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Thick and thin film p-type conducting perovskite hydrocarbon sensors - a comparative study

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4 Author(s)
Sahner, K. ; Functional Mater., Bayreuth Univ., Germany ; Moos, R. ; Matam, M. ; Post, M.

Hydrocarbon sensitivity of a series of p-type conducting strontium titanate-ferrate, Sr(Ti1-xFex)O3-δ conductometric sensors was investigated It was shown that in the temperature range between 350°C and 450°C, the resistance of thick film and thin film devices changes considerably in the presence of propane. The sensor response is rapid and reversible. However, cross interference experiments show a different behaviour of thick and thin film sensors when exposed to hydrogen. A model for this behaviour based on differential gas diffusion into the sensor material is proposed.

Published in:

Sensors, 2003. Proceedings of IEEE  (Volume:2 )

Date of Conference:

22-24 Oct. 2003