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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12531174 B1

PDFFull Text
Date of Patent:
Jan. 20, 2026

Filed:

Jul. 07, 2020

R-t-b-based permanent magnet material, preparation method therefor and use thereof

Applicant:

Fujian Golden Dragon Rare-earth Co., Ltd., Fujian, CN;

Inventors:

Qin Lan, Fujian, CN;

Jiaying Huang, Fujian, CN;

Dakun Chen, Fujian, CN;

Assignee:

FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd., Fujian, CN;

Attorneys:

Houston Beshining Law Office PLLC

Liangang Ye

Primary Examiner:

Xiaowei Su

Int. Cl.
CPC ...
H01F 1/057 (2006.01); B22F 3/24 (2006.01); B22F 9/04 (2006.01); C22C 38/00 (2006.01); C22C 38/10 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); H01F 1/055 (2006.01); H01F 1/058 (2006.01); H01F 7/02 (2006.01);
U.S. Cl.
CPC ...
H01F 1/0557 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/10 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); H01F 1/058 (2013.01); C22C 2202/02 (2013.01);
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: 29.0-32.5% 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, 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.

Find Patent Forward Citations

Lan, Qin. (2026). R-t-b-based permanent magnet material, preparation method therefor and use thereof (U.S. Patent No. 12531174). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12531174

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