Abstract
Material changes in yttrium-doped barium zirconate, BaZr0.8Y0.2O3–x, were studied using in situ Raman spectroscopy and ex situ x-ray photoelectron spectroscopy analysis. During in situ Raman analysis, samples were heated to temperatures of 300–600 °C and exposed to both dry and humidified H2 atmospheres. At the lower temperatures (300–450 °C), a new vibrational peak appears in the Raman spectra during exposure to humidified H2. The appearance of this feature is reversible, dependent on previous sample history, and possibly results from new, secondary phase formation or lattice distortion.
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The authors gratefully acknowledge support from the National Science Foundation (CHE-1710695). R.A.W. acknowledges additional instrumentation support from the Office of Naval Research (N00014-17-2808).
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The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.38
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Welander, M.M., Goettlich, D.J., Henning, T.J. et al. Yttria-stabilized barium zirconate surface reactivity at elevated temperatures. MRS Communications 10, 455–460 (2020). https://doi.org/10.1557/mrc.2020.43
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DOI: https://doi.org/10.1557/mrc.2020.43