Compositional dependence of electrical conductivity of Ce1−xTbxO2−δ (0⩽x⩽1)

Well dispersed Ce1−xTbxO2−δ nano-powders were synthesized by using the carbonate coprecipitation method in an entire compositional range of 0⩽x⩽1, which allowed the preparation of highly dense pellets by sintering at 1673 K and the systematical study of the electrical conductivity in such a wide compositional range. It was found that the conductivity increased with increasing Tb concentration except that of x=0.80. Secondary phase were observed by using X-ray diffraction in the samples with x⩾0.80, which might have negative impact on the conductivity of the samples.