caa a22 4500 463227727 CHVBK 20180405153232.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s10853-007-2099-3 doi (NATIONALLICENCE)springer-10.1007/s10853-007-2099-3 Mixed conducting oxides Y x Zr1− x − y Ti y O2− x /2 (YZT) and corresponding Ni/YZT cermets as anode materials in an SOFC [Elektronische Daten] [X. Mantzouris, N. Zouvelou, V. Haanappel, F. Tietz, P. Nikolopoulos] The physical properties of mixed-conducting oxides in the ternary system Y2O3-ZrO2-TiO2 with the general formula Y x Zr1−x−y Ti y O2−x/2 (YZT, where 0.133<x<0.25 and 0<y<0.15) are presented and evaluated in terms of an application as anode materials in solid oxide fuel cells (SOFCs). The total electrical conductivity of the ceramics with cubic fluorite structure in air mainly depends on the Ti content and decreases at 900°C by about one order of magnitude from y=0 to y=0.15. Comparing the conductivity of contributions at 900°C in Ar/4% H2 the highest contributions of electronic conductivity were obtained for y=0.15. For the Ni/YZT cermets, the enhanced adherence at the metal/ceramic interface, compared to Ni/8YSZ (8mol% yttria stabilised zirconia), results in a better long-term stability in terms of electrical conductivity and microstructure after 1,000h of annealing at 1,000°C in reducing atmosphere. The electrochemical performance, tested in fuel cells with Ni/8YSZ, Ni/Y0.20Zr0.75Ti0.05O1.9 and Ni/Y0.20Zr0.70Ti0.10O1.9 anodes, decreased for Ni/Y0.20Zr0.70Ti0.10O1.9 under steam reforming conditions, most likely due to the reduced ionic conductivity of this specific YZT ceramic. Springer Science+Business Media, LLC, 2007 Mantzouris X. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut Zouvelou N. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut Haanappel V. Forschungszentrum Jülich GmbH, Institut für Energieforschung (IEF), 52425, Julich, Germany aut Tietz F. Forschungszentrum Jülich GmbH, Institut für Energieforschung (IEF), 52425, Julich, Germany aut Nikolopoulos P. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10152-10159 0022-2461 42:24<10152 2007 42 10853 https://doi.org/10.1007/s10853-007-2099-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-2099-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mantzouris X. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut NATIONALLICENCE 700 1- Zouvelou N. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut NATIONALLICENCE 700 1- Haanappel V. Forschungszentrum Jülich GmbH, Institut für Energieforschung (IEF), 52425, Julich, Germany aut NATIONALLICENCE 700 1- Tietz F. Forschungszentrum Jülich GmbH, Institut für Energieforschung (IEF), 52425, Julich, Germany aut NATIONALLICENCE 700 1- Nikolopoulos P. Department of Chemical Engineering, University of Patras, 26504, Patras, Greece aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/24(2007-12-01), 10152-10159 0022-2461 42:24<10152 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer