改进Pechini法制备镍铁氧体纳米颗粒及其表征  

Nickel Ferrite Nano-Particles Prepared by Improved Pechini Method and Its Characterization

作　　者：刘献明[1] 张瑞[1] 尹卫东[1] 

机构地区：[1]洛阳师范学院化学化工学院,洛阳471022

出　　处：《机械工程材料》2012年第2期58-60,75,共4页Materials For Mechanical Engineering

基　　金：河南省科技攻关项目(092102310113);河南省自然科学基金资助项目(2008B430019)

摘　　要：用改进的Pechini法制备了高度分散的泡沫凝胶颗粒,然后分别在500,650,800℃进行热分解得到了镍铁氧体纳米颗粒;用XRD、TEM、IR及VSM等对其形貌、结构和磁性能进行了分析。结果表明:用改进Pechini法得到的镍铁氧体纳米颗粒分散性好,尺寸均匀,晶化程度高,纯度高;500℃热解后得到的镍铁氧体粒径为50～120nm;室温下在796kA.m-1磁场下的饱和磁化强度可达13.03kA.m-1;随着热解温度的升高,镍铁氧体纳米颗粒的直径、饱和磁化强度、矫顽力都增大。Nickel ferrite nano-particles were obtained by decomposing high-dispersed foamed gel prepared by improved Pechini method at 500,650 and 800 ℃,respectively.The morphology,structure,and magnetic characteristics of the nano-particles were analyzed by X-ray diffraction,transmission electron microscopy,infrared and vibrating sample magnetometer.The results show that nickel ferrite nano-particles obtained by improved Pechini method exhibited dispersibility,uniform distribution,high crystallinity and purity.The diameter of nickel ferrite nano-particles decomposed at 500 ℃ was 50-120 nm;its saturation magnetization was 13.03 kA·m-1 at the maximum magnetic field of 796 kA·m-1 at room temperature.With the increase of thermol decomposition temperature,the paprticle size,saturation magnetization and coercivity of nickel ferrite nano-particles increased.

关 键 词：铁氧体纳米颗粒 磁性能 Pechini方法 矫顽力 

分 类 号：TH117.3[机械工程—机械设计及理论]