Conductivity study of dense BaCex Zr(0.9-x)Y0.1O(3 − δ) prepared by solid state reactive sintering at 1500 deg. C

Sandrine Ricote, Nikolaos Bonanos, A. Manerbino, W.G. Coors

    Research output: Contribution to journalConference articleResearchpeer-review

    Abstract

    A cost and time effective process was used to prepare the solid solutions BaCexZr(0.9−x)Y0.1O(3−δ) (0 ≤ x ≤ 0.4). 98% dense samples were obtained by solid state reactive sintering at 1500 °C for 4 h, with the addition of 1 wt% of NiO to the quantity of synthesized/sintered compound. Scanning electron micrographs reveal polygonal grains of 1–5 microns, whose size increases from the compound with no cerium (BCZY09) to the samples containing cerium (BCZY18–BCZY45). The conductivity, measured in wet reducing atmosphere (9% H2 in N2, p(H2O) = 0.015 atm) by impedance spectroscopy, increases with the cerium content. Some samples have also been prepared using barium sulfate (BaSO4) as barium precursor (instead of barium carbonate BaCO3) due to its non toxicity. The corresponding samples (prepared at 1575 °C) showed similar properties as the ones prepared with barium carbonate. Furthermore, different geometries (rods, tubes, pellets) could be made.
    Original languageEnglish
    JournalInternational Journal of Hydrogen Energy
    Volume37
    Issue number9
    Pages (from-to)7954-7961
    ISSN0360-3199
    DOIs
    Publication statusPublished - 2012
    Event7th Petite Workshop on the Defect Chemical Nature of Energy Materials - Storaas, Kongsberg, Norway
    Duration: 14 May 201117 May 2011

    Workshop

    Workshop7th Petite Workshop on the Defect Chemical Nature of Energy Materials
    LocationStoraas
    CountryNorway
    CityKongsberg
    Period14/05/201117/05/2011

    Keywords

    • Membranes

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