Title:
R-T-B-BASED SINTERED MAGNET AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/135143
Kind Code:
A1
Abstract:
An R-T-B-based sintered magnet and a preparation method therefor. The R-T-B-based sintered magnet comprises: R, B, Ti, Ga, Al, Cu, and T. The contents thereof are as follows: the content of R is 29.0-33%; the content of B is 0.86-0.93%; the content of Ti is 0.05-0.25%; the content of Ga is 0.3-0.5%, but not 0.5%; the content of Al is 0.6-1%, but not 0.6%; the content of Cu is 0.36-0.55%. The percentage is the mass percentage. Under the condition that no heavy rare earth is added or a small amount of heavy rare earth is added, by using a low B technology, not only the remanence performance of the R-T-B-based sintered magnet is improved, but also the coercivity and the squareness of the magnet are ensured.
Inventors:
SHI YAO (CN)
LAN QIN (CN)
HUANG JIAYING (CN)
LAN QIN (CN)
HUANG JIAYING (CN)
Application Number:
PCT/CN2020/100575
Publication Date:
July 08, 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; B22F3/10; B22F9/02; C22C38/06; C22C38/10; H01F41/02
Domestic Patent References:
| WO2016133080A1 | 2016-08-25 |
Foreign References:
| CN111081444A | 2020-04-28 | |||
| CN110619984A | 2019-12-27 | |||
| CN105321647A | 2016-02-10 | |||
| CN103996475A | 2014-08-20 | |||
| CN102360654A | 2012-02-22 | |||
| CN201911423952A | 2019-12-31 | |||
| CN106128673A | 2016-11-16 |
Other References:
See also references of EP 4086924A4
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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