Title :
Thick and thin film p-type conducting perovskite hydrocarbon sensors - a comparative study
Author :
Sahner, Kathy ; Moos, Ralf ; Matam, Mahesh ; Post, Mike
Author_Institution :
Functional Mater., Bayreuth Univ., Germany
Abstract :
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.
Keywords :
chemical sensors; gas sensors; organic compounds; strontium compounds; 350 to 450 degC; Sr(Ti1-xFex)O3-δ; Sr(Ti1-xFex)O3-δ conductometric sensors; cross interference experiments; differential gas diffusion; p-type conducting perovskite hydrocarbon sensors; propane; sensor response; thick-film devices; thin-film devices; Gas detectors; Hydrocarbons; Iron; Strontium; Temperature distribution; Temperature sensors; Thick film sensors; Thick films; Thin film sensors; Titanium compounds;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1279078
