Chapter 4. Effect of Liquid Phase on the PTCR Behavior of BaTiO3

  1. William Smothers
  1. K. R. Udayakumar,
  2. K. G. Brooks,
  3. J. A. T. Taylor and
  4. V. R. W. Amarakoon

Published Online: 27 MAR 2008

DOI: 10.1002/9780470320419.ch4

14th Automotive Materials Conference: Ceramic Engineering and Science Proceedings, Volume 8, Issue 9/10

14th Automotive Materials Conference: Ceramic Engineering and Science Proceedings, Volume 8, Issue 9/10

How to Cite

Udayakumar, K. R., Brooks, K. G., Taylor, J. A. T. and Amarakoon, V. R. W. (2008) Effect of Liquid Phase on the PTCR Behavior of BaTiO3, in 14th Automotive Materials Conference: Ceramic Engineering and Science Proceedings, Volume 8, Issue 9/10 (ed W. Smothers), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470320419.ch4

Author Information

  1. NYS College of Ceramics Alfred University Alfred, NY 14802

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 1987

ISBN Information

Print ISBN: 9780470374740

Online ISBN: 9780470320419

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Keywords:

  • ferroelectric;
  • diameter;
  • microscopy;
  • spectrum;
  • titanium

Summary

The role of stoichiometry and additives on the PTCR behavior of Y- and Nb-doped BaTiO3 ceramics has been derived from interrelationships between composition, processing conditions, microstructural development, and electrical properties. The formation of a liquid phase for compositions containing TiO2 excess and those containing SiO2 has been shown to aid in improving the room-temperature resistivity. The distribution of this liquid phase, due to interfacial effects taking place during annealing and cooling stage, and the presence of acceptors such as Mn, have been shown to control the resistivity jump at TC.