| Gas sensitive properties of nanometer materials In_2O_3 synthesized by chemical precipitation |
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| 作者单位： | Institute of Materials Shanghai University Shanghai 200072 P.R. China College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 P.R. China，College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 P.R. China，College of Materials and Chemical Engineering Zhengzhou University of Light Industry Zhengzhou 450002 P.R. China，Institute of Materials Shanghai University Shanghai 200072 P.R. China |
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| 摘 要： | 1IntroductionSemiconductor metal oxides as chemical sensingmaterials have been extensively studied for a longti medue to their advantageous features,such as good sen-sitivity to the ambient conditions and si mplicity infabrication[1].Among them,it has bee…
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Gas sensitive properties of nanometer materials In_2O_3 synthesized by chemical precipitation |
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| XU Jia-qiang CHEN Yu-ping ZHU Dong-mei SHEN Jia-nian. Gas sensitive properties of nanometer materials In_2O_3 synthesized by chemical precipitation[J]. Journal of Shanghai University(English Edition), 2006, 0(5) |
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| Authors: | XU Jia-qiang CHEN Yu-ping ZHU Dong-mei SHEN Jia-nian |
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| Affiliation: | XU Jia-qiang CHEN Yu-ping ZHU Dong-mei SHEN Jia-nian1. Institute of Materials,Shanghai University,Shanghai 200072,P.R. China2. College of Materials and Chemical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,P.R. China |
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| Abstract: | In_2O_3 nanoparticles were prepared from or with different indium salts by chemical precipitation under the conditions of various pH values. The crystal structure and ceramic microstructure of the samples were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that the mean grain size of In_2O_3 is less than 100 nm, and their particle homogeneity and dispersibility are satisfactory. The gas sensitivity defined as R_a/R_g was detected in a static system. The results show that the sensors made by as-prepared nanoparticles has high sensitivity to many gases such as alcohol, HCHO, NH_3, et al. The response time is less than 20 s and the recovery time is lower than 30 s. |
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| Keywords: | indium oxide nanoparticle gas sensor chemical precipitation. |
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