Chemical gaseous treatment of SnO₂ for a selective detection of gas

René Lalauze (1, 2) , Dai Nghia Bui (1, 2) , Christophe Pijolat (1, 2)

1 SPIN-ENSMSE - Centre Sciences des Processus Industriels et Naturels
2 MICC-ENSMSE - Département Microsystèmes, Instrumentation et Capteurs Chimiques

Heated at 500°C under a SO₂ air mixture, tin dioxide is sensitized for different gaseous compounds. Selective detector devices can be imagined with sensor heated at different temperatures or with sensors with time programmed cycliing temperature. An interpretation of the electrical phenomenon based on a potential barrier effect associated with a chemical reaction process is proposed.

Mots clés: tin oxide; SnO₂ detector; potential barrier effect

Domaines: Génie des procédés

René Lalauze, Dai Nghia Bui, Christophe Pijolat. Chemical gaseous treatment of SnO₂ for a selective detection of gas. International Meeting on Chemical Sensors, Sep 1983, Fukuoka, Japan. pp.47-52. ⟨emse-00436076⟩