Crystal structure and proton conductivity of BaZr0.9Sc0.1O3-delta

Istaq Ahmed, Maths Karlsson, Sten-Gunnar Eriksson, Elisabet Ahlberg, Christopher S. Knee, Kristian Larsson, Abul K. Azad, Aleksandar Matic, Lars Borjesson

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Solid-state sintering has been used to prepare the perovskite BaZr0.9Sc0.1O3-delta. Analysis of X-ray powder diffraction data shows that an increase of the unit cell parameter, a, was observed after deuteration. Rietveld analysis of room-temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm-3m). Dynamic thermogravimetric analysis indicates that the hydration process occurs below 335 degrees C and approximately 58% of the theoretical number of protonic defects can be filled. The presence of protons/deutrons is seen from the strong O-H/O-D stretch band in the infrared spectrum of the hydrated/deuterated samples. The proton conductivity of a prehydrated sample was investigated under dry and wet Ar atmospheres.

Original languageEnglish
Pages (from-to)3039-3044
Number of pages6
JournalJournal of the American Ceramic Society
Volume91
DOIs
Publication statusPublished - Sept 2008

Keywords

  • TRANSPORT-PROPERTIES
  • POWDER DIFFRACTION
  • PEROVSKITE OXIDE
  • DOPED BAZRO3
  • CONDUCTORS
  • BACEO3
  • NEUTRON
  • STABILITY
  • DIFFUSION
  • HYDROGEN

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