摘要：采用不同工艺对永磁铁氧体预烧料进行粉磨处理,以平均粒度测试仪结合沉降法比较颗粒料粒度及其分布,利用永磁铁氧体标准测量装置及压力试验机对产品相关磁性能进行检测。结果表明:与传统粉磨工艺相比,在2个阶段中不同速度、钢球直径、料-球-水质量比的粉磨工艺的球磨效率提高22%,成型周期缩短8%以上,磁体的综合合格率提高7.6%以上,产品承受负荷极限压强增大8.3%;磁体的剩余磁感应强度、内禀矫顽力分别增大1.17%、4.4%;成型用料浆的空隙率、生坯密度、磁体的显微结构等也均得到明显的改善。

关键词：永磁铁氧体；磁性能；粉磨工艺

Abstract：The pre-sintered materials of permanent magnetic ferrite were ground by different processes. The particle size distribution of the granular materials was compared by an average particle size tester in combination with the method of sedimentation. The related magnetic property of the products was tested by a standard measuring device for permanent magnetic ferrite and a product pressure testing machine. The results show that compared with the traditional fine grinding process,there are the following conclusions for fine grinding technology with different speeds,steel ball diameters,mass ratios of materials,ball and water in two stages.The ball milling efficiency is improved by 22%,the molding cycle is shortened more than 8 %. The overall pass rate of the magnet is improved by more than 7.6%. The bearing load limit of the products is increased by8.3%. The residual magnetic flux density and coercive force of the magnet are increased by 1.17% and 4.4%,respectively. The porosity of the molding slurry,green density,microstructure of the magnet and so on are also significantly improved.

Keywords: permanent magnetic ferrite；magnetic property；fine grinding