Abstract
Under conditions of applied current flow, oxygen can be transported through a ZrO2 sensor so as to create a localized, relatively oxygen-rich atmosphere at the measuring electrode and thereby provide protection for the sensor in hostile reducing atmospheres. The rate of dissipation of this protective atmosphere can be controlled by the use of a porous ceramic muffle around the sensor's measuring electrode. Analysis of the output signal from the sensor not only allows the oxygen content in the bulk atmosphere to be determined, but can also yield much useful information relevant to the operation of the sensor, such as the onset of electrode limiting and electronic conduction.
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References
A. G. Knapton,Platinum Met. Rev. 23 (1979) 2.
W. E. Borbidge and P. T. Whelan,J. Appl. Electrochem. 13 (1983) 519.
R. V. Allen, W. E. Borbidge and P. T. Whelan, Science and Technology of Zirconia IIAdvances in Ceramics 12 (1984) 537.
P. T. Whelan and W. E. Borbidge,Solid State Ionics 9, 10 (1983) 1263.
E. C. Subbarao and H. S. Maiti,11 (1984) 317.
H. Yanagida, R. J. Brook and F. A. Kroger,J. Electrochem. Soc. 117 (1970) 593.
W. J. Fleming, Society of Automotive Engineers, Paper 800020 (1980).
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Whelan, P.T., Borbidge, W.E. Interpretation of the output signal from a zirconia oxygen sensor operating under applied current. J Appl Electrochem 18, 188–195 (1988). https://doi.org/10.1007/BF01009261
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DOI: https://doi.org/10.1007/BF01009261