Chapter 45. Improved Calcination Process of Barium Calcium Niobate Bcn18 and Its in Situ Application to Thermal Spraying

  1. Waltraud M. Kriven and
  2. Hua-Tay Lin
  1. Sascha Kuehn,
  2. Sigmar Janes and
  3. Rolf Clasen

Published Online: 27 MAR 2008

DOI: 10.1002/9780470294802.ch45

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3

How to Cite

Kuehn, S., Janes, S. and Clasen, R. (2003) Improved Calcination Process of Barium Calcium Niobate Bcn18 and Its in Situ Application to Thermal Spraying, in 27th Annual Cocoa Beach Conference on Advanced Ceramics and Composites: A: Ceramic Engineering and Science Proceedings, Volume 24, Issue 3 (eds W. M. Kriven and H.-T. Lin), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294802.ch45

Author Information

  1. Department of Powder Technology Saarland University, Buildung 43A 66123 Saarbruecken Germany

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2003

ISBN Information

Print ISBN: 9780470375839

Online ISBN: 9780470294802

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Keywords:

  • oxygen-ion conductivity;
  • solid electrolytes;
  • gadolinium doped ceria;
  • ceramic films;
  • hydrocarbons

Summary

Problems arising by the solid-state reaction in the Ba3Ca1, 18Nb1, 82O9, (BCN18) system with perowskite structure are discussed. BCN18 is an interesting material for use in solid oxide fuel cells (SOFC) due to its high protonic conductivity at moderate temperatures. Trouble arises by the high solubility of BCN18-components in common crucible materials at temperatures above 1350 °C. This can be gathered from phase diagrams. Thus common crucible materials fail. Therefore the use of platinum crucibles is recommended. In this paper transformation of BCN18 to cubic phase at a temperature as low as 1350°C was investigated by extending the dwell time. Furthermore, a method of omitting the third calcining step by plasma spraying the hexagonal powders is presented.