Granted Patent B2

US 12,531,174 · App. 17/600,106 · Granted Jan 20, 2026

Inventors: Qin Lan (Fujian, CN); Jiaying Huang (Fujian, CN); Dakun Chen (Fujian, CN)

Assignee: FUJIAN GOLDEN DRAGON RARE-EARTH Co., Ltd.

H01F1/0557C22C38/002C22C38/005C22C38/10C22C38/14C22C38/16H01F1/058C22C2202/02

Abstract

Claims (19)

1 . An R-T-B-based permanent magnet material I, wherein, the R-T-B-based permanent magnet material I consists of the following components by mass percentage:

29.0-32.5 wt. % of R;

0.30-0.50 wt. % of Cu;

0.05-0.20 wt. % of Ti;

0.85-1.05 wt. % of B;

0.1-0.3 wt. % of C;

0.2-0.5 wt. % of Ga;

0-0.15 wt. % of O, but not 0;

0.5-1.5 wt. % of Co;

66-68 wt. % of Fe, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I;

R is a rare earth element, and the R consists of RH, Pr and Nd;

RH is a heavy rare earth element, and RH is Tb, Dy or a combination of Tb and Dy; the content of RH is 0.5-1.2 wt. %;

the R-T-B-based permanent magnet material I has Cu—Ti—C grain boundary phase at the grain boundary of the magnet, which is formed in grain boundary diffusion process.

2 . The R-T-B-based permanent magnet material I according to claim 1 , wherein, the content of R is 30-32.5 wt. %, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I;

or, the content of Cu is 0.3-0.45 wt. % or 0.5 wt. %, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I;

or, the Ti content is 0.1-0.2 wt. %, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I;

or, the content of B is 0.9-1.0 wt. %, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I;

or, the content of C is 0.1-0.2 wt. %, wt. % refers to the mass percentage in the R-T-B-based permanent magnet material I.

3 . An electronic component, comprising the R-T-B-based permanent magnet material I according to claim 1 .

Assignments (3)

Priority Claims (1)

Continuity (1)

References Cited (13)