%0 Journal Article
%T CO2 Selective Potentiometric Sensor in Thick-film Technology
%A Kathy Sahner
%A Anne Schulz
%A Jaroslaw Kita
%A Rotraut Merkle
%A Joachim Maier
%A Ralf Moos
%J Sensors
%D 2008
%I MDPI AG
%R 10.3390/s8084774
%X A potentiometric sensor device based on screen-printed Nasicon films was investigated. In order to transfer the promising sensor concept of an open sodium titanate reference to thick film technology, ˇ°sodium-richˇ± and ˇ°sodium-poorˇ± formulations were compared. While the ˇ°sodium-richˇ± composition was found to react with the ion conducting Nasicon during thermal treatment, the ˇ°sodium-poorˇ± reference mixture was identified as an appropriate reference composition. Screen-printed sensor devices were prepared and tested with respect to CO2 response, reproducibility, and cross-interference of oxygen. Excellent agreement with the theory was observed. With the integration of a screen-printed heater, sensor elements were operated actively heated in a cold gas stream.
%K Ion conductor
%K solid-state reference
%K electrochemical sensor.
%U http://www.mdpi.com/1424-8220/8/8/4774