导电TiO2粉体的制备及性能研究  

Studies on the preparation and property of conductive titanium dioxide powder

作　　者：钱建华[1] 孙科[1] 刘琳[1] 邢锦娟[1] 

机构地区：[1]渤海大学化学化工学院,功能化合物合成与应用辽宁省重点实验室,辽宁锦州121013

出　　处：《化学研究与应用》2016年第3期350-354,共5页Chemical Research and Application

基　　金：辽宁省特聘教授支持计划资助;辽宁省科技厅重点实验室项目(2008403001)资助

摘　　要：本文采用化学共沉淀法,以SnCl_4·5H_2O、SbCl_3等为原料包覆微纳米TiO_2,制备了电导率良好的导电粉体。采用红外光谱(FT-IR)、X射线粉末衍射仪(XRD)、扫描电镜(SEM)等对表面包覆前后的微纳米TiO_2结构进行了表征。结果表明,锑原子置换了氧化锡中的锡原子形成缺陷固溶体,主要以物理吸附的方式吸附在TiO_2表面,也可能存在化学吸附,形成Ti-O-Sn键。通过测量粉体的电阻率表征粉体的导电性能,对比试验结果可得:当pH为1.5,煅烧温度为500℃,SnCl_4·5H_2O/TiO_2(m/m)为25%,SbCl_3/SnCl_4·5H_2O(m/m)为14%时,包覆后的导电粉体电阻率最小,为12Ω·cm,进而验证该条件下制得的导电粉体具有良好的导电性能。Micro-nano titanium dioxide conductive powder was prepared by the chemical co-precipitation method,with SnCl4·5H2O and SbCl3 as raw materials,which was of excellent electrical conductivity.The product was characterized by fourier transmission infrared spectroscopy（ FT-IR）,X-ray diffraction（ XRD） and scanning electron microscopy（ SEM）. The result indicated Sb substituted Sn in SnO2 lattice to form defects of solid solution,physically adsorbed on the surface of TiO2,or chemically acted to form Ti-O-Sn bond.By measuring the resistivity of the conductive powder to characterize electrical conductivity,under the conditions of calcination temperature for 500℃ when the mass ratio of SnCl4·5H2O and TiO2 was 25%,that of SbCl3 and SnCl4·5H2O for 14%,and p H was of 1. 5,the test result showed that the resistivity of the conductive powder was the smallest that was 12 Ω·cm.The conductive powder was of good conductive property further to verify above conditions.

关 键 词：TIO2 表面包覆 电阻率 导电性能 

分 类 号：O69[理学—化学]