SOLID STATE OXYGEN SENSOR

摘要

A potentiometric oxygen sensor (10) is formed having a logarithmic response to a differential oxygen concentration while operating as a Nerstian-type sensor. Very thin films of mixed conducting oxide materials form electrode services while permitting diffusional oxygen access to the interface between the zirconia electrolyte (12) and the electrode (18). Diffusion of oxygen through the mixed oxide (14) is not rate-limiting. Metal electrodes (16, 18) are note used so that morphological changes in the electrode structure do not occur during extended operation at elevated temperatures.