一种无重稀土高剩磁高矫顽力磁体及其制备方法
By adjusting the raw material composition and three-stage aging process of NdFeB magnets, and optimizing the microstructure, the problem of insufficient coercivity of NdFeB sintered magnets in high-temperature environments was solved, achieving the effects of high remanence and high coercivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO KONIT IND
- Filing Date
- 2024-12-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing NdFeB sintered magnets have insufficient coercivity in high-temperature environments, and the reserves of heavy rare earth elements Dy and Tb are scarce and expensive, resulting in unstable magnet performance and difficulty in maintaining high remanence and high coercivity without adding or with little addition of heavy rare earth elements.
By adjusting the raw material composition of NdFeB magnets, including the proportions of R, B, Co, Cu, Ga, M2 and M3, and combining it with a three-stage aging process, the microstructure is optimized, the proportion of the R6T13M1 phase is increased, and the uniform distribution of elements such as Cu and Co is promoted to form an efficient grain boundary structure.
Without adding or with minimal addition of heavy rare earth elements, the remanence and coercivity of the magnet were significantly improved, ensuring stable performance under high-temperature conditions.
Smart Images
Figure CN119763966B_ABST