摘要： 通过改变研磨设备运动状态和研磨介质质量，研究研磨介质动能对永磁铁氧体指标的影响。 结果表明：较小的研磨介质动能有利于改善铁氧体料粉的粒度分布，有利于降低晶粒的畸变程度，由此获得较高的磁性能、较小的垂直于易磁化轴的收缩率和磁体密度，同时改善产品外观的完整率、 尺寸准确率和烧结温区宽度； 生产过程中钢球直径应在4.0~6.5 mm 范围内进行级配，球磨机转速应在（20~26）/√D r/min（D 为球磨机直径，m）范围内选取。

关键词：永磁铁氧体；球磨；磁性能；粒度分布；晶格畸变

Abstract： By changing the speed of grinding equipment and mass of grinding media， the effect of kinetic energy of grinding media on permanent ferrite indicators was studied. The results show that the lower kinetic energy of grinding media can help to improve the particle size distribution of ferrite powders， and reduce the distortion of crystal grains. Higher magnetic properties and smaller shrinkage perpendicular to easy axis as well as magnetic density are thereby obtained. The full rate of the product appearance， size accuracy and sintering temperature zone width are improved. The ball diameter in production process should be graded in the range of 4.0~6.5 mm. The ball speed should be selected in the range of （20~26）/√D r/min， where D isthe diameter of ball mill. 

Keywords: permanent ferrite； ball mill； magnetic property； particle size distribution； lattice distortion