Supercritical Extraction of Binders from Green Ceramic Compacts

  1. Prof. Dr. G. Müller
  1. T. Chartier1,
  2. E. Delhomme1,
  3. J. F. Baumard1,
  4. Ph. Marteau2 and
  5. R. Tufeu2

Published Online: 27 APR 2006

DOI: 10.1002/3527607293.ch1

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

Ceramics - Processing, Reliability, Tribology and Wear, Volume 12

How to Cite

Chartier, T., Delhomme, E., Baumard, J. F., Marteau, Ph. and Tufeu, R. (2000) Supercritical Extraction of Binders from Green Ceramic Compacts, in Ceramics - Processing, Reliability, Tribology and Wear, Volume 12 (ed G. Müller), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607293.ch1

Editor Information

  1. Fraunhofer-Institut für Silicatforschung, Neunerplatz 2, 97082 Würzburg, Germany

Author Information

  1. 1

    SPCTS-UMR 6638 CNRS, ENSCI, Limoges, France

  2. 2

    LIMHP-UPR CNRS, Institut Galilée, Villetaneuse, France

Publication History

  1. Published Online: 27 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301942

Online ISBN: 9783527607297

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Keywords:

  • ceramics processing;
  • green ceramic compacts;
  • supercritical extraction of binders

Summary

The removal of organic additives from ceramic green parts remains one of the most critical stage in ceramic processing. An original method of extraction of hydrocarbon-type binders, based on the unique dissolving characteristics and transport properties of supercritical fluids, is presented. The binder extraction by supercritical fluid is controlled by two mechanisms, namely the solubilisation of the molecules and the diffusion of dissolved species within the porosity of the green sample. Solubility of a paraffin binder is experimentally determined and a model is developed that takes account of its composition. A second model allows to estimate the kinetics of paraffin binder extraction by supercritical CO2. This original method offers the great advantage of removing binders from ceramic green pieces without melting and without any thermal degradation.