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Cellular ceramics from emulsified suspensions of mixed particles

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Abstract

In this work concentrated alumina suspensions have been emulsified with decane using silica nanoparticles of a range of hydrophobicities as stabiliser giving rise to novel porous ceramic materials. The materials are characterized by open porosities between 49 and 61% and average cell sizes between 18 and 25 μm. Comparison with surfactant-stabilized emulsified suspensions is given. In particular, high temperature strength is a key property of the particle-stabilized materials.

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Acknowledgments

The authors would like to thank DFG for funding this project within the Research Training Group 1375 ‘‘Nonmetallic Porous Structures for Physical–Chemical Functions’’ and Wacker-Chemie (Germany) for the supply of the fumed silica powders.

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Authors and Affiliations

  1. CASC, Department of Materials, Imperial College London, London, SW7 2AZ, UK

    Suelen Barg

  2. Keramische Werkstoffe und Bauteile, University of Bremen, 28359, Bremen, Germany

    Suelen Barg, Hailing Wang, Dietmar Koch & Georg Grathwohl

  3. Surfactant and Colloid Group, Department of Chemistry, University of Hull, Hull, HU6 7RX, UK

    Bernard P. Binks

  4. Deutsches Zentrum für Luft- und Raumfahrt e.V. in der Helmholtz-Gemeinschaft, Institut für Bauweisen- und Konstruktionsforschung, 70569, Stuttgart, Germany

    Dietmar Koch

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  1. Suelen Barg
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  2. Bernard P. Binks
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  3. Hailing Wang
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  4. Dietmar Koch
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  5. Georg Grathwohl
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Correspondence to Suelen Barg or Bernard P. Binks.

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Barg, S., Binks, B.P., Wang, H. et al. Cellular ceramics from emulsified suspensions of mixed particles. J Porous Mater 19, 859–867 (2012). https://doi.org/10.1007/s10934-011-9541-2

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