Effect of non-stoichiometry on optical, radiative, and thermal characteristics of ceria undergoing reduction

Vincent M. Wheeler, José I. Zapata, Peter B. Kreider, Wojciech Lipiński*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    The complex refractive index of ceria has been determined at ambient temperature using variable angle spectroscopic ellipsometry for two chemical states—fully oxidized and partially reduced. The ellipsometric model is corroborated with complementary measurements of thickness, surface roughness, and chemical composition. Partially reduced ceria is shown to have a larger absorption index over a broad spectral range than fully oxidized ceria, including the visible and near IR regions. We use a simple model of a directly irradiated particle entrained in a gas flow to demonstrate the consequences of accounting for changes in chemical state when modeling ceria-based thermochemical process.

    Original languageEnglish
    Pages (from-to)A360-A373
    JournalOptics Express
    Volume26
    Issue number10
    DOIs
    Publication statusPublished - 14 May 2018

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