Influence of the ice front velocity and of the composition of suspensions on thermal properties of bentonite materials prepared using freeze–casting process

Anthony de Marcos; Benoît Nait-Ali; Nicolas Tessier-Doyen; Arnaud Alzina; Cécile Pagnoux; Claire Peyratout

Influence of the ice front velocity and of the composition of suspensions on thermal properties of bentonite materials prepared using freeze–casting process

Anthony de Marcos ¹ Benoît Nait-Ali ¹ Nicolas Tessier-Doyen ¹ Arnaud Alzina ¹ Cécile Pagnoux ² Claire Peyratout ¹

1 GEMH - Groupe d'Etudes des Matériaux Hétérogènes

2 SPCTS-AXE1 - Axe 1 : procédés céramiques

SPCTS - Science des Procédés Céramiques et de Traitements de Surface

Abstract : The influence of (i) the ice front velocity in the freeze–casting process as well as the addition of two binders, (ii) the inorganic synthetic mineral laponite and (iii) the natural organic oligomer chitosan, on the microstructure and on thermal conductivity of bentonite materials prepared using the freeze–casting process were investigated by scanning electron and interferometric microscopies and the laser flash method. Prior to measurements, materials physico-chemical characteristics were determined using specific surface area, grain size and density measurements. Results show that the width of the strongly oriented pores obtained with the freeze–casting process is modified by the presence of binders, and that in turn, the thermal conductivity and anisotropy are also significantly modified.

Keywords : Porous ceramics Laser flash technique Phyllosilicates Anisotropic materials

Type de document :

Article dans une revue

Domaine :

Chimie / Matériaux

Liste complète des métadonnées

https://hal-unilim.archives-ouvertes.fr/hal-01115749
Contributeur : Fabrice Rossignol <>
Soumis le : mercredi 11 février 2015 - 16:57:26
Dernière modification le : mercredi 14 février 2018 - 16:02:06

Influence of the ice front velocity and of the composition of suspensions on thermal properties of bentonite materials prepared using freeze–casting process

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Influence of the ice front velocity and of the composition of suspensions on thermal properties of bentonite materials prepared using freeze–casting process

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