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/2011/125589

Kind Code:

A1

Abstract:

Disclosed are a permanent magnet and a manufacturing method for the permanent magnet in which V, Mo, Zr, Ta, Ti, W, or Nb contained in an organometallic compound can be segregated to the grain boundaries of a magnet. 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, calcination in hydrogen is carried out by retaining a molded article, formed by powder compacting, in a hydrogen atmosphere for several hours at 200℃-900℃. Afterwards, a permanent magnet is manufactured by sintering. (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.)

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Inventors:

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

Application Number:

PCT/JP2011/057570

Publication Date:

October 13, 2011

Filing Date:

March 28, 2011

Export Citation:

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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:

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

Foreign References:

JP2009259956A	2009-11-05
JP2004250781A	2004-09-09
JP3298219B2	2002-07-02

Other References: