Title:
R-T-B MAGNET AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/193819
Kind Code:
A1
Abstract:
Disclosed are an R-T-B magnet and a preparation method therefor. The R-T-B magnet comprises the following components: R ≥29 wt.%, R being a rare earth element and containing Nd, wherein Nd is ≥22 wt.%; 0.2-0.75 wt.% of Ti+Nb; 0.05-0.45 wt.% of Cu; 0.955-1.15 wt.% of B; and 58-69 wt.% of Fe, wherein wt.% is the ratio of the mass of each component to the total mass of the components; and the mass ratio of Ti to Nb is (1-5):1. According to the present invention, the matching relationship among the added elements in the R-T-B magnet is further optimized, and an R-T-B magnet with better magnetic properties such as relatively high residual magnetization, coercivity, and squareness can be prepared by using the formula.
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Inventors:
MOU WEIGUO (CN)
HUANG JIAYING (CN)
HUANG JIAYING (CN)
Application Number:
PCT/CN2022/072252
Publication Date:
September 22, 2022
Filing Date:
January 17, 2022
Export Citation:
Assignee:
FUJIAN CHANGTING GOLDEN DRAGON RARE EARTH CO LTD (CN)
International Classes:
H01F1/057; H01F1/055; H01F41/02
Foreign References:
| CN112992460A | 2021-06-18 | |||
| CN111223627A | 2020-06-02 | |||
| CN111261355A | 2020-06-09 | |||
| CN107871581A | 2018-04-03 | |||
| US20130069746A1 | 2013-03-21 | |||
| CN108831650A | 2018-11-16 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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