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000053121 084__ $$2WoS$$aChemistry, Physical
000053121 084__ $$2WoS$$aPhysics, Condensed Matter
000053121 1001_ $$0P:(DE-Juel1)129637$$aMeulenberg, W. A.$$b0$$uFZJ
000053121 245__ $$aPreparation of proton conducting BaCe0.8Gd0.2O3 thin films
000053121 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2006
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000053121 520__ $$aThin films of BaCe0.8Gd0.2O3 were prepared by solid state reaction of two screen-printed layers over porous substrates. The first layer consists of the oxygen ion conductor Ce0.8Gd0.2O2 with a fluorite structure, whereas the top layer consists of BaCO3. After decomposition of the carbonate, BaO reacts with Ce0.8Gd0.2O2 forming the perovskite oxide BaCe0.8Gd0.2O3-delta with protonic conductivity. The in-situ reaction and densification on the porous substrates results in gastight thin layers of 10 to 50 pm and allows overcoming the problems due to the poor sinterability of the proton conductor. Two different porous substrates prepared by warm-pressing were studied as membrane supports, i.e., (i) porous composite NiO-Zr0.85Y0.15O2, commonly employed as solid oxide fuel cell anode and (ii) porous Ce0.8Gd0.2O2 oxide. The structural properties of the layer, compositional gradients and occurring phases are described, as well as water uptake, gastightness (He leaking rate) and emf measurement. Protonic conducting membranes are particularly suited not only for hydrogen separation combined with reforming and water-gas-shift converters but also as a protonic fuel cell electrolyte. (c) 2006 Elsevier B.V. All rights reserved.
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000053121 65320 $$2Author$$aproton conductor
000053121 65320 $$2Author$$aperovskite
000053121 65320 $$2Author$$amembrane
000053121 65320 $$2Author$$ahydrogen separation
000053121 65320 $$2Author$$abarium cerate
000053121 7001_ $$0P:(DE-Juel1)VDB55636$$aSerra, J. M.$$b1$$uFZJ
000053121 7001_ $$0P:(DE-Juel1)VDB3067$$aSchober, T.$$b2$$uFZJ
000053121 773__ $$0PERI:(DE-600)1500750-9$$a10.1016/j.ssi.2006.08.025$$gVol. 177, p. 2851 - 2856$$p2851 - 2856$$q177<2851 - 2856$$tSolid state ionics$$v177$$x0167-2738$$y2006
000053121 8567_ $$uhttp://dx.doi.org/10.1016/j.ssi.2006.08.025
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