锰锌铁氧体纳米颗粒及其磁性液体的制备与磁性研究  

Preparation and Magnetic Properties of Mn-Zn Ferrite Nanoparticles and Magnetic Fluid

作　　者：李定国[1,2] 熊杰[2] 卢文华[2] 熊永红[1] 

机构地区：[1]华中科技大学物理学院,武汉430074 [2]海军工程大学理学院,武汉430033

出　　处：《人工晶体学报》2012年第2期359-364,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(20971048)

摘　　要：采用化学共沉淀法制备出Mn1-xZnxFe2O4(x=0.1,0.2,0.3)磁性颗粒,通过X射线衍射(XRD)测试分析了Mn1-xZnxFe2O4(x=0.1,0.2,0.3)颗粒的结构参数及平均粒径,结果表明制备的样品为锰锌铁氧体纳米粒子。用振动样品磁强计(VSM)测量了样品的饱和磁化强度,对应x=0.1,0.2,0.3分别为25.3、44.4、30.7 emu/g。选用Mn0.8Zn0.2Fe2O4纳米粒子,通过油酸作分散剂,分散到航空煤油中制备出磁性液体样品,研究分析了磁性液体的磁化特性和热磁特性。Mn1-xZnxFe2O4（x=0.1,0.2,0.3） ferrite magnetic particles were prepared by chemical coprecipitation method.The structure and the average particle sizes were determined by X-ray diffraction（XRD） analysis,and it shows that the prepared particles are Mn-Zn ferrite nanoparticles.The saturation magnetization of samples was 25.3 emu/g,44.4 emu/g and 30.7 emu/g for x=0.1,0.2 and 0.3,respectively,and which were measured by vibrating sample magnetometer（VSM）.Mn0.8Zn0.2Fe2O4 nanoparticles were used for ferrofluid preparation,which were suitably dispersed in aviation kerosene using oleic acid as the surfactant.Saturation magnetization and thermomagnetic properties of the ferrofluids were measured and discussed.

关 键 词：锰锌铁氧体 化学共沉淀法 磁性液体 磁化强度 热磁效应 

分 类 号：TM27[一般工业技术—材料科学与工程]