Title:
R-T-B PERMANENT MAGNET MATERIAL AND PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/098226
Kind Code:
A1
Abstract:
An R-T-B permanent magnet material and a preparation method therefor and a use thereof. The R-T-B permanent magnet material comprises the following components: R', which is between 29.5 wt. % and 33.0 wt. %, the R' comprising R, Pr, and Nd, R being a rare earth element other than Pr and Nd, the Pr content being greater than or equal to 8.85 wt. %, the mass ratio of Nd to R' being less than 0.5; N, which is greater than 0.05 wt. %, and less than or equal to 4.1 wt. %, the N being Ti, Zr, or Nb; B, which is between 0.90 wt. % and 1.2 wt. %; and Fe, which is between 62.0 wt. % and 68.0 wt. %. A sintered permanent magnet product having a high coercive force and a stable temperature coefficient is prepared by using a formulation having a high Pr content. The described formulation can maximally exert the advantage of Pr, and effectively reduce production costs.
Inventors:
FU GANG (CN)
HUANG JIAYING (CN)
HUANG JIXIANG (CN)
QUAN QICHEN (CN)
HUANG JIAYING (CN)
HUANG JIXIANG (CN)
QUAN QICHEN (CN)
Application Number:
PCT/CN2020/100590
Publication Date:
May 27, 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:
H01F41/02; H01F1/057
Foreign References:
| CN110853855A | 2020-02-28 | |||
| CN104979062A | 2015-10-14 | |||
| CN104979062A | 2015-10-14 | |||
| CN102903471A | 2013-01-30 | |||
| CN103871705A | 2014-06-18 | |||
| CN103366918A | 2013-10-23 | |||
| JPH06124825A | 1994-05-06 |
Other References:
See also references of EP 4016558A4
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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