Chapter 26. Thermal Transformations in Kaolinite Clay Minerals

  1. William M. Carty
  1. Caspar J. McConville

Published Online: 26 MAR 2008

DOI: 10.1002/9780470294673.ch26

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2

Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2

How to Cite

McConville, C. J. (2008) Thermal Transformations in Kaolinite Clay Minerals, in Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 22, Issue 2 (ed W. M. Carty), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470294673.ch26

Author Information

  1. New York State College of Ceramics, Alfred University, Alfred, New York

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2001

ISBN Information

Print ISBN: 9780470375723

Online ISBN: 9780470294673

SEARCH

Keywords:

  • kaolinite clay minerals;
  • thermal transformations;
  • transmission electron microscopy;
  • x-ray diffraction;
  • crystallization

Summary

Phase developments occurring in five different ordered and disordered kaolinite clays on heating to different temperatures were studied using transmission electron microscopy and XRD. Of particular interest was the crystallization of new phases on firing to temperatures above 800°C. Kaolinite clay minerals underwent a phase separation on the breakdown of the clay mineral structure, resulting in the formation of spinel, porosity, and a silica-rich liquid phase. The results obtained for the ordered and disordered materials differed in terms of the particle sizes and shapes, and the morphologies of the spinel phases formed.