J. Phys. IV France 123 (2005) 131-135
Sintering of kaolin in presence of ferric compound: Study by ultrasonic echographyN.S. Soro1, P. Blanchart1, J.P. Bonnet1, J.M. Gaillard1, M. Huger1 and A. Touré2
1 G.E.M.H. - ENSCI, 47 avenue Albert-Thomas, 87065 Limoges Cedex, France
2 Laboratoire de Chimie Minérale, Univ. de Cocody 22, BP. 582, Abidjan 22, Côte d'Ivoire
Fine particle of iron compound has been obtain by precipitation of ferric ions in a kaolin suspension. Theses particules located on the kaolinite platelets surface, were transformed into hematite near 300 C during a thermal treatment in air. This hematite located on platelets surface, influences the thermal evolution of kaolinite only after the formation of metakaolin: it did not affect dehydroxylation process, but the structural reorganisation peak were strongly modified.
© EDP Sciences 2005