manufacturing method for the permanent magnet in which gaps are not formed between the main phase and the grain-boundary phase of the magnet after sintering, and in which the entire magnet can be densely sintered. An organometallic compound solution, to which an organometallic compound represented by the formula M-(OR)x has been added, is added to a fine 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 grains undergo calcination in hydrogen by being retained in a hydrogen atmosphere for several hours at 200℃-900℃. Furthermore, the pulverulent calcined body calcined in the hydrogen undergoes hydrogenation by being retained in a vacuum atmosphere for several hours at 200℃-600℃. (In the formula, M is V, Mo, Zr, Ta, Ti, W, or Nb. R is a substituent group comprising a hydrocarbon, and can be a straight chain or a branched chain. x is an arbitrary integer.)

Inventors:

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

Application Number:

PCT/JP2011/057564

Publication Date:

October 13, 2011

Filing Date:

March 28, 2011

Export Citation:

Click for automatic bibliography generation Help

Assignee:

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

International Classes:

H01F1/08; B22F1/16; B22F3/00; B22F3/10; H01F1/053; H01F41/02; H02K15/03; C22C33/02; C22C38/00

Foreign References:

JP2009259956A	2009-11-05
JPH07211570A	1995-08-11
JPH10214711A	1998-08-11
JP2004250781A	2004-09-09
JP3298219B2	2002-07-02

Other References: