Propane Gas Detector Using SnO2 Doped with Nb, V, Ti, or Mo

Abstract

The propane gas concentration vs. its detection voltage characteristics have been investigated on SnC>2 doped with several transition metals. Doping with Nb, V, Ti, or Mo gives rise to a quite different behavior from the so-called Freundlich curve; that is, an inflection anomaly on the curve of the characteristics is found. The inflection point shifts toward lower gas concentration with increasing applied voltage. A remarkable jump of detection voltage observed for Nb-doped samples is also described. © 1978, The Electrochemical Society, Inc. All rights reserved.