Co^(2+)和Mg^(2+)取代对NiCuZn铁氧体纳米微粒微观结构和磁学性能的影响  

Effect of Mg^(2+) and Co^(2+) substitution on the microstructure and magnetic properties of NiCuZn ferrite nanoparticles

作　　者：郭维[1] 靳玉春[1] 侯华[1] 蒋博[1] 葛昆[1] 周丽亚[1] 赵宇宏[1] 

机构地区：[1]中北大学材料科学与工程学院,太原030051

出　　处：《功能材料》2014年第10期41-44,共4页Journal of Functional Materials

基　　金：科技部国际科技合作资助项目(2011DFA50520)

摘　　要：通过化学共沉淀法制备了NiCuZn铁氧体纳米微粒,采用X射线衍射仪、透射电镜以及振动样品磁强计分析研究Mg2+和Co2+共同取代Ni 2+对铁氧体微观结构和饱和磁化强度的影响。结果表明,适量的Mg2+和Co2+取代Ni 2+后,试样依然能够形成单一的尖晶石结构,没有第二相杂质出现;试样的晶格参数a和平均粒径Dx随Mg2+和Co2+取代量的增加而增大;透射电镜图片显示试样中有少量多面体形状的颗粒,并且出现团聚现象;饱和磁化强度Ms随Co2+取代量的增加单调增大,随Mg2+取代量的增加先增大后减小,并且在Mg2+的取代量为0.05、Co2+的取代量为0.08时,试样具有最大饱和磁化强度。In this paper,NiCuZn ferrite nanoparticles were prepared by chemical coprecipitation method.The effect of Mg2＋ and Co2＋ substitution on microstructure and magnetic properties were investigated.It was found that after appropriate content of Mg2＋ and Co2＋ replaced Ni2＋,all the samples could still form single spinel structure.Lattice parameter and average grain size was found to increase with increasing Mg2＋ and Co2＋ con-tent.TEM images showed a small amount of polyhedron particles in samples,and all the samples were aggre-gated.Saturation magnetization was found to increase with increasing Co2＋ content monotonously,and increase with Mg2＋ substitution for Ni2＋,up to x=0.05.When x=0.05,y=0.08,sample had the maximum satura-tion magnetization.

关 键 词：共沉淀法 NICUZN 离子取代 微观结构 饱和磁化强度 

分 类 号：TB321[一般工业技术—材料科学与工程]