Title:
R-T-B-BASED PERMANENT MAGNET MATERIAL, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/218702
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 comprises R, B, M, Fe, Co, X and inevitable impurities, wherein: (1) R is a rare earth element, and the R includes at least Nd and RH, M being one or more of Ti, Zr and Nb, and X including Cu, "Al and/or Ga"; and (2) in percentage by weight, R: 30.5-32.0 wt%, B: 0.95-0.99 wt%, M: 0.3-0.6 wt%, X: 0.8-1.8 wt%, and Cu: 0.35-0.50 wt%, and the balance is Fe, Co and inevitable impurities. According to the present invention, under the condition of 0.3-0.6 wt% of a high melting point metal, a permanent magnet material with an excellent magnet performance and a good squareness is obtained.
Inventors:
LAN QIN (CN)
HUANG JIAYING (CN)
HUANG JIAYING (CN)
Application Number:
PCT/CN2021/088321
Publication Date:
November 04, 2021
Filing Date:
April 20, 2021
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; H01F38/12; H01F38/14; H01F38/16; H01F41/02
Foreign References:
| CN111524675A | 2020-08-11 | |||
| CN110993234A | 2020-04-10 | |||
| CN110853855A | 2020-02-28 | |||
| JP2014027268A | 2014-02-06 | |||
| JP2017045828A | 2017-03-02 | |||
| CN110648813A | 2020-01-03 | |||
| JP2002075717A | 2002-03-15 | |||
| CN200480001869A | 2004-08-10 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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