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R-T-B based permanent magnet materials, raw material composition, manufacturing methods, applicat

2025-07-27 18:432210下载
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An R-T-B series permanent magnet material, a raw material composition, a preparation method and an application. An R-T-B series permanent magnet material I comprises R, T and X, which satisfy the following relational formula : (1) the atomic ratio of (Fe+Co)/B is 12.5-13.5; (2) the atomic ratio of B/X is 2.7-4.1; and X is one or more among Al, Ga and Cu. The permanent magnet material comprises R2T14B primary phase crystalline particles, and a secondary grain boundary phase and a rare earth rich phase between two adjacent R2T14B primary phase crystalline particles. The secondary grain boundary phase and rare earth rich phase comprise phases composed of R6T13X. R6T13X phases are formed in the R-T-B series permanent magnet material I, so that Hcj and mechanical performance can be synchronously improved.


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