【作者】 林晓敏； 孙嘉苓； 朱丽丽； 苏文辉；

【Author】 LIN Xiao-min~(1,2),SUN Jia-ling~1,ZHU Li-li~1,SU Wen-hui~2 (1.College of Physics,Beihua University,Jilin 132013,China; 2.College of Physics,Jilin University,Changchun 130023,China)

【机构】 北华大学物理学院； 吉林大学物理学院；

【摘要】 利用X射线衍射（XRD）,拉曼光谱（Ra-man）,原子力显微镜（AFM）和交流阻抗谱对溶胶-凝胶法制备的稀土双掺杂Ce_0.9 Dy_0.1-xPO_1.95（x=0.02,0.05,0.08）固溶体的结构和电性能进行了研究。XRD结果表明经800℃焙烧所有样品都形成了单相立方萤石结构;Raman谱结果表明Ce_0.9 Dy_0.1-xPr_xO_1.95（x=0.02,0.05,0.08）具有氧缺位的立方萤石结构,Pr离子的掺杂有利于氧缺位增加;原子力显微镜（AFM）表明Pr³⁺的掺入使材料晶粒变小,致密性增加;交流阻抗谱表明Ce_0.9Dy_0.1-xPr_xO_1.95（x=0.02,0.05,0.08）样品中Ce_0.9Dy_0.02Pr_0.08O_1.95的电导率最大(σ₆₀₀℃=7.15×10^-3 S·cm^-1),导电活化能最小（E_a=0.69eV）,这与其更多的氧离子缺位和较高的致密性有关。更多还原

【Abstract】 Structure and electrical properties of rare earth co-doped ceria Ce_0.9Dy_0.1-xPr_xO_1.95（x = 0.02,0.05, 0.08） solid solutions synthesized by sol-gel method were characterized by X-ray diffraction（XRD）,Raman spectroscopy, Atom force microscopy（AFM） and AC impedance spectroscopy.XRD measurement showed that all samples calcined at 800℃crystallized in single cubic fluorite structure.The Raman spectra analysed that the solid solution Ce_0.9Dy_0.1-xPr_xO_1.95 were cubic fluorite structure with the oxygen vacancies.The oxygen vacancy concentration could be increased by doped Pr in Ce_0.9Dy_0.1-xPr_xO_1.95.AFM image indicated that the grain size became small and the relative density was increased by doped Pr³⁺ in the material Ce_0.9Dy_0.1O_1.95.AC impedance spectra showed that Ce_0.9Dy_0.02Pr_0.08O_1.95 possessed maximum conductivity and mimimum activation energy(σ₆₀₀℃=7.15×10^-3S·cm^-1,E_a =0.69eV) among samples Ce_0.9Dy_0.1-xPr_xO_1.95（x-=0.02,0.05,0.08）,which was assigned to its more oxygen vacancy concentration and higher dense microstructure.更多还原