铁酸钴纳米晶的低温合成、谱学表征及磁性  

Low-temperature Synthesis,Spectral Characterization and Magnetic Properties of CoFe_2O_4 Nanocrystals

作　　者：艾伦弘[1] 蒋静[1] 

机构地区：[1]西华师范大学化学化工学院 化学应用与污染控制技术重点实验室,南充637002

出　　处：《应用化学》2010年第1期78-81,共4页Chinese Journal of Applied Chemistry

基　　金：西华师范大学科研启动基金(07B005)资助项目

摘　　要：以十六烷基三甲基溴化铵(CTAB)为模板,Fe(NO3)3.9H2O和Co(NO3)2.6H2O为原料,NaOH为沉淀剂,低温回流合成了磁性铁酸钴纳米晶。利用X射线衍射、透射电子显微镜、红外光谱、拉曼光谱等测试技术对产品的结构进行了表征,借助振动样品磁强计测定了样品的室温磁性能。结果表明,铁酸钴纳米晶为单相立方尖晶石结构,纳米晶的平均粒径为15～20 nm。铁酸钴纳米晶在室温外加磁场下表现出明显的磁滞现象,饱和比磁化强度MS=36.5 A.m2/kg,矫顽力HC=5.89×104A/m。CoFe2O4 nanocrystals were prepared by means of a low temperature refluxing method with CTAB as templet,Fe（NO3）3·9H2O and Co（NO3）2·6H2O as precursors,NaOH as precipitator.The as-prepared products were characterized by X-ray diffraction,transmission electron microscopy,infrared and Raman spectroscopies.The room temperature magnetic properties were determined by means of vibrating sample magnetometer.The results show that CoFe2O4 has a single-phase spinel structure.The average particle size was in a range of 15~20 nm.CoFe2O4 exhibited a clearly magnetic hysteretic behavior under applied magnetic field at room temperature.The values of variation of saturation magnetization（Ms） and coercivity（HC） were 36.5 A·m2/kg and 5.89×104 A/m,respectively.

关 键 词：铁酸钴 低温合成 红外光谱 拉曼光谱 磁性 

分 类 号：O641.2[理学—物理化学]