Preparation and characterization of Yb-doped Ba(Ce,Zr)O3 nanopowders with high sinterability

Nafisah Osman, Ibrahim Abu Talib, Hamidi Abd Hamid

    Research output: Contribution to journalArticle

    17 Citations (Scopus)

    Abstract

    The Ba(Ce0.8Zr0.2)0.95Yb0.05O2.975 ceramics electrolyte was prepared via a Pechini method using metal nitrate salts as starting materials. An optimum annealing temperature of 1,400 °C was needed to obtain a pure perovskite-like phase with orthorhombic structure. Particle size distribution showed a bimodal distribution that corresponds to the loose powders and agglomerates size. Scanning electron micrograph revealed that the loose powders were in the nanosize range (70-200 nm). These ultrafine loose powders enhanced the densification of a pellet with relative density ~95% obtained at 1,400 °C. The sample formed clear and compact grains with submicron sizes. Impedance results showed that the impedance semicircle of the grain was observed only at T ≤ 250 °C. The introduction of 20 mol% Zr improved the chemical stability of BaCe0.95Yb0.05O2.975 sample in atmosphere containing carbon dioxide at 600 °C. The sample also exhibited high proton conductivity in wet hydrogen.

    Original languageEnglish
    Pages (from-to)561-569
    Number of pages9
    JournalIonics
    Volume16
    Issue number6
    DOIs
    Publication statusPublished - Jul 2010

    Fingerprint

    Powders
    preparation
    impedance
    Proton conductivity
    Chemical stability
    densification
    particle size distribution
    Densification
    pellets
    Carbon Dioxide
    Particle size analysis
    Nitrates
    Perovskite
    Electrolytes
    nitrates
    carbon dioxide
    Hydrogen
    Carbon dioxide
    Salts
    Metals

    Keywords

    • Grain size
    • Impedance
    • Perovskite
    • Powder chemical preparation

    ASJC Scopus subject areas

    • Chemical Engineering(all)
    • Engineering(all)
    • Materials Science(all)
    • Physics and Astronomy(all)

    Cite this

    Preparation and characterization of Yb-doped Ba(Ce,Zr)O3 nanopowders with high sinterability. / Osman, Nafisah; Talib, Ibrahim Abu; Hamid, Hamidi Abd.

    In: Ionics, Vol. 16, No. 6, 07.2010, p. 561-569.

    Research output: Contribution to journalArticle

    Osman, Nafisah ; Talib, Ibrahim Abu ; Hamid, Hamidi Abd. / Preparation and characterization of Yb-doped Ba(Ce,Zr)O3 nanopowders with high sinterability. In: Ionics. 2010 ; Vol. 16, No. 6. pp. 561-569.
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