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利用溶胶-凝胶法合成了固溶体Ce1-xPrxO2-δ(x=0.05～0.30).X射线衍射(XRD)分析表明,在x≤0.30的范围内形成了单相萤石结构固溶体Ce1-xPrxO2-δ;X射线光电子能谱(XPS)结果表明,样品中氧缺位浓度随掺杂量增大而增大,铈离子主要为Ce4+离子,镨离子以混合价态Pr3+和Pr4+存在;拉曼光谱(Raman)观察到两个峰,458cm-1峰为特征F2g振动谱带,较宽的570cm-1峰与样品中氧离子缺位有关;交流阻抗谱测试表明,固溶体Ce1-xPrxO2-δ的电导率随掺杂量增加而增大,x=0.2时,电导率达到最大,活化能较低,σ600℃=3.28×10-2S/cm,σ700℃=6.06×10-2S/cm,Ea=0.54eV(250～650℃),Ea=0.49eV(650～800℃).
The solid solution Ce1-xPrxO2-δ (x = 0.05 ~ 0.30) was synthesized by sol-gel method.The XRD results show that the solid solution Ce1-xPrxO2- δ. The results of X-ray photoelectron spectroscopy (XPS) showed that the concentration of oxygen vacancies increased with the increase of doping amount, while the cerium ions were mainly Ce4 + ions and the praseodymium ions were present in mixed valence states of Pr3 + and Pr4 + (Raman). The peak at 458cm-1 is characteristic of the F2g vibrational band. The wider 570cm-1 peak is related to the lack of oxygen ions in the sample. The results of AC impedance spectroscopy show that the conductance of Ce1-xPrxO2-δ The rate of conductivity increases with the increase of doping amount. When x = 0.2, the conductivity reaches the maximum, the activation energy is low, σ600 ℃ = 3.28 × 10-2S / cm, σ700 ℃ = 6.06 × 10-2S / cm, Ea = 0.54 eV (250-650 ° C), Ea = 0.49eV (650-800 ° C).