Title:
R-T-B-BASED PERMANENT MAGNET MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/109568
Kind Code:
A1
Abstract:
Disclosed are an R-T-B-based permanent magnet material, a preparation method therefor and the use thereof. The R-T-B-based permanent magnet material I comprises the following components: 29.0 to 32.5 wt.% of R including RH, 0.30 to 0.50 wt.% of Cu, 0.05 to 0.20 wt.% of Ti, 0.85 to 1.05 wt.% of B, 0.1 to 0.3 wt.% of C, and 66 to 68 wt.% of Fe, wherein R is a rare earth element and R at least includes Nd; and RH is a heavy rare earth element and RH at least includes Tb or Dy. A Cu-Ti-C grain boundary phase is formed in the R-T-B-based permanent magnet material I, and Hcj is significantly improved.
Inventors:
LAN QIN (CN)
HUANG JIAYING (CN)
CHEN DAKUN (CN)
HUANG JIAYING (CN)
CHEN DAKUN (CN)
Application Number:
PCT/CN2020/100585
Publication Date:
June 10, 2021
Filing Date:
July 07, 2020
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; H01F41/02
Foreign References:
| CN110993232A | 2020-04-10 | |||
| JP2000331810A | 2000-11-30 | |||
| CN102296228A | 2011-12-28 | |||
| CN102938282A | 2013-02-20 | |||
| CN102304663A | 2012-01-04 | |||
| JP2018082040A | 2018-05-24 |
Other References:
See also references of EP 3940723A4
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
Download PDF: