Chapter 11. Structural Study and Conductivity of BaZr0.90Ga0.10O2.95

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Istaq Ahmed1,
  2. Elisabet Ahlberg1,
  3. Sten Eriksson2,
  4. Christopher Knee3,
  5. Maths Karlsson3,
  6. Aleksandar Matic3 and
  7. Lars Börjesson3

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch11

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

How to Cite

Ahmed, I., Ahlberg, E., Eriksson, S., Knee, C., Karlsson, M., Matic, A. and Börjesson, L. (2008) Structural Study and Conductivity of BaZr0.90Ga0.10O2.95, in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 (eds N. P. Bansal, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291337.ch11

Author Information

  1. 1

    Department of Chemistry, Gothenburg University, Gothenburg, SE-412 96, Sweden

  2. 2

    Department of Environmental Inorganic Chemistry, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden

  3. 3

    Department of Applied Physics, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080542

Online ISBN: 9780470291337

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Keywords:

  • hydrocarbons;
  • protons;
  • spectroscopy;
  • monochromator;
  • polynomial

Summary

Traditional solid state sintering has been used to prepare the perovskite BaZr0.9Ga0.1O2.95. Analysis of X-ray powder diffraction data shows that a decrease of the unit cell parameter a was observed compared to the undoped BaZrO3, which confirms successful substitution of Ga3+ for Zr4+ at the B site. Rietveld analysis of room temperature neutron powder diffraction data confirmed cubic symmetry (space group Pm-3m) for both as- prepared and deuterated BaZr0.90Ga0.10O2.95 samples. The strong O-H stretch band (2500-3500 cm−1) in the infrared absorbance spectrum clearly manifests the presence of protons in the pre-hydrated material. The bulk and total conductivities of prehydrated BaZr0.9Ga0.1O2.95 are 1.17 × 10−5 and 3.55 × 10−6 Scm−1, respectively at 400°C, which are more than one order of magnitude higher than for dried a sample at the same temperature. In contrast, the total conductivity of pre-hydrated and dried samples is similar at higher temperature, e. g. T > 800 °C. The higher activation energy (e. g. 0.7 eV) for pre-hydrated sample compared to typical value (0.4-0.5 eV) of proton conduction may suggest that the protons are trapped in the material.