NDFEB MAGNET, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Title:

NDFEB MAGNET, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2021/238867

Kind Code:

A1

Abstract:

A NdFeB magnet, a preparation method therefor, and an application thereof. The NdFeB magnet is represented by a chemical formula R1-R2-Fe-M-B, and has a composite structure of a high-coercivity region and a high-remanence region, wherein R1 is a rare earth element containing at least Nd, R2 is a heavy rare earth element containing at least Dy and/or Tb, and M is a transition metal element containing at least Co. A small amount of Dy/Tb can be used in the magnet, so as to greatly improve resistance to high-temperature demagnetization of the magnet and inhibit reduction of magnetic flux of the magnet. The magnet is applicable to an embedded high-speed motor. The method for preparing the magnet can further greatly improve the material utilization and the production efficiency, and has mass production feasibility.

Inventors:

SHI BINGQIANG (CN)
LIU LEI (CN)
MA DAN (CN)
SU YUNTING (CN)

Application Number:

PCT/CN2021/095528

Publication Date:

December 02, 2021

Filing Date:

May 24, 2021

Export Citation:

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Assignee:

YANTAI ZHENGHAI MAGNETIC MAT CO LTD (CN)

International Classes:

H01F1/057; C22C38/10; H01F41/02

Foreign References:

CN111653404A	2020-09-11
CN101939804A	2011-01-05
CN105374486A	2016-03-02
US20040000359A1	2004-01-01
CN106205992A	2016-12-07
CN105489369A	2016-04-13
CN202010464304A	2020-05-27
CN101939804A	2011-01-05

Other References: