Texturation of model clay materials using tape casting and freezing

Abstract : The present work aimed to investigate the processing of textural clay based materials using tape casting together with freezing. Two model raw materials were used, namely: BIP kaolin from France and ABM montmorillonite from Mediterranean region. The mixtures of both clays were studied, whereby, the amount of montmorillonite was 0, 5, 10, 20 or 50 mass%. After tape casting, the as-obtained green bands were frozen into liquid nitrogen, lyophilized and then fired at 1050 °C or 1200 °C. The amount of montmorillonite appeared as a critical parameter that controls the cohesion of the dry products. For montmorillonite content ≥20 mass%, the products exhibited multiple cracks after lyophilisation. With lower montmorillonite content, the cohesion of the dry products was satisfactorily and a macroscopic cross-linked surface texturation was observed. After calcination at 1050 °C or 1200 °C, the texturation appeared well defined. Moreover, calcination at 1200 °C increased the densification of products and the occurrence of a glassy phase was noted. The combination of both tape casting and freezing (freeze tape casting) is a promising way to develop various clay-based and composites materials exhibiting unique microstructure organization and characteristics with potential application in the field sustainable and environmentally friendly filtration, adsorption or catalysis.
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https://hal-unilim.archives-ouvertes.fr/hal-01116617
Contributeur : Fabrice Rossignol <>
Soumis le : vendredi 13 février 2015 - 17:12:23
Dernière modification le : lundi 22 janvier 2018 - 14:36:02

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Gisèle Laure Lecomte-Nana, Amina Mokrani, Nicolas Tessier-Doyen, Kévin Boussois, Hervé Goure-Doubi. Texturation of model clay materials using tape casting and freezing. Ceramics International, Elsevier, 2013, 39 (8), pp.9047-9053. ⟨10.1016/j.ceramint.2013.04.108⟩. ⟨hal-01116617⟩

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