一种烧结钕铁硼永磁体及其制备方法和应用
By controlling the ratio and distribution of nitrogen-rich and nitrogen-poor phases in NdFeB permanent magnets, and combining low-temperature grinding and specific airflow milling processes, the problem of nitrogen content control was solved, the magnetic and mechanical properties of the magnets were improved, and production costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YANTAI ZHENGHAI MAGNETIC MATERIAL CO LTD
- Filing Date
- 2024-12-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies struggle to effectively control the nitrogen content in neodymium iron boron magnets, leading to performance degradation. In particular, in large-scale production, inert gases are costly and introduce carbon impurities, affecting product performance.
By controlling the composition of the main phase grains and grain boundary phases, especially the ratio and distribution of nitrogen-rich and nitrogen-poor phases, and combining low-temperature grinding and specific airflow milling processes, the distribution of nitrogen in the grain boundary phase can be regulated to optimize magnetic and mechanical properties.
A reasonable distribution of nitrogen in neodymium iron boron permanent magnets has been achieved, which improves the magnetic and mechanical properties of the magnets, reduces production costs, and avoids the use of inert gases.
Smart Images
Figure CN119763965B_ABST