SOME EVIDENCES ON THE INSTABILITY OF Cr-Cr2O3 ELECTRODE IN THE ELECTROCHEMICAL OXYGEN SENSORS AT STEELMAKING TEMPERATURES.

Abstract

Anomalies are observed in measurements of electromotive force and electric conductivity of solid oxide electrolyte cells involving Cr(s)-Cr//2O//3(s) electrodes. Transformation in the system at about 1,653 K is suggested to explain the anomalies on the basis of measured temperature dependencies and total and electronic conductivities of the cells.