纳米CoFe_2O_4的制备中前驱体热分解过程研究  

Study on Thermo-Decomposition Process of the Precursor in the Preparation of Nano CoFe_2O_4

作　　者：肖利[1] 王春雄[1] 刘建华[1] 黄威[1] 

机构地区：[1]湖南工业大学冶金工程学院,湖南株洲412008

出　　处：《湖南工业大学学报》2010年第4期1-4,共4页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(50874119);湖南工业大学大学生研究性学习和创新性实验计划基金资助项目(湖工大教字[2009]20-49)

摘　　要：采用溶胶-凝胶法,制备出具有尖晶石结构的纳米钴铁氧体。采用TG/DTG方法研究前躯体热分解反应过程,结果表明钴铁氧体的各个热分解阶段的活化能各不相同。采用XRD和IR分析不同灼烧温度对前躯体物相组成的影响。产品经激光粒度仪和TEM分析,表明产物为平均粒径100 nm以内的纳米微粒;产物经振动样品磁强计测定,表明该产品矫顽力及比饱和磁化强度分别为78 kA.m-1和72 A.m2.kg-1。Nano cobalt ferrite oxide powders were prepared by sol-gel method. TG/DTG were applied to investigate thermo-decomposition process of the precursor and the results showed that nano cobalt ferrite oxide had different activation energy in every thermo-decomposifion stage. XRD and IR were used to analyze the effect of different calcination temperature on phase composition of the precursor. By the analysis of laser granulometer and TEM, the products showed to be nanoparticles of average size within 100 nm. Determined by vibration sample magnetometer, the products＇ coercive force and saturation magnetization were 78 kA·m^-1 and 72 A· m^2· kg^-1 respectively.

关 键 词：纳米粉末 热分解过程 钴铁氧体 

分 类 号：O614.81[理学—无机化学]