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Fabrication of ice-templated tubes by rotational freezing: Microstructure, strength, and permeability

Abstract : We demonstrate a facile and scalable technique, rotational freezing, to produce porous tubular ceramic supports with radially aligned porosity. The method is based on a conventional ice-templating process in a rotatory mold and demonstrated here with yttria-stabilized zirconia (YSZ). We investigated the effects of solid loading, freezing temperature, and volume of the slurry on the microstruc-ture, strength (o-ring test and four-point bending), and air permeability. The results show that pore volume and pore size can be controlled by the solid loading and freezing temperature respectively, and overall tube thickness can be adjusted by the volume of slurry initially poured into the mold. Decreasing pore size and pore volume increases the mechanical properties but decreases the air permeability. These tubes could be particularly interesting as tubular membrane supports such as oxygen transport membranes.
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https://hal.umontpellier.fr/hal-01675123
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Dernière modification le : jeudi 16 septembre 2021 - 12:40:03
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Jordi Seuba, Jérôme Leloup, Stephane Richaud, Sylvain Deville, Christian Guizard, et al.. Fabrication of ice-templated tubes by rotational freezing: Microstructure, strength, and permeability. Journal of the European Ceramic Society, Elsevier, 2017, 37 (6), pp.2423-2429. ⟨10.1016/j.jeurceramsoc.2017.01.014⟩. ⟨hal-01675123⟩

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