Acta Phys. -Chim. Sin. ›› 2001, Vol. 17 ›› Issue (09): 832-835.doi: 10.3866/PKU.WHXB20010915

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Properties and Mechanism of Nanostructure Thick Film Materials Based on ( Sn,Sb )O2-x

Hui Chun;Xu Ai-Lan   

  1. Research Institute of Micro/Nanometer Science and Technology,Shanghai Jiaotong University,Shanghai 200030
  • Received:2001-01-04 Revised:2001-04-02 Published:2001-09-15
  • Contact: Hui Chun E-mail:chhui@xidian.edu.cn

Abstract: The influence of Sb5+ ions on SnO2x crystallinity and gassensing properties of the sensors based on the SnO2x powders prepared by hydrothemal synthesis technique was investigated by XRD and TEM.The results show that the doping of Sb5+ ions in the ranges of (2.9~5.8×10-6) makes the grains of the SnO2x a short column in shape and plays an important role in decreasing the resistance values in air (Ra) for the sensor and controlling the sensitivity to CH4,CO,C2H5OH and H2.Finally,the surface electronic defect effect and the size effect of SnO2x crystallite in nanometer level were discussed to understand the gas sensing mechanism of sensors based on the(Sn,Sb)O2x nanostructure thick film materials.

Key words: SnO2-x, Nanostructure, Gas sensing material, Mechanism