Аннотация:The compounds have been synthesized and the emf and resistivity measurements have been carried out between 400° and 1000°C. It is found that charge carriers of conduction in these compounds are oxygen ions above 600°C; the oxygen transference number being above 0.95 for all measured compounds. The resistivity value for is 15 ohm‐cm at 750°C which compares with that of calcia stabilized zirconia at 1000°C. It is found that the dependence of the resistivity on temperature is described by
