Chapter 53. Ionic Conductivity in the Bi2O3- Al2O3-MxOy (M=Ca, Y) System

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. Yi-Tzuen Liu and
  2. Tzer-Shin Sheu

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291184.ch53

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3

How to Cite

Liu, Y.-T. and Sheu, T.-S. (2004) Ionic Conductivity in the Bi2O3- Al2O3-MxOy (M=Ca, Y) System, in 28th International Conference on Advanced Ceramics and Composites A: Ceramic Engineering and Science Proceedings, Volume 25, Issue 3 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291184.ch53

Author Information

  1. Department of Materials Science and Engineering I-Shou University, Kaohsiung, Taiwan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2004

ISBN Information

Print ISBN: 9780470051498

Online ISBN: 9780470291184

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Keywords:

  • ionic conductivity;
  • mixed oxide powders;
  • specimens obtained;
  • excellent oxygen;
  • co-precipitated powders

Summary

A two-phase composite of BiAlO3 plus Bi2O3 was sintered at 700–850°C from the mixed oxide powders and the co-precipitated powders. with the mixed oxide powders as the starting materials, the sintered and heat-treated Bi2O3-containing samples contained Bi2Al4O9 γ-Bi2O3, r-Bi2O3 and δ-Bi2O3, but not BiAlO3. However, the sintered specimens obtained from the co-precipitated powders only had a very small amount of BiAlO3. It indicated that Bi2Al4O9 was much easier to form than BiAlO3. From the electrical conductivity measurement, these solid electrolytes with δ-Bi2O3, BiAlO2, or Bi2Al4O9 all had an excellent ionic conductivity at high temperatures, approximately 410−2 S/cm at 700°C. Except for a major content of Bi2O3 and Al2O3, these solid electrolytes also had a minor Y2O3 or CaO content. the correlations among ionic conductivity, phase existence, and the minor dopant content were also discussed.