Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7148386 | Sensors and Actuators B: Chemical | 2013 | 5 Pages |
Abstract
In this article, electrical characterization of a 'La0.8Sr0.2CrO3/YSZ/Pt' non-Nernstian propylene gas sensor is reported. The effect of the concentration of the test gas (25-200 ppm) on the sensor response was studied using impedance spectroscopy and current-voltage curves. For a fixed operating temperature of 510° C, the interfacial resistance was seen to decrease with increase in the analyte concentration. A 48% reduction in interfacial resistance has been observed when switched from air to 200 ppm of propylene. I-V studies show a non-linear relationship. The slope of the curves around zero current matches the resistances measured by ac impedance. The controlled interface sensor design facilitated impedancemetric and potentiometric sensing schemes.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Praveen K. Sekhar, Kumar Subramaniyam,