Chapter 42. Sintering of Bace0.85Y0.15O3-δ WITH/WITHOUT SrTiO3

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. Dopant F. Dynys,
  2. A. Sayir and
  3. P. J. Heimann

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291184.ch42

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

Dynys, D. F., Sayir, A. and Heimann, P. J. (2004) Sintering of Bace0.85Y0.15O3-δ WITH/WITHOUT SrTiO3, 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.ch42

Author Information

  1. NASA Glenn Research Center/ CWRU1 /OAI2 21000 Brookpark Rd. Cleveland, OH 44135 USA

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:

  • XRD;
  • SEM;
  • COP;
  • protonic conduction;
  • solid state synthesis

Summary

The perovskite composition, BaCe0.85Y0.15O3-δ, displays excellent protonic conduction at high temperatures making it a desirable candidate for hydrogen separation membranes. This paper reports on the sintering behavior of BaCe0.85Y0.15O3-δ powders doped with SrTiO3. Two methods were used to synthesize BaCe0.85Y0.15O3-δ powders: (1) solid state reaction and (2) wet chemical co-precipitation. Co-precipitated powder crystallized into the perovskite phase at 1000 °C for 4 hrs. Complete reaction and crystallization of the perovskite phase by solid state was achieved by calcining at 1200 °C for 24 hrs. Solid state synthesis produce a coarser powder with a average particle size of 1.3 μm and surface area of 0.74 m2/g. Co-precipitation produced a finer powder with a average particle size of 65 nm and surface area of 14.9 m2/g. Powders were doped with 1, 2, 5 and 10 mole % SrTiO3. Samples were sintered at 1450 °C, 1550 °C and 1650 °C. SrTiO3 enhances sintering, optimal dopant level is different for powders synthesized by solid state and co-precipitation. Both powders exhibit similar grain growth behavior. Dopant levels of 5 and 10 mole % SrTiO3 significantly enhances the grain size.