Effect of sintering aids on the electrical properties of Ce 0.9Nd 0.1O 2-δ

Yanjie Xia, Yijia Bai, Xiaojie Wu, Defeng Zhou, Zhongchang Wang, Xiaojuan Liu, Jian Meng

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    10 Citations (Scopus)

    Abstract

    The effect of small addition of different sintering aids (MoO 3 and WO 3) on the electrical properties of Ce 0.9Nd 0.1O 2-δ has been investigated. The (Ce 0.9Nd 0.1) 1-xM xO 2-δ (x = 0.0; M = Mo, W, x = 0.01; Ce 0.9Nd 0.1O 2-δ: NDC, (Ce 0.9Nd 0.1) 0.99Mo 0.01O 2-δ: NDCMo; (Ce 0.9Nd 0.1) 0.99W 0.01O 2-δ: NDCW) solid solutions were prepared and characterized. The X-ray diffraction patterns indicate that all the samples are single phases with a cubic fluorite structure. Moreover, from the field-emission scanning electron microscopy results, it is found (Ce 0.9Nd 0.1) 0.99M 0.01O 2-δ (M = Mo, W) sintered at 1300 °C for 15 h have better sinterability than Ce 0.9Nd 0.1O 2-δ. The total conductivity ( σt) by electrochemical impedance spectroscopy are ranked as: NDCW (σt-NDCW700°C=0.039Scm -1) > NDCMo (σt-NDCMo700°C=0.029Scm -1) > NDC (σt-NDC700°C= 0.018Scm -1) measured at 700 °C, which is attributed to microstructures. It can be concluded that MoO 3 and WO 3 are both effective and WO 3 seems to be more potential as sintering aids on the optimization of electrical properties for ceria-based electrolytes.

    Original languageEnglish
    Pages (from-to)805-808
    Number of pages4
    JournalSolid State Sciences
    Volume14
    Issue number7
    DOIs
    Publication statusPublished - 2012 Jul

    Keywords

    • Doped ceria electrolytes
    • Electrical conductivity
    • Sintering aids

    ASJC Scopus subject areas

    • Chemistry(all)
    • Materials Science(all)
    • Condensed Matter Physics

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