CO2 Selective Potentiometric Sensor in Thick-film Technology

Sensors

Kathy Sahner²  Anne Schulz²  Jaroslaw Kita²  Rotraut Merkle¹  Joachim Maier¹ 

[1] Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany;Functional Materials Laboratory, University of Bayreuth, 95440 Bayreuth, Germany

关键词: Ion conductor;    solid-state reference;    electrochemical sensor;   

DOI  :  10.3390/s8084774

来源: mdpi

【 摘 要 】

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, “sodium-rich” and “sodium-poor” formulations were compared. While the “sodium-rich” composition was found to react with the ion conducting Nasicon during thermal treatment, the “sodium-poor” 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.

【 授权许可】

CC BY   
© 2008 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.