Title:
NDFEB MAGNET MATERIAL, AND RAW MATERIAL COMPOSITION THEREOF, PREPARATION METHOD THEREFOR, AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/218698
Kind Code:
A1
Abstract:
Disclosed in the present invention are an NdFeB magnet material, and a raw material composition thereof, a preparation method therefor, and application thereof. A raw material composition of NdFeB magnet material A, containing: 29.5-32.5wt% of R, R being a rare earth element and comprising rare earth metal R1 for smelting and rare earth metal R2 for grain boundary diffusion, R1 comprising Nd, Ho, and Dy and/or Tb, and R2 comprising Dy and/or Tb; 0-0.5wt% of Co; 0.9-1.05wt% of B; 0-0.35wt% of Cu; 0-0.35wt% of Ga; 0-0.5wt% of Al; 0.05-0.45wt% of X, X comprising one or more of Ti, Nb, Zr, Hf, V, Mo, W, Ta, and Cr; and 65-70wt% of Fe. The raw material composition of NdFeB magnet material A does not contain Gd. The NdFeB magnet material of the present invention has high remanence, high coercivity, and good high-temperature performance.
Inventors:
HUANG QINGFANG (CN)
WANG JINLEI (CN)
LI GUOFEI (CN)
TANG ZHIHUI (CN)
HUANG JIAYING (CN)
WANG JINLEI (CN)
LI GUOFEI (CN)
TANG ZHIHUI (CN)
HUANG JIAYING (CN)
Application Number:
PCT/CN2021/088304
Publication Date:
November 04, 2021
Filing Date:
April 20, 2021
Export Citation:
Assignee:
XIAMEN TUNGSTEN CO LTD (CN)
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
International Classes:
H01F1/057; C22C33/02; C22C38/00; C22C38/06; C22C38/10; C22C38/12; C22C38/14; C22C38/16; C22C38/20; C22C38/22; C22C38/24; C22C38/32; H01F41/02
Foreign References:
| CN111540557A | 2020-08-14 | |||
| CN110853855A | 2020-02-28 | |||
| CN110619984A | 2019-12-27 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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