Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 28, Issue 9, Pages 1801-1808Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2007.11.018
Keywords
screen printing; electron microscopy; impedance; ZrO2 fuel cells
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Screen printing pastes based on organic binder systems were developed for the production of dense electrolyte layers of Y0.16Zr0.84O1.92(8YSZ) on Ni/YSZ anode substrates for anode supported solid oxide fuel cells (SOFCs). Pastes with a solid loading up to 50 vol.% (86 wt.%) of YSZ powder and the adequate thixotropic behaviour for screen printing could be produced. Dense layers were obtained by sintering at 1430 degrees C and were shown to be gas tight by window and He leakage test. The electrical conductivity of the dense layers and the resulting activation energy (96-99 kJ mol(-1)) were obtained from impedance spectra in the temperature range from 250 degrees C to 900 degrees C. The agreement with literature values indicates that performing layers have been obtained. (C) 2008 Elsevier Ltd. All rights reserved.
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