Interaction of NiO with yttria-stabilized zirconia

A. Kuzjukevics, Søren Linderoth

    Research output: Contribution to journalJournal articleResearch

    Abstract

    As-prepared and heat treated plasma-produced 8 and 10 mol% yttria-stabilized zirconia (YSZ) powders doped with 0, 5, 10 and 75 mol% NiO have been investigated by XRD. The as-prepared powders are mixtures of metastable tetragonal and cubic phases but they transform to a single YSZ phase upon heat treatment above 1200 degrees C. The solubility of NiO in yttria-stabilized zirconia is less than 2 mol% at 1600 degrees C and varies little within the investigated yttria concentration range. The solubility increases with increasing temperature and the total NiO concentration. The activation energy of the solubility is about 0.25 eV.
    Original languageEnglish
    JournalSolid State Ionics
    Volume93
    Issue number3-4
    Pages (from-to)255-261
    ISSN0167-2738
    DOIs
    Publication statusPublished - 1997

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