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Rheological properties of montmorillonitic clay suspensions: Effect of firing and interlayer cations

Authors :
Jean-Pierre Bonnet
Gisèle Laure Lecomte-Nana
Sylvie Rossignol
Fayza Gridi-Bennadji
Groupe d'Etudes des Matériaux Hétérogènes (GEMH)
Université de Limoges (UNILIM)-Institut des Procédés Appliqués aux Matériaux (IPAM)
Université de Limoges (UNILIM)-Université de Limoges (UNILIM)
Axe 3 : organisation structurale multiéchelle des matériaux (SPCTS-AXE3)
Science des Procédés Céramiques et de Traitements de Surface (SPCTS)
Institut des Procédés Appliqués aux Matériaux (IPAM)
Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Institut des Procédés Appliqués aux Matériaux (IPAM)
Université de Limoges (UNILIM)-Université de Limoges (UNILIM)-Ecole Nationale Supérieure de Céramique Industrielle (ENSCI)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)
Rossignol, Sylvie
Source :
Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809-2817. ⟨10.1016/j.jeurceramsoc.2011.11.018⟩
Publication Year :
2012
Publisher :
HAL CCSD, 2012.

Abstract

International audience; The effect of a prior firing of three montmorillonite clays, exhibiting different nature of interlayer cations, on the rheological behaviour of related aqueous suspensions (5 and 10. mass% of solid content) was examined. Calcinations were performed at 150 °C, 250 °C, 300 °C or 450 °C for 30 min. The rheological properties were characterized at 25 °C in the flow mode using the Herschel-Bulkley model. The alkaline interlayer cation (Na) tended to increase the yield stress of montmorillonite suspensions in comparison with earth-alkaline ones (Ca, Mg). As expected, increasing solid content led to increasing yield stress. For calcinations until 200 °C, the relevant suspensions exhibited an increasing yield stress due to a gel-like behaviour in relation with a card-house-like structure. Furthermore, calcination above 300 °C favoured the decrease of the corresponding yield stress. This behaviour seemed to be related to the modification of the surface properties of the clay platelets, more precisely to the beginning of clay dehydroxylation.

Details

Language :
English
ISSN :
09552219
Database :
OpenAIRE
Journal :
Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809, Journal of the European Ceramic Society, Elsevier, 2012, 32 (11), pp.2809-2817. ⟨10.1016/j.jeurceramsoc.2011.11.018⟩
Accession number :
edsair.doi.dedup.....d819fc85f2f886b60aab7991db296801