钴掺杂对纳米镝铁氧体结构和磁特性的影响  

Effect of Doped Cobalt on Structural and Magnetic Properties of Dysprosium Ferrite Nanoparticles

作　　者：张茂润[1] 张然[2] 陈静[3] 

机构地区：[1]安徽理工大学化工学院,安徽淮南232001 [2]南京工业大学电气工程与控制科学学院,江苏南京211800 [3]中钢集团安徽天源科技股份有限公司,安徽马鞍山243000

出　　处：《中国稀土学报》2017年第2期209-214,共6页Journal of the Chinese Society of Rare Earths

基　　金：安徽省教育厅自然科学基金项目(2006Kj143B);国家大学生创新训练计划项目(201310361067)资助

摘　　要：以NH_3·H_2O为沉淀剂,采用液相沉淀法制备出平均粒径约6~11 nm的钴镝铁氧体磁粒子。研究了低浓度Co^(2+)的掺杂对镝铁氧体结构和磁特性的影响,用XRF,XRD,TEM,VSM对样品的构建成分、微观结构、磁性能等进行了表征。结果表明:产物的构建成分主要为Fe_2O_3,Dy_2O_3,Co_3O_4,且其质量分数随Co^(2+)的掺入量不同而改变;Co^(2+)的掺杂不会改变镝铁氧体的微观结构,但磁特性会发生显著变化;随着Co^(2+)掺入量的增大,样品的粒径减小、饱和磁化强度(MS)降低、矫顽力(HC)和剩余磁化强度(M_r)显著提高。Co-Dy-ferrites nano-particles were synthesized by liquid precipitation method using NH3·H2O as precipitator,and the size of particles were ranged from 6 to 11 nm. The effect of doping of low concentration of Co2＋on magnetic properties and structure of Dy-ferrites nano-particles were investigated. The phase composition,microstructure,magnetic properties of the samples were characterized by XRF,XRD,TEM and VSM. The results showed that the phase composition of particles was mainly Fe2O3,Dy2O3,Co3O4,and the mass fraction of component varied with the amount of Co2＋doping. Low concentration of Co2＋did not change the original microstructure of particles,but the magnetic properties of particles change significantly： the size of the particle and its saturation magnetic intensity（MS） decreased with the increase of Co2＋content,while its coercivity（HC） and residual magnetization（Mr） increased significantly.

关 键 词：纳米磁粒子 钴镝铁氧体 Co2+掺杂 磁特性 

分 类 号：TQ92[轻工技术与工程—发酵工程] TQ050.4