COMPOUND FOR RARE EARTH ELEMENT BASED BONDED MAGNET AND BONDED MAGNET USING THE SAME

Title:

COMPOUND FOR RARE EARTH ELEMENT BASED BONDED MAGNET AND BONDED MAGNET USING THE SAME

Document Type and Number:

WIPO Patent Application WO/2003/044811

Kind Code:

A1

Abstract:

A compound for a rare earth element based bonded magnet containing a rare earth element powder and a binding agent, characterized in that the rare earth element powder comprises, in an amount of 2 mass % or more, Ti−containing nanocomposite magnet powdery particles which have a composition represented by the empirical formula: (Fe_1−mT_m)_{100−x−y−z} Q_xR_yM_z wherein T is at least one element selected from the group consisting of Co and Ni, Q is at least one element being selected from the group consisting of B and C and including B, R is at least one rare earth element not including La nor Ce, M is at least one metal element being selected from the group consisting of Ti, Zr and Hf and including Ti, and x, y, z and m respectively satisfy 10 < x ≤ 20 atomic %, 6 ≤ y < 10 atomic %, 0.1 ≤ z ≤ 12 atomic % and 0 ≤ m ≤ 0.5, and have a structure containing two or more types of ferromagnetic crystal phase, wherein a hard magnetic phase has an average crystal grain diameter of 10 nm to 200 nm, a soft magnetic phase has an average crystal grain diameter of 1 nm to 100 nm, and the average crystal grain diameter of the soft magnetic phase is less than that of the hard magnetic phase.

Inventors:

NISHIUCHI TAKESHI (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
MIYOSHI TOSHIO (JP)

Application Number:

PCT/JP2002/012033

Publication Date:

May 30, 2003

Filing Date:

November 18, 2002

Export Citation:

Click for automatic bibliography generation Help

Assignee:

SUMITOMO SPEC METALS (JP)
NISHIUCHI TAKESHI (JP)
KANEKIYO HIROKAZU (JP)
HIROSAWA SATOSHI (JP)
MIYOSHI TOSHIO (JP)

International Classes:

B22F1/00; B22F3/00; C22C1/04; C22C38/00; B22F9/04; C22C38/14; H01F1/053; H01F1/057; H01F1/08; (IPC1-7): H01F1/04; H01F1/08; B22F1/00; C22C38/00

Foreign References:

JPS647502A	1989-01-11
JPH06338407A	1994-12-06
JP2001244107A	2001-09-07
JPH07226312A	1995-08-22
JPH1053844A	1998-02-24

Other References: