Title:
NEODYMIUM-IRON-BORON MAGNET MATERIAL, PREPARATION THEREFOR, AND APPLICATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/207019
Kind Code:
A1
Abstract:
Disclosed are a neodymium-iron-boron magnet material, a preparation therefor, and an application thereof. The neodymium-iron-boron magnet material comprises the following components in weight percent: R: 28.00-32.00 wt. %, the R being a rare earth element, Al: 0.00-1.00 wt. %, Cu: 0.12-0.50 wt. %, B: 0.85-1.10 wt. %, and the balance being Fe; wt. % indicates the weight percent in the neodymium-iron-boron magnet material; the ratio of the volume of a Nd-O phase having an FCC-type crystal structure in an intergranular triangular region of the neodymium-iron-boron magnet material to the volume of a grain boundary phase of the neodymium-iron-boron magnet material is within 20%. According to the present invention, by reducing the proportion of the Nd-O phase having an FCC-type crystal structure, the demagnetization coupling capability of the grain boundary phase is enhanced, and the consistency of intrinsic coercive force of a magnet is improved.
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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/CN2022/129741
Publication Date:
November 02, 2023
Filing Date:
November 04, 2022
Export Citation:
Assignee:
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
International Classes:
H01F1/057
Domestic Patent References:
| WO2014054163A1 | 2014-04-10 |
Foreign References:
| CN104575901A | 2015-04-29 | |||
| CN105206412A | 2015-12-30 | |||
| CN104380397A | 2015-02-25 | |||
| CN101652821A | 2010-02-17 | |||
| CN102667978A | 2012-09-12 |
Other References:
FUKAGAWA, T.: "The Effect of Oxygen on the Surface Coercivity of Nd-coated Nd–Fe–B", JOURNAL OF APPLIED PHYSICS, vol. 105, 9 March 2009 (2009-03-09), XP012124305, DOI: 10.1063/1.3073941
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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