添加剂对SnO2气敏材料敏感特性的影响

Journal of Applied Sciences ›› 1993, Vol. 11 ›› Issue (2): 104-108.

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INFLUENCE OF ADDITIVES ON GAS SENSITIVE CHARACTER OF TIN OXIDES

ZHU WENHUI, XU JIAQIANG, YAN KEQIU

Zhengzhou Institute of Light Industry

Received:1991-08-30 Revised:1992-02-03 Online:1993-06-30 Published:1993-06-30

Abstract

Abstract: In this paper, chemical co-precipitation and impregnation are adopted to make gas sensitive, SnO₂ by doping it with 15 additives. The structure and component of the materials are then studied with TEM, XED and XPS, and the gas sensitive character ia tested by means of static state. Results show that SnO₂ doped with Ag, CuO and ZnO, which are cheap, can be used to make inflammable gas sensors; that the doping of ZnO and Re₂O₃ can improve the alcohol selectivity of SnO₂; that Sb₂O₃ markedly reduces the electrical resistance of SnO₂; and that there exist phase reactions between the addtives Ag, CeO₂ and the material SnO₂, thus influencing the binding energy of Sn3d.

Key words: gas-sensing materials, additives, gas-sensing, mechanism, Tin oxides

ZHU WENHUI, XU JIAQIANG, YAN KEQIU. INFLUENCE OF ADDITIVES ON GAS SENSITIVE CHARACTER OF TIN OXIDES[J]. Journal of Applied Sciences, 1993, 11(2): 104-108.

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INFLUENCE OF ADDITIVES ON GAS SENSITIVE CHARACTER OF TIN OXIDES

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