RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING RARE EARTH PERMANENT MAGNET

Title:

RARE EARTH PERMANENT MAGNET AND METHOD FOR PRODUCING RARE EARTH PERMANENT MAGNET

Document Type and Number:

WIPO Patent Application WO/2013/137134

Kind Code:

A1

Abstract:

Provided are: a rare earth permanent magnet enabling the prevention of a decrease in magnet characteristics; and a method for producing a rare earth permanent magnet. A magnet starting material is pulverized into a magnet powder, and a compound (12) is formed by mixing the pulverized magnet powder and a binder. Then, a green sheet (14) is prepared by molding the formed compound (12) into a sheet shape. Then, the molded green sheet (14) is subjected to magnetic field orientation, and furthermore is subjected to calcination processing by means of compressing the green sheet (14) to a pressure higher than atmospheric pressure and holding for a number of hours at 200-900°C in a non-oxidizing atmosphere. Subsequently, a permanent magnet (1) is produced by sintering the green sheet (14) at a firing temperature.

More Like This:

JPS6222414	MANUFACTURE OF CORE
JPS63285909	PERMANENT MAGNET AND MANUFACTURE THEREOF

Inventors:

KUME KATSUYA (JP)
OKUNO TOSHIAKI (JP)
OZEKI IZUMI (JP)
OMURE TOMOHIRO (JP)
OZAKI TAKASHI (JP)
TAIHAKU KEISUKE (JP)
YAMAMOTO TAKASHI (JP)

Application Number:

PCT/JP2013/056433

Publication Date:

September 19, 2013

Filing Date:

March 08, 2013

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NITTO DENKO CORP (JP)

International Classes:

H01F41/02; B22F1/10; B22F3/00; B22F3/02; B22F3/10; B22F3/14; B22F3/15; B22F9/04; C22C33/02; H01F1/057; H01F1/08; H01F1/113; C22C38/00

Domestic Patent References:

WO2009116539A1	2009-09-24
WO2012176509A1	2012-12-27

Foreign References:

JP2004281873A	2004-10-07
JPH09283358A	1997-10-31
JP2005203555A	2005-07-28
JP2004146713A	2004-05-20
JP2002164203A	2002-06-07
JPH06116605A	1994-04-26
JPH02266503A	1990-10-31

Other References: