7. The Influence of Beta-Eucryptite Glassceramics on the Structure and Main Properties of Alumina Ceramics

  1. Edgar Lara-Curzio and
  2. Michael J. Readey
  1. James A. Geodakyan,
  2. Aram K. Kostanyan,
  3. Karen J. Geodakyan,
  4. Svetlana T. Sagatelyan and
  5. Berta V. Petrosyan

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291191.ch7

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4

How to Cite

Geodakyan, J. A., Kostanyan, A. K., Geodakyan, K. J., Sagatelyan, S. T. and Petrosyan, B. V. (2004) The Influence of Beta-Eucryptite Glassceramics on the Structure and Main Properties of Alumina Ceramics, in 28th International Conference on Advanced Ceramics and Composites B: Ceramic Engineering and Science Proceedings, Volume 25, Issue 4 (eds E. Lara-Curzio and M. J. Readey), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291191.ch7

Author Information

  1. Scientific-Research and Production Enterprise of Materials Science 17 Charents Street, Yerevan 375025, Republic of Armenia

Publication History

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

ISBN Information

Print ISBN: 9780470051528

Online ISBN: 9780470291191

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Keywords:

  • thermal expansion;
  • nuclear energy;
  • cosmonautics;
  • thermal expansion coefficient;
  • glassceramics

Summary

An influence of β-eucryptite glassceramics on the sintering ability, sintering mechanisms, and structure of alumina ceramics has been researched by methods of DTA, TG, DTG, XRD, dilatometry, optical and electronic microscopy. The thermal incompatibility between Al2O3 and β-eucryptite glassceramics that results from the difference between their thermal coefficients of expansion (TEC) has been overcome by use of superfine powders and thorough blending of the base mixture. A phase composition, microstructure, TEC, mechanical and electrical properties, and thermal-shock resistance of alumina ceramics containing β-eucryptite glassceramics have been determined.

A possibility of replacing β-eucryptite glassceramics by the equivalent amount of Li2O·2SiO2 containing glass or a mixture of Li2CO3 [Russian text ignored] SiO2 powders has been demonstrated.