Preparation of nano-indium oxide by microemulsion and gas sensing properties

2020-02-23 02:29:38

method gas sintering oxide indium

责任者: Xu Jiaqiang;Li Huiping;Shen Jianian;Chen Yuping 单位: Inst. of Mater., Shanghai Univ., China 来源出处: Journal of the Chinese Ceramic Society(J. Chin. Ceram. Soc. (China)),2005//,33(7):832-6 摘要: Indium oxide nanopowder doped with 5% (in mass) La2O3 was prepared by an impregnation method and using In2O3 obtained by a microemulsion technique. The structure and morphology of the powder product were characterized by X-ray diffraction and transmission electron microscopy, respectively. Gas sensing properties of In2O3 samples were measured by a gas match method at the static state. The results show that the homogeneous indium oxide nanopowder sintering at 600 °C were obtained by sintering at 600 °C and its particle size is about 30 nm. Pure indium oxide gas sensor has higher sensitivity to alcohol, gasoline and HCHO, but it has poor gas selectivity. At different working temperatures, La2O3 doped indium oxide sensor can selectively detect alcohol and gasoline with satisfactory gas sensitivity and quick response and recovery characteristics 关键词: crystal morphology;gas sensors;indium compounds;lanthanum compounds;microemulsions;nanoparticles;nanotechnology;particle size;sintering;transmission electron microscopy;X-ray diffraction;microemulsion;gas sensing;indium oxide nanopowder sintering;impregnation method;powder structure;powder morphology;X-ray diffraction;transmission electron microscopy;gas match method;particle size;alcohol;gasoline;600 degC;30 nm;In2O3:La2O3