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Author(s): |
Xiao-min Lin, College of Physics, Beihua University, jilin, Jilin city, China, 132013
Jia-ling Shun, College of Physics, Beihua University, jilin, Jilin city, China, 132013
Li-li Zhu, College of Physics, Beihua University, jilin, Jilin city, China, 132013 |
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Abstract: |
Structure and electrical properties of rare earth co-doped ceria Ce0.9Dy0.1–xPrxO1.95 (x=0.02, 0.05, 0.08) electrolyte materials 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 Ce0.9Dy0.1–xPrxO1.95 were cubic fluorite structure with the oxygen vacancies. The oxygen vacancy concentration could be increased by doped Pr in Ce0.9Dy0.1O1.95. AFM image indicated that the grain size became small and the relative density was increased by doped Pr3+ in the material Ce0.9Dy0.1O1.95. AC impedance spectra showed that Ce0.9Dy0.02Pr0.08O1.95 possessed maximum conductivity and mimimum activation energy (σ600 oc = 7.15×10–3 S.cm–-1, Ea=0.69eV) among Ce0.9Dy0.1–xPrxO1.95 (x=0.02, 0.05，0.08) samples, which was assigned to its more oxygen vacancy concentration and higher dense microstructure.
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