Interpretation of the electrical properties of a SnO2 gas sensor after treatment with sulfur dioxide

Abstract : It has recently been established that the electrical properties of tin oxide are greatly modified after a sulfur dioxide treatment at 500°C. According to the type of gas present in the atmosphere, its electrical conductance curves as a function of temperature exibit maxima at different temperatures. Such a maximum may be understood in terms of potential barrier at the SnO2 metal junction and in terms of a chemical reaction which induces an increase of the sample's conductance at low temperature. The surface states of SnO2 , and consequently the nature of the water vapour present on the surface, are greatly affected by the gaseous treatment.
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Sensors and Actuators, Elsevier, 1984, 6 (2), pp.119-125. 〈10.1016/0250-6874(84)85005-2〉
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Soumis le : jeudi 19 novembre 2009 - 11:18:48
Dernière modification le : mercredi 29 novembre 2017 - 10:06:53

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René Lalauze, Dai Nghia Bui, Christophe Pijolat. Interpretation of the electrical properties of a SnO2 gas sensor after treatment with sulfur dioxide. Sensors and Actuators, Elsevier, 1984, 6 (2), pp.119-125. 〈10.1016/0250-6874(84)85005-2〉. 〈emse-00433405〉

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