Title:
R-T-B-BASED PERMANENT MAGNETIC MATERIAL, RAW MATERIAL COMPOSITION, PREPARATION METHOD THEREFOR AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/244317
Kind Code:
A1
Abstract:
Disclosed are an R-T-B-based permanent magnetic material, a raw material composition, a preparation method therefor and a use thereof. The raw material composition of the R-T-B-based permanent magnetic material contains the following components in percentages by mass: R: 29.5-32%, R being a rare earth element containing at least Nd, and the content of Pr being 0-17%; Zr: 0.15- 0.50%; Cu: 0-0.08%, but not 0 and not 0.08; Co: 0-0.3%; M: 0-3%, M being one or more of Al, Ga, Ti, Nb, Hf, Si, Sn, Ge, Ag, Au, Bi and Mn; B: 0.95-1.05%; and Fe: 64-70%. The percentage is the mass percentage of the total mass of the raw material composition of the R-T-B-based permanent magnetic material, and the sum of the content of each component is 100%. The R-T-B-based permanent magnetic material of the present invention has the advantages of having a good squareness, a good high-temperature property and excellent mechanical properties.
Inventors:
LAN QIN (CN)
HUANG JIAYING (CN)
ZHANG YANYAN (CN)
HUANG JIAYING (CN)
ZHANG YANYAN (CN)
Application Number:
PCT/CN2021/095088
Publication Date:
December 09, 2021
Filing Date:
May 21, 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; C22C33/02; C22C38/00; H01F1/08; H01F41/02
Foreign References:
| CN1557004A | 2004-12-22 | |||
| CN101256860A | 2008-09-03 | |||
| CN104395971A | 2015-03-04 | |||
| CN102436889A | 2012-05-02 | |||
| CN101542644A | 2009-09-23 | |||
| CN111613407A | 2020-09-01 | |||
| JP2006237168A | 2006-09-07 |
Attorney, Agent or Firm:
SHANGHAI JOINT-WIN LAW FIRM (CN)
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