Co_(0.2)Fe_(2.8)O_4多孔微球的制备及磁性研究  

Sdudy of magnetic properties and synthesis of Co_(0.2)Fe_(2.8)O_4 porous microspheres

作　　者：吕庆荣[1] 方庆清[1] 刘艳美[1] 

机构地区：[1]安徽大学物理与材料科学学院安徽省信息材料与器件重点实验室,安徽合肥230039

出　　处：《安徽大学学报（自然科学版）》2013年第4期46-50,共5页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省自然科学基金资助项目(090414177);安徽大学博士科研启动经费资助项目

摘　　要：用溶剂热法结合奥斯特瓦尔德熟化过程制备Co0.2Fe2.8O4多孔微球.用X射线衍射仪(XRD)和扫描电子显微镜(SEM)表征样品的结构和形貌,发现所制备的单分散Co0.2Fe2.8O4多孔微球是由许多纳米颗粒组装而成.用振动样品磁强计(VSM)测量样品在不同温度下的磁性,发现其饱和磁化强度随温度升高先保持稳定后快速降低,而矫顽力随温度升高持续减小.Co0.2Fe2.8O4 porous nanostructure microspheres were prepared by solvothermal reaction with the combination of the Ostwald ripening process. X-ray diffraction （XRD） and scanning electron microscopy （SEM） were used to characterize the structure and morphology of samples. The results showed the prepared monodisperse Co0.2Fe2.8O4 porous microspheres with about 300 nm diameter were assembled by many nanoparticles. The magnetic properties were evaluated with a vibrating sample magnetometer （VSM）. The saturation magnetization remained stable first and then decreased rapidly, and the coercivity continued to reduce with the increase of temperature.

关 键 词：Co0 2Fe2 8O4 多孔微球 制备 磁性 

分 类 号：TQ138.1[化学工程—无机化工]