Abstract
The a‐c and d‐c resistances for tetragonal zirconia were measured over the temperature range of 1100°–1500°C and pressure range of 1 to 10−14 atm oxygen. Polarization studies indicated that in oxygen atmospheres an oxygen electrode reaction occurs at the platinum‐zirconia interface so that it is not possible accurately to separate ionic and electronic conduction components from the resistance data. However, the data do indicate a significant ionic conduction component within the pressure and temperature range studied. Assuming that oxygen transport accounts for the ionic conduction some order of magnitude values for oxygen diffusion in zirconia at 1400°C were calculated.
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