Title:
NEODYMIUM-IRON-BORON MAGNET AS WELL AS PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2023/124688
Kind Code:
A1
Abstract:
The present invention provides a neodymium-iron-boron magnet as well as a preparation method therefor and the use thereof. The magnet comprises main-phase grains having an R2(Fe,M)14B structure, and grain boundary phases. The grain boundary phases comprise two-grain grain boundaries between every two main-phase grains and triangular grain boundaries consisting of gaps among every three or more main-phase grains, wherein M comprises Cu, Ga, and/or Al, and R is at least one rare earth element including Nd. By means of regulating the component proportions of elements Cu, Ga, Al, etc, a distribution rule thereof in a magnet, and the grain sizes of grains, a magnet with high Br and Hcj can be obtained.
Inventors:
YU YONGJIANG (CN)
LIU LEI (CN)
AN ZHONGXIN (CN)
FANG XIAOGUANG (CN)
GENG GUOQIANG (CN)
LIU LEI (CN)
AN ZHONGXIN (CN)
FANG XIAOGUANG (CN)
GENG GUOQIANG (CN)
Application Number:
PCT/CN2022/134600
Publication Date:
July 06, 2023
Filing Date:
November 28, 2022
Export Citation:
Assignee:
YANTAI ZHENGHAI MAGNETIC MAT CO LTD (CN)
International Classes:
H01F1/057; H01F41/02
Foreign References:
| CN114284018A | 2022-04-05 | |||
| CN102693812A | 2012-09-26 | |||
| CN103282976A | 2013-09-04 | |||
| CN109585112A | 2019-04-05 | |||
| CN107424701A | 2017-12-01 | |||
| CN107369512A | 2017-11-21 | |||
| JP2017011086A | 2017-01-12 |
Attorney, Agent or Firm:
BEIJING ORIGINTELLIGENCE IP LAW FIRM (CN)
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