Colloid Chemical Control of Kaolinite Properties Related to Ceramic Processing

Lyudmyla A. Pavlova1 and Michael J. Wilson2
1 Institute of Colloid and Water Chemistry, National Academy of Sciences of Ukraine, L. Gavro St. 14, Apt. 104, Kiev-210, 254210, Ukraine
2 Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen, AB15 8QH, Scotland, United Kingdom

Abstract: Experimental data on structure formation in highly concentrated aqueous dispersions of kaolinite were analyzed using rheological models. The physicochemical properties of the clay mineral surface were studied during heating at a range of temperatures, and correlation of acid-base properties with physicomechanical characteristics of the spatial structures formed during heating was obtained. It was shown that interparticle interactions and plastic yield mechanisms under load are dependent upon interfacial phenomena. A method for estimating optimal structural parameters was developed for semidry dispersions, enabling regulation of physicochemical and mechanical properties of ceramic mixtures during processing.

Key Words: Acid-Base Interfacial Interactions • Ceramic Processing • Electroconductivity • Interparticle Interactions • Kaolinite • Optimal Structures • Silicoorganic Liquids • Surface Modification

Clays and Clay Minerals; February 1999 v. 47; no. 1; p. 36-43; DOI: 10.1346/CCMN.1999.0470104
© 1999, The Clay Minerals Society
Clay Minerals Society (www.clays.org)