超声波辅助球磨纳米Mn_xMg_(1-x)Fe_2O_4的制备和表征  

Preparation and Characterization of Mn_xMg_(1-x)Fe_2O_4 Nanoparticles by Ultrasonic-assisted Ball Milling

作　　者：陈鼎 肖界魁 詹军[3] CHEN Ding;XIAO Jiekui;ZHAN Jun(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China;College of Material Science and Engineering,Hunan University,Changsha 410082,China;Engineering Training Center,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082 [2]湖南大学材料科学与工程学院,湖南长沙410082 [3]湖南大学工程训练中心,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2018年第6期51-55,共5页Journal of Hunan University:Natural Sciences

基　　金：湖南省自然科学基金资助项目(14JJ1013)~~

摘　　要：采用超声辅助球磨法制备了具有尖晶石相的纳米锰镁铁氧体Mn_xMg_(1-x)Fe_2O_4(x=0.2,0.5,0.8),并利用X射线衍射仪(XRD)、透射电子显微镜(TEM)、振动样品磁强计(VSM)、荧光强度测试仪、电导率仪对反应产物进行了一系列的表征.X射线衍射图谱表明当反应进行到60h,单相立方尖晶石结构已经完全形成.透射电子显微镜表明样品(x=0.2)粉末的平均尺寸在25nm左右.饱和磁化强度在x=0.5时达到最大的74.22emu/g,并且随着x值的增大,饱和磁化强度降低.在不同实验条件下,荧光强度和电导率有着明显的不同,其变化说明超声辅助球磨对反应有显著的耦合作用.In this paper, a series of Mn-Mg ferrites with the formula MnxMg1-xFe2O4 （ x =0.2,0.5,0.8） have been successfully prepared by ultrasonic-assisted ball milling approach. The characterization of the samples has been done using room temperature X-ray diffraction （XRD）,transmission electron microscopy （TEM）, vibrating sample magnetometer （VSM）. The XRD results reveal that the formation of single-phrase ferrite is fully completed after 60 h. The TEM micrograph confirms that the average size of nanoparticles is about 25 nm. The maximum saturation magnetization of 74.22 emu/g is obtained when x =0.5, which decreases with the further Mn doping. The fluorescence measurements and electroconductivity detections reflect the reaction speed and confirm the coupling effect of ultrasonic and ball milling.

关 键 词：超声波 球磨 纳米铁氧体 磁性能 

分 类 号：TB383[一般工业技术—材料科学与工程]