The chemical stability of Ba0.8Ce0.85-xZrxTb0.15O3-delta (0.1 0.3. The stable sintered material is obtained with total electrical conductivity of 0.0189 S.cm(-1) for the composition Ba0.8Ce0.35Zr0.5Tb0.15O3-delta in moist reducing atmosphere at 900 degrees C. So, in the present work, we report a composition which shows excellent stability in pure CO2 atmosphere at high temperature without much compromising its ionic conductivity
