Compositional dependence of electrical conductivity of Ce_(1-x)Tb_xO_(2-δ)(0 ≤ x ≤ 1)

摘要

Well dispersed Ce_(1-x)Tb_xO_(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.