Title:
HIGH-PERFORMANCE SINTERED NEODYMIUM-IRON-BORON MAGNET AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/001189
Kind Code:
A1
Abstract:
Disclosed in the present invention are a high-performance sintered neodymium-iron-boron magnet and a preparation method therefor. The magnet is prepared by means of diffusion heat treatment, using R1
mFenBpM2
w as a substrate and the alloy RH
xM1
yBz as a diffusion source. The present invention uses the alloy RH
xM1
yBz as a diffusion source and adopts a detachable material reaction bucket for diffusion, efficiently producing a cost-effective rare earth permanent magnet. This solves the problems of fusion and adhesion between a diffusion source and a substrate in a diffusion process, increases the Hcj of the sintered neodymium-iron-boron magnet, and solves the problem of improving efficiency in a diffusion process. Furthermore, the diffusion source of the present invention can be reused to reduce the production cost of the sintered neodymium-iron-boron magnet and can be applied to a magnet of a large size, and can in particular ensure mass production of a cost-effective sintered neodymium-iron-boron product with a thickness of 8-30 mm in an orientation direction.
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Inventors:
LI ZHIQIANG (CN)
ZHANG TING (CN)
ZHAO NAN (CN)
XUE LINGWEN (CN)
ZHANG TING (CN)
ZHAO NAN (CN)
XUE LINGWEN (CN)
Application Number:
PCT/CN2022/106752
Publication Date:
January 26, 2023
Filing Date:
July 20, 2022
Export Citation:
Assignee:
YANTAI ZHENGHAI MAGNETIC MAT CO LTD (CN)
NANTONG ZHENGHAI MAGNET CO LTD (CN)
NANTONG ZHENGHAI MAGNET CO LTD (CN)
International Classes:
H01F1/057; B22F3/00; C22C38/00; H01F41/02
Foreign References:
| CN113593800A | 2021-11-02 | |||
| CN111636035A | 2020-09-08 | |||
| CN110808158A | 2020-02-18 | |||
| CN107689279A | 2018-02-13 | |||
| JP2018101680A | 2018-06-28 | |||
| CN202110819841A | 2021-07-20 | |||
| CN101707107A | 2010-05-12 | |||
| CN106298219A | 2017-01-04 | |||
| CN107731437A | 2018-02-23 | |||
| CN105321702A | 2016-02-10 | |||
| CN103003899A | 2013-03-27 |
Attorney, Agent or Firm:
BEIJING ORIGINTELLIGENCE IP LAW FIRM (CN)
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