In Situ Electrical Impedance Imaging of Paste During Extrusion Revealing Structure of Extrudate

Robert M West1, David M Scott2, Gregg Sunshine2, Jacek Kostuch3, Lasse Heikkinen4 Rhouzhou Hou5, and Richard A Williams5

1Nuffield Institute, University of Leeds, 71–75 Clarendon Road, Leeds, LS2 9PL, UK

2DuPont Central Research and Development, Experimental Station, Wilmington, DE 19880-0304, USA

3IMERYS, John Keay House, St Austell, Cornwall, PL 25 4DJ, UK

4Department of Applied Physics, University of Kuopio, PO Box 1627 FIN-70211, Finland 5Centre for Particle and Colloid Engineering, School of Process, Environmental and Process Engineering, University of Leeds, Leeds, LS2 9JT, UK, Email: r.m.west@leeds.ac.uk

ABSTRACT

A case study is presented where electrical impedance tomography is used not only to image paste during extrusion but also to characterize a key aspect of its behaviour, that of phase separation.

Keywords Impedance tomography, 3D imaging, paste extrusion, phase separation