混料方式对钕铁硼磁粉的流动性和磁体性能的影响  

Influence of Mixing Mode on Fluidity of NdFeB Magnetic Powder and Magnetic Properties

作　　者：张茂彩 崔红兵 王誉 那世航 程岩 艾静雯 蒙丽娟 辛博[1] Zhang Maocai;Cui Hongbing;Wang Yu;Na Shihang;Cheng Yan;Ai Jingwen;Meng Lijuan;Xin Bo(State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization,Baotou Rare Earth Research Institute,Baotou O014030,China;Inner Mongolia Rare Earth Functional Materials Innovation Center Co.LTD,Baotou O14030,China)

机构地区：[1]包头稀土研究院白云鄂博稀土资源研究与综合利用国家重点实验室,内蒙古包头014030 [2]内蒙古稀土功能材料创新中心有限责任公司,内蒙古包头014030

出　　处：《中国稀土学报》2024年第4期712-718,I0003,共8页Journal of the Chinese Society of Rare Earths

基　　金：国家重点研发技术项目“稀土新材料”重点专项2021年度项目(2021YFB3500802);内蒙古自治区2020年度关键技术攻关项目(2020GG0209);白云鄂博稀土资源研究与综合利用国家重点实验室自主课题(2022Z2445)资助。

摘　　要：通过对气流磨制得的钕铁硼磁粉进行粉体表面改性,利用传统三维混料机及高速剪切混料机进行粉体加工改性,研究了不同混料方式对钕铁硼磁粉的流动性、粒度分布、微观结构以及磁体性能的影响。经高速剪切混料设备改性的钕铁硼磁粉的松装密度达到1.8114 g·cm^(-3),振实密度达到3.7685 g·cm^(-3)。将改性磁粉经取向、等静压成型、烧结制备的钕铁硼磁体性能达到:B_(r)=14.23 kGs,H_(cj)=13.29 kOe,(BH)_(max)=49.42 MGOe。结果表明:改变混料方式能有效缩短混料时间,提升磁体性能,提高生产效率,节约时间成本。The effect of different mixing modes on the fluidity,particle size distribution,microstructure and magnetic properties of NdFeB magnetic powder was studied by surface modification of NdFeB magnetic powder made by airflow grinding,and powder processing by traditional 3D mixing machine and high-shear mixing machine.The bulk density and vibration density of NdFeB magnetic powder modified by high-shear mixing equipment reach 1.8114 and 3.7685 g·cm^(-3).The properties of NdFeB magnet prepared by orientation,isostatic pressing and sintering are as follows:B_(r)=14.23 kGs,H_(cj)=13.29 kOe,(BH)_(max)=49.42 MGOe.The results show that changing the mixing mode can effectively shorten the mixing time,improve the performance of the magnet,improve the production efficiency and save the time cost.

关 键 词：振实密度 钕铁硼磁粉 微观结构 表面改性 

分 类 号：TM272[一般工业技术—材料科学与工程]