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Article
Yttrium and hydrogen superstructure and correlation of lattice expansion and proton conductivity in the BaZr0.9Y0.1O2.95 proton conductor
Applied Physics Letters
  • A. Braun, Laboratory for High Performance Ceramic
  • A. Ovalle, Laboratory for High Performance Ceramic
  • V. Pomjakushin, Laboratory for Neutron Scattering
  • A. Cervellino, Swiss Light Source,
  • S. Erat, Laboratory for High Performance Ceramic
  • Wayne C. Stolte, University of Nevada, Las Vegas
  • T. Graule, Laboratory for High Performance Ceramic
Document Type
Article
Publication Date
1-1-2009
Abstract

Bragg reflections in Y-resonant x-ray diffractograms of BaZr0.9Y0.1O2.95 (BZY10) reveal that Y is organized in a superstructure. Comparison with neutron diffraction superstructure reflections in protonated/deuterated BZY10 suggests that both superstructures are linked, and that protons move in the landscape imposed by the Y. The thermal lattice expansion decreases abruptly for protonated BZY10 at T≥648±20 K, coinciding with the onset of lateral proton diffusion and suggesting a correlation of structural changes and proton conductivity. The chemical shift in the Y L1-shell x-ray absorption spectra reveals a reduction from Y3+ toward Y2+ upon protonation.

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Copyright American Institute of Physics, used with permission
Citation Information
A. Braun, A. Ovalle, V. Pomjakushin, A. Cervellino, et al.. "Yttrium and hydrogen superstructure and correlation of lattice expansion and proton conductivity in the BaZr0.9Y0.1O2.95 proton conductor" Applied Physics Letters Vol. 95 Iss. 224103 (2009) p. 4
Available at: http://works.bepress.com/wayne_stolte/24/