THE ELECTROLYTIC PROPERTIES OF LAYO3 AND LAALO3 DOPED WITH ALKALINE-EARTH OXIDES

The electrolytic properties of two perovskite oxides, LaYO3 and LaAlO3, doped with alkaline-earth cations have been studied. Conductivity measurements show that doped-LaYO3 is a p-type semiconductor at high oxygen partial pressures, but becomes a pure oxide-ion conductor at low oxygen partial pressures. EMF measurements of oxygen concentration cells confirm that both doped LaAlO3 and doped LaYO3 are pure oxide-ion conductors at low oxygen pressures.