Extrusion of alumina and cordierite-based tubes containing aluminium-rich anodising sludge

MJ Ribeiro, Stuart Blackburn, JM Ferreira, JA Labrincha

Research output: Contribution to journalArticle

26 Citations (Scopus)


An Al-rich anodising sludge has been used as the feedstock to produce alumina and cordierite-based tubes produced by extrusion. The extrudability is strongly dependent on the materials composition and on the resultant plasticity of the pastes. For the process to be successful, the design and operating conditions need to be considered in detail. In this work, the effect of die design, ram speed and pressure was evaluated using the Benbow-Bridgwater model of paste extrusion. In general, predicted and measured values were in good agreement. This approach revealed differences in the flow between the two ceramic formulations and it was possible to relate the rheological observations during extrusion to the quality of the final product. (c) 2005 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)817-823
Number of pages7
JournalJournal of the European Ceramic Society
Issue number4-5
Publication statusPublished - 1 Jan 2006


  • alumina
  • extrusion


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