Journal
CERAMICS INTERNATIONAL
Volume 35, Issue 6, Pages 2329-2335Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2009.01.008
Keywords
Extrusion; Electrical conductivity; ZrO2; Fuel cells; Tubular electrolyte
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Funding
- Spanish Agency CICYT [MAT2004-03070-C05-02, MAT2007-64486-C07-06]
- Regional Government of Madrid (MATERY-ENER Programme [S-505/PPQ-0358]
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In this work the processing steps for producing YSZ thin tubes by means of powder extrusion moulding (PEM) technique are investigated. Different feedstocks were prepared from a commercial YSZ powder and a multicomponent thermoplastic binder system based in polypropylene and paraffin wax. The surface coating of YSZ powder with stearic acid in a high-performance dispersing instrument reduces the viscosity of the feedstock one order of magnitude respect to a feedstock with a same composition and un-coated powder. This fact allows increasing the solid loading up to 58 vol.% to obtain sintering tubes with densities higher than 97% and with wall thickness lower than 200 mu m. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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