Characterization of Ce0.9Gd0.1O1.95 powders synthesized by spray drying

Peter Blennow Tullmar, Weiwu Chen, Mats Lundberg, Mohan Menon

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    Abstract

    Ce0.9Gd0.1O1.95 powders were synthesized by spray drying and successive calcinations. The phase purity, BET surface area, and particle morphology of as-sprayed and calcined powders were characterized. After calcination above 300 °C, the powders were single phase and showed a BET surface area of 68 m2/g when calcined at 300 °C. The conductivity, in air, of sintered pellets was measured by electrochemical impedance spectroscopy (EIS) and it was found to be comparable with literature values. The activation energy for the total conductivity was around 0.83 eV. The powder calcined at lower temperature showed better sinterability and higher total conductivity due to an increased bulk conductivity.
    Original languageEnglish
    JournalCeramics International
    Volume35
    Issue number7
    Pages (from-to)2959-2963
    ISSN0272-8842
    DOIs
    Publication statusPublished - 2009

    Keywords

    • Solid Oxide Fuel Cells
    • Fuel Cells and hydrogen

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