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Mixed Ionic-Electronic Conduction of Na-Beta-Alumina Under the Conditions of a Potentiometric CO2 Sensor

Published online by Cambridge University Press:  10 February 2011

H. Näfe ,
S. Gollhofer  and
F. Aldinger
H. Näfe
Affiliation:
Max-Planck-Institut für Metallforschung, Pulvermetallurgisches Laboratorium, Heisenbergstraße 5 D-70569 Stuttgart, Germany, naefe@aldix.mpi-stuttgart.mpg.de
S. Gollhofer
Affiliation:
Max-Planck-Institut für Metallforschung, Pulvermetallurgisches Laboratorium, Heisenbergstraße 5 D-70569 Stuttgart, Germany
F. Aldinger
Affiliation:
Max-Planck-Institut für Metallforschung, Pulvermetallurgisches Laboratorium, Heisenbergstraße 5 D-70569 Stuttgart, Germany
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Abstract

It is shown that, on employing a practically relevant type of a potentiometric solid state CO2 sensor comprising Na-beta-alumina as solid electrolyte and Na2CO3 as gas sensitive electrode, the voltage response may be remarkably affected by electronic transference. This is in contradiction to what is commonly stated in the literature about the measuring properties of such a type of a sensor. On the other hand, the observation of a non-negligible amount of electronic conduction confirms previous findings on the behaviour of Na-beta-alumina under the conditions of a CO2sensor.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 548: Symposia EE – Solid State Ionics V , 1998 , 521
Copyright
Copyright © Materials Research Society 1999

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References

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