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Yttria-stabilized barium zirconate surface reactivity at elevated temperatures

Published online by Cambridge University Press:  16 June 2020

Märtha M. Welander ,
Daniel J. Goettlich ,
Tanner J. Henning  and
Robert A. Walker Open the ORCID record for Robert A. Walker [Opens in a new window]
Märtha M. Welander
Affiliation:
Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT59715, USA
Daniel J. Goettlich
Affiliation:
Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT59715, USA Montana Materials Science Program, Montana State University, Bozeman, MT59715, USA
Tanner J. Henning
Affiliation:
Montana Materials Science Program, Montana State University, Bozeman, MT59715, USA
Robert A. Walker*
Affiliation:
Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT59715, USA Montana Materials Science Program, Montana State University, Bozeman, MT59715, USA
*
Address all correspondence to Robert A. Walker at rawalker@montana.edu
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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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Type
Research Letters
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MRS Communications , Volume 10 , Issue 3 , September 2020 , pp. 455 - 460
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Copyright © Materials Research Society, 2020

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