MODIFIED SINTERED NEODYMIUM-IRON-BORON PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR - ZHEJIANG DONGYANG DMEGC RARE EARTH MAGNET CO LTD

Title:

MODIFIED SINTERED NEODYMIUM-IRON-BORON PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2024/001041

Kind Code:

A1

Abstract:

The present invention provides a modified sintered neodymium-iron-boron permanent magnet material and a preparation method therefor. The modified sintered neodymium-iron-boron permanent magnet material comprises a first alloy. The first alloy has a chemical formula as shown in formula (I): (Pr0.25Nd0.75)a(LRE)bTMcFe100%-a-b-c-dBd (I), wherein LRE is a rare earth element; LRE is selected from one or more of the elements Gd, Y and Ce, and at least contains the element Gd; TM is selected from one or more of the elements Al, Cu, Co, Ga, Nb, Zr and Ti; and a is 5-20%, b is 13-28%, c is 0.4-5.5%, and d is 0.9-1%. The modified sintered neodymium-iron-boron permanent magnet material provided in the present application has a maximum magnetic energy product of 5-30 MGOe, a residual magnetism of 6-11 kGs, and an intrinsic coercive force in the range of 5-11 kOe, and also has good high-temperature resistance and a low cost.

Inventors:

AN XIAOXIN (CN)
HAO ZHONGBIN (CN)
LIU XIAOLANG (CN)
HONG QUNFENG (CN)

Application Number:

PCT/CN2022/135691

Publication Date:

January 04, 2024

Filing Date:

November 30, 2022

Export Citation:

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Assignee:

ZHEJIANG DONGYANG DMEGC RARE EARTH MAGNET CO LTD (CN)

International Classes:

H01F1/057; H01F41/02

Domestic Patent References:

WO2021223436A1	2021-11-11
WO2021258280A1	2021-12-30

Foreign References:

CN105225781A	2016-01-06
CN105845425A	2016-08-10
CN108364739A	2018-08-03
CN106601407A	2017-04-26
CN101982855A	2011-03-02
CN103824668A	2014-05-28
JP2020107888A	2020-07-09
CN202210761631A	2022-06-30

Other References: