纳米PrNd对烧结MMFeB磁体的性能和结构的影响  

The effect of the doped PrNd nano-particles on microstructures and magnetic properties of the sintered MMFeB permanent magnet

作　　者：张雪峰[1,2] 张文凯[1,2] 李永峰[1,2] 刘艳丽[1,2] 马强[1,2] 徐丽琴[3] 

机构地区：[1]内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室,包头014010 [2]内蒙古科技大学数理与生物工程学院,包头014010 [3]广州大学物理与电子工程学院,广州510006

出　　处：《内蒙古科技大学学报》2015年第1期37-40,共4页Journal of Inner Mongolia University of Science and Technology

基　　金：内蒙古自然科学基金资助项目(2009J1006;2012MS0802);包头市重大科技发展基金资助项目(2012R1006;201181008-3)

摘　　要：基于对稀土资源综合利用和减少稀土资源浪费的考虑,直接采用混合稀土金属(MM)制备MMFeB永磁材料,研究了添加纳米PrNd对MMFeB磁体的性能和结构的影响.结果表明,MM_(14.6)Fe_(79)B_(6.4)粉末添加5%的纳米PrNd后取向压坯,当烧结温度为1 050℃时,综合磁性能均最好,B_r为0.89 T、H_(cj)为196.0 kA/m以及(BH)_(max)72.05 kJ/m^3.此外,纳米PrNd的添加可以改善磁体的取向度,从而提高磁体的剩磁,同时纳米PrNd的添加还可以起到阻碍晶粒长大,细化晶粒的作用,提高了磁体的矫顽力,从而提高最大磁能积.这也为稀土资源综合利用提供了可能.To utilize the earth resources comprehensively and reduce the waste of rare earth resources, the misch-metal （MM） was directly used to prepare MMFeB permanent magnetic material, and the effects of the doped PrNd nano-particles on microstructures and magnetic properties of MMFeB permanent magnet were studied. The results showed that,when the sintered temperature is 1050℃, the orientated compacts that MM14.6Fe79 B6.4 powder doped by 5% PrNd nano-particles exhibit the preferably integrated magnetic properties ： Br = 0.89 T, Hej = 196.0 kA/m and （BH） max = 72. 05 kJ/m^3. In addition, the doped PrNd nano-particles can improve the orientation degree of the magnet, thereby enhancing the remanence of the magnet. At the same time, the doped PrNd nano-particles can not only hinder the grain growth but also refine the grain, thus improving the coercivity of the magnet and finally increasing the maximum energy product （BH） max of the magnets. It also possibly provides for the comprehensive utilization of rare earth resources.

关 键 词：混合稀土 MMFeB 纳米PrNd 磁性能 微结构 

分 类 号：TG146.1[一般工业技术—材料科学与工程]