Chapter 2. Barium Titanate and Barium Orthotitanate Powders Through An Ethylene Glycol Polymerization Route

  1. Ersan Ustundag and
  2. Gary Fischman
  1. Sang-Jin Lee,
  2. Michael D. Biegalski and
  3. Waltraud M. Kriven

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294567.ch2

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3

How to Cite

Lee, S.-J., Biegalski, M. D. and Kriven, W. M. (1999) Barium Titanate and Barium Orthotitanate Powders Through An Ethylene Glycol Polymerization Route, in 23rd Annual Conference on Composites, Advanced Ceramics, Materials, and Structures : A: Ceramic Engineering and Science Proceedings, Volume 20, Issue 3 (eds E. Ustundag and G. Fischman), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294567.ch2

Author Information

  1. Department of Materials Science and Engineering University of Illinois at Urbana-Champaign Urbana, IL. 61801

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 1999

ISBN Information

Print ISBN: 9780470375631

Online ISBN: 9780470294567

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Keywords:

  • barium orthotitanate;
  • barium titanate;
  • monoclinic;
  • transformation;
  • titanium alkoxide

Summary

Nano-size and pure barium titanate and barium orthotitanate powders were synthesized by simple, mixed-oxide, ceramic processing using ethylene glycol. Barium nitrate and titanium isopropoxide were directly dissolved in ethylene glycol in stoichiometric proportions. The organic/inorganic precursors were crystallized to tetragonal barium titanate and monoclinic barium orthotitanate, after calcining at 700 °C for 1 h and at 1200 °C for 1 h, respectively. A dense barium titanate microstructure which had a nano-scale grain size was obtained by sintering at 1200 °C for 2 h. In barium orthotitanate, a phase transformation from orthorhombic to monoclinic symmetry occurred. The transformation temperature and volume change were determined by dilatometry. The high temperature orthorhombic phase was retained down to room temperature by addition of at least 6 wt% MgO stabilizer.