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Sensors 2008, 8(8), 4774-4785; doi:10.3390/s8084774

CO2 Selective Potentiometric Sensor in Thick-film Technology

1
Functional Materials Laboratory, University of Bayreuth, 95440 Bayreuth, Germany
2
Max-Planck-Institut für Festkörperforschung, Stuttgart, Germany
*
Author to whom correspondence should be addressed.
Received: 2 July 2008 / Revised: 8 August 2008 / Accepted: 8 August 2008 / Published: 19 August 2008
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Abstract

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. View Full-Text
Keywords: Ion conductor; solid-state reference; electrochemical sensor. Ion conductor; solid-state reference; electrochemical sensor.
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Sahner, K.; Schulz, A.; Kita, J.; Merkle, R.; Maier, J.; Moos, R. CO2 Selective Potentiometric Sensor in Thick-film Technology. Sensors 2008, 8, 4774-4785.

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