Title:
NEODYMIUM-IRON-BORON MAGNET MATERIAL AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/207020
Kind Code:
A1
Abstract:
Disclosed in the present invention are a neodymium-iron-boron magnet material and a preparation method therefor and an application thereof. The neodymium-iron-boron magnet material of the present invention comprises a nanocrystalline Cu-rich phase located in an intergranular triangular area, the element composition of the nanocrystalline Cu-rich phase and the atomic ratio of the nanocrystalline Cu-rich phase being Tm:Re:Cu:Ga=(1-20):(20-55):(25-70):(1-15), and the volume ratio of the nanocrystalline Cu-rich phase to the intergranular triangular area being 4-12%, wherein Tm comprises Fe and/or Co, and Re is a rare earth element. According to the neodymium-iron-boron magnet material of the present invention, the intrinsic coercive force can be improved when heavy rare earth is not used or rarely used, the cost is reduced, and meanwhile, relatively high residual magnetism, magnetic energy product and squareness performance are kept.
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Inventors:
MOU WEIGUO (CN)
WANG CHEN (CN)
HUANG ZHIGAO (CN)
FU GANG (CN)
XU DEQIN (CN)
WANG CHEN (CN)
HUANG ZHIGAO (CN)
FU GANG (CN)
XU DEQIN (CN)
Application Number:
PCT/CN2022/129742
Publication Date:
November 02, 2023
Filing Date:
November 04, 2022
Export Citation:
Assignee:
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
International Classes:
H01F1/053; C22C38/16
Foreign References:
| CN104674115A | 2015-06-03 | |||
| CN111243809A | 2020-06-05 | |||
| CN107275025A | 2017-10-20 | |||
| CN106653268A | 2017-05-10 | |||
| CN101542644A | 2009-09-23 | |||
| JP2014150119A | 2014-08-21 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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