In_2O_3纳米纤维的制备及其导电性研究

Preparation and conductivity of In_2O_3 nanofibers

利用静电纺丝技术结合热处理方法制备了一维多孔结构的In2O3纳米纤维。借助扫描电子显微镜(SEM)和透射电子显微镜(TEM)观察纳米纤维的形貌结构;利用热重分析仪(TGA)分析前驱体复合纳米纤维的热处理过程;采用X射线衍射仪(XRD)分析不同煅烧温度下所得In2O3的晶体结构;利用四探针测试In2O3纳米纤维的导电性,并探讨煅烧温度对其导电性的影响。结果表明:静电纺前驱体复合纳米纤维成型良好,且经不同温度煅烧后产物仍保持纤维结构,但纤维直径明显减小。不同温度下煅烧所得In2O3均为立方铁锰矿型,随着煅烧温度的升高,In2O3纳米颗粒逐渐增大,晶体更加完整,导电性逐渐增强。

One-dimensional In2O3 nanofibers with porous were prepared by electrospinning and thermal treatment in air.The morphology and structure of the nanofibers were characterized by scanning electron microscopy（SEM）and transmission electron microscopy（TEM）.Thermogravimetry（TGA）was used to analyze the heat treatment process of precursor composite fibers.X-ray diffractometry（XRD）was used to distinguish the crystal structures of In2O3 nanoparticles under different calcination temperature.At last,the conductivity of In2O3 was tested by Four-probe to discuss the effect of calcination temperature on it.The experimental results showed that：the morphology and formation of precursor composite fibers were favorable,and products under different calcination temperature all remained fibrous structure,but the diameter of fibers were obviously reduced.In2O3 obtained under different calcination temperatures all had cubic bixbyite structure,as the calcination temperature raised,In2O3 nano-crystals slowly developed to complete with the particle size getting larger and larger,and its conductivity was also strengthened.