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

Well dispersed Ce 1− x Tb x O 2− 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.