【摘要】 采用薄形结晶器铸锭技术 ,气流磨窄粒度控制技术 ,低氧含量控制技术 ,高取向磁场成型技术等成功地批量生产了磁能积为 36 5kJ/m3 和磁能积为 310kJ/m3,矫顽力为 16 40kA/m的NdFeB磁体。研究表明 :获得尺寸细小的片状晶铸锭、平均粒度小于 4 0 μm的窄粒度分布的粉末 ,高取向度且晶粒细小组织均匀的烧结体是生产高性能NdFeB的关键。更多还原

【Abstract】 Adopting the new techniques, such as thin NdFeB ingot technique, narrow particle distribution on jet mill, low oxygen content control and high magnetic field press, a high energy product ( BH ) max of 365kJ/m 3 and ( BH ) max of 310kJ/m 3 with an intrinsic coercivity i H c of 1640kA/m of NdFeB sintered magnets is produced. To obtain high performance of NdFeB sintered magnets, the small flake crystalline grain of NdFeB ingot, narrow particle distribution and the average size of NdFeB powders less than 4.0μm, uniform small and high oriented Nd 2Fe 14 B grains are critical.更多还原