Impedance characterization of calcia-stabilized zirconia as a function of applied field

Cubic stabilised-zirconias are well-known oxide ion conductors. They are used as solid electrolytes in oxygen sensors and in solid oxide fuel cells (SOFCs). However, it has been demonstrated recently that electronic conduction can be introduced into yttria-stabilised zirconia (YSZ), under the application of either (i) a small dc bias or (ii) for YSZ compositions with higher yttria content, by an increase in oxygen partial pressure (pO2) [1]. Such electronic conduction will have implications for materials that are to be used as ionically-conducting but electrically-insulating components in fuel cells and sensors. Please click Additional Files below to see the full abstract