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Preparation and Electrical Properties of New Oxide Ion Conductors Ce6−xGdxMoO15− (0.0≤x≤1.8)

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A series of oxide ion conductors Ce6−xGdxMoO15− (0.0≤x≤1.8) have been prepared by the sol–gel method. Their properties were characterized by differential thermal analysis/thermogravimetry (DTA/TG), X-ray diffraction (XRD), Raman, IR, X-ray photoelectron spectroscopy (XPS), and AC impedance spectroscopy. The XRD patterns showed that the materials were single phase with a cubic fluorite structure. The conductivity of Ce6−xGdxMoO15− increases as x increases and reaches the maximum at x=0.15. The conductivity of Ce4.5Gd1.5MoO15− is t=3.6 × 10−3 S/cm at 700°C, which is higher than that of Ce4.5/6Gd1.5/6O2− (t=2.6 × 10−3 S/cm), and the corresponding activation energy of Ce4.5Gd1.5MoO15− (0.92 eV) is lower than that of Ce4.5/6Gd1.5/6O2− (1.18 eV).
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Document Type: Research Article

Affiliations: 1: Bioengineering College, Changchun Technical School, Changchun 130012, Jilin, China 2: Key Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, Jilin, China

Publication date: May 1, 2009

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