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Supported High Temperature Protonic Films Produced by Solid State Reaction

Published online by Cambridge University Press:  26 February 2011

Wilhelm A Meulenberg  and
José M. Serra
Wilhelm A Meulenberg
Affiliation:
[email protected], Forschungszentrum Jülcih, IWV-1, Leo-Brand-Str., Jülich, 52428, Germany, 00492461 616323, 00492461 612455
José M. Serra
Affiliation:
[email protected], Instituto de Tecnologia Quimica (UPV-CSIC), av. Los Naranjos s/n, Valencia, 46022, Spain
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Abstract

This work presents the last progresses in the development of thin oxidic proton conducting electrolytes supported on mixed conducting cermets making use of a solid state reaction. The procedure includes preparation routes applying solid state transformation of an already-gastight oxide layer (typically doped zirconia and ceria) by reacting with an alkali-earths layer (stoichiometric amount) deposited by screen printing on top of that. This kind of supported films can find application as IT-SOFC, H2-membranes and advanced catalytic converters. Thin-film (∼5μm) proton conducting membranes with the nominal composition as for instance BaZr0.85Y0.15O3-δ and BaCe0.8Gd0.2O3-δ were prepared over porous Ni-8YSZ or Ni-CGO substrates by solid state reaction. The produced films are gastight with a homogeneous composition, and showed a highly crystalline cubic perovskite structure. The solid state reaction promoted the formation of (i) a different grain size distribution from 0.1 μm for barium zirconate to 2-3μm for barium cerate, and (b) the formation of a porous fibrous top-layer (for barium zirconate) or a just flat surface (for strontium zirconate), depending on the exact composition of the reacting oxides.

Keywords

ionic conductorZrCe
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 972: Symposium AA – Solid-State Ionics—2006 , 2006 , 0972-AA01-01
Copyright
Copyright © Materials Research Society 2007

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