硅油基镝铁氧体磁流体研制及表征  

Preparation and Properties of Silicon-oil-based Dysprosium Ferrite Magnetic Fluids

作　　者：吴凤义[1] 张茂润[2] 万新军[1] 张忠平[1] 王新运[1] 

机构地区：[1]巢湖学院化学与材料科学系,安徽巢湖238000 [2]安徽理工大学化工学院,安徽淮南232001

出　　处：《金属功能材料》2009年第5期27-30,7,共5页Metallic Functional Materials

基　　金：巢湖学院科学研究基金项目(项目编号:XLY-200804)

摘　　要：用化学共沉淀法制备了硅油基镝铁氧体磁流体。用TEM观测了磁粒子形貌及粒径大小;用VSM测定磁流体饱和磁化强度并绘制磁滞回线,证实了磁流体具有良好的超顺磁性;用XRD分析了镝铁氧体磁粒子为反尖晶石结构。实验表明:制备工艺条件一定,以平均粒径为13.6 nm的镝铁氧体磁粒子做基体材料,制备的硅油基磁流体具有较强的稳定性和饱和磁化强度,实验测得透光率、饱和磁化强度分别达3.4%、1328.4 Gs。Silicon oil based dysprosium ferrite magnetic fluids was prepared by the chemical co precipitation method. The shape and size of dysprosium ferrite magnetic particles was determined by the TEM. The VSM was used to measure the saturation magnetization and to plot the magnetic hysteresis loops for dysprosium ferrite magnetic fluids with good superparamagnetism. The crystal structure and chemical composition of dysprosium ferrite magnetic particles was tested by the XRD. The results show that the dysprosium ferrite magnetic particles of average size of 13.6 nm are suited to prepare silicon-oil-based dysprosium ferrite magnetic fluids. Its transmissivity is 3.4% and the sat uration magnetization is 1328.4 Gs.

关 键 词：化学共沉淀 镝铁氧体磁流体 超顺磁性 

分 类 号：O614.811[理学—无机化学]