Porous thick film lanthanum strontium ferrite stress and oxygen surface exchange bilayer curvature relaxation measurements

    Research output: Research - peer-reviewArticle

    • 3 Citations

    Abstract

    Here, the chemical oxygen surface exchange coefficient and film stress of porous La0.6Sr0.4FeO3-δ (LSF64) thick films were simultaneously measured in situ between 275-375°C and 275-700°C, respectively, using a bilayer curvature measurement technique. The magnitude and activation energy of the porous LSF64 thick film oxygen surface exchange coefficients were consistent with those from large grained, bulk samples. However, unlike large-grained, dilatometry-tested bulk LSF64 samples that only exhibited measurable chemical stress above 525°C, the fine-grained, curvature-tested porous LSF64 thick films studied here exhibited measurable chemical stress over the complete temperature range from 275 to 700°C. Further, the porous LSF64 thick films exhibited a kink in their Arrhenius chemical stress behavior (displaying activation energies of 0.07 eV below 525°C and 0.5 eV above 525°C), suggesting a distinct lattice-dominated chemical stress response above 525°C and a distinct grain-boundary-dominated chemical stress response below 525°C.

    LanguageEnglish (US)
    PagesF3025-F3031
    JournalJournal of the Electrochemical Society
    Volume161
    Issue number11
    DOIs
    StatePublished - 2014

    Profile

    lanthanum
    strontium
    thick films
    ferrites
    curvature
    oxygen
    Lanthanum
    Strontium
    Thick films
    Ferrite
    Oxygen
    activation energy
    coefficients
    Activation energy
    dilatometry
    grain boundaries
    temperature
    energy
    Grain boundaries
    Temperature

    ASJC Scopus subject areas

    • Electrochemistry
    • Electronic, Optical and Magnetic Materials
    • Materials Chemistry
    • Surfaces, Coatings and Films
    • Renewable Energy, Sustainability and the Environment
    • Condensed Matter Physics

    Cite this

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    title = "Porous thick film lanthanum strontium ferrite stress and oxygen surface exchange bilayer curvature relaxation measurements",
    abstract = "Here, the chemical oxygen surface exchange coefficient and film stress of porous La0.6Sr0.4FeO3-δ (LSF64) thick films were simultaneously measured in situ between 275-375°C and 275-700°C, respectively, using a bilayer curvature measurement technique. The magnitude and activation energy of the porous LSF64 thick film oxygen surface exchange coefficients were consistent with those from large grained, bulk samples. However, unlike large-grained, dilatometry-tested bulk LSF64 samples that only exhibited measurable chemical stress above 525°C, the fine-grained, curvature-tested porous LSF64 thick films studied here exhibited measurable chemical stress over the complete temperature range from 275 to 700°C. Further, the porous LSF64 thick films exhibited a kink in their Arrhenius chemical stress behavior (displaying activation energies of 0.07 eV below 525°C and 0.5 eV above 525°C), suggesting a distinct lattice-dominated chemical stress response above 525°C and a distinct grain-boundary-dominated chemical stress response below 525°C.",
    author = "Qing Yang and Nicholas, {Jason D.}",
    year = "2014",
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    pages = "F3025--F3031",
    journal = "Journal of the Electrochemical Society",
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    publisher = "Electrochemical Society, Inc.",
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    TY - JOUR

    T1 - Porous thick film lanthanum strontium ferrite stress and oxygen surface exchange bilayer curvature relaxation measurements

    AU - Yang,Qing

    AU - Nicholas,Jason D.

    PY - 2014

    Y1 - 2014

    N2 - Here, the chemical oxygen surface exchange coefficient and film stress of porous La0.6Sr0.4FeO3-δ (LSF64) thick films were simultaneously measured in situ between 275-375°C and 275-700°C, respectively, using a bilayer curvature measurement technique. The magnitude and activation energy of the porous LSF64 thick film oxygen surface exchange coefficients were consistent with those from large grained, bulk samples. However, unlike large-grained, dilatometry-tested bulk LSF64 samples that only exhibited measurable chemical stress above 525°C, the fine-grained, curvature-tested porous LSF64 thick films studied here exhibited measurable chemical stress over the complete temperature range from 275 to 700°C. Further, the porous LSF64 thick films exhibited a kink in their Arrhenius chemical stress behavior (displaying activation energies of 0.07 eV below 525°C and 0.5 eV above 525°C), suggesting a distinct lattice-dominated chemical stress response above 525°C and a distinct grain-boundary-dominated chemical stress response below 525°C.

    AB - Here, the chemical oxygen surface exchange coefficient and film stress of porous La0.6Sr0.4FeO3-δ (LSF64) thick films were simultaneously measured in situ between 275-375°C and 275-700°C, respectively, using a bilayer curvature measurement technique. The magnitude and activation energy of the porous LSF64 thick film oxygen surface exchange coefficients were consistent with those from large grained, bulk samples. However, unlike large-grained, dilatometry-tested bulk LSF64 samples that only exhibited measurable chemical stress above 525°C, the fine-grained, curvature-tested porous LSF64 thick films studied here exhibited measurable chemical stress over the complete temperature range from 275 to 700°C. Further, the porous LSF64 thick films exhibited a kink in their Arrhenius chemical stress behavior (displaying activation energies of 0.07 eV below 525°C and 0.5 eV above 525°C), suggesting a distinct lattice-dominated chemical stress response above 525°C and a distinct grain-boundary-dominated chemical stress response below 525°C.

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    U2 - 10.1149/2.0051411jes

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