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Material Development and Processing of Multiscale Structured Ceramics for SOFC-Electrodes


Neukam, Matthias ; Panneerselvam, Marudhachalam ; Willert-Porada, Monika:
Material Development and Processing of Multiscale Structured Ceramics for SOFC-Electrodes.
In: Paulino, Glaucio H. (Hrsg.): Multiscale and functionally graded materials : proceedings of the international conference, FGM IX, Oahu Island, Hawaii, 15-18 October 2006. - Melville, N.Y. : American Institute of Physics , 2008 . - S. 748-753 . - (AIP Conference Proceedings ; 973 )
ISBN 978-0-7354-0492-2
DOI: https://doi.org/10.1063/1.2896875


NiO-ZrO₂-cermets are used as anode material in Solid Oxide Fuel Cells. A sub-structured cermet consisting aligned lamella of NiO and 8Y-ZrO₂ is obtained by melt processing of a eutectic powder mixture. Direct co-firing of such cermet powders with the ceramic electrolyte layer requires sintering temperatures above 1600 °C and leads to redistribution of NiO. Sintering with AlN as reactive component for in-situ formation of cubic ZrxOyNz, promotes joining of the sub-structured anode material with the solid electrolyte via the ionic conductive 8Y-ZrO₂-grains at 1400-1550 °C. By decomposition of the Zr-oxynitride upon cooling, new porosity and the desired connectivity between the anode and the solid electrolyte is formed. A graded composite is obtained at an interface, which consists of e.g., ZrO₂, Zr7O9.5N3, beta-ZrAlON, NiAl2O4 and Ni, depending upon the sintering temperature.

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Publikationsform: Aufsatz in einem Buch
Begutachteter Beitrag: Ja
Keywords: Solid-oxide fuel cells; Ceramics in electrochemistry; Electrodes; Material processing; Porous materials; Granular materials
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren > Lehrstuhl Werkstoffverarbeitung - Univ.-Prof. Dr. Monika Willert-Porada
Fakultäten > Fakultät für Ingenieurwissenschaften > Ehemalige Professoren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 04 Sep 2017 12:41
Letzte Änderung: 04 Sep 2017 12:41
URI: https://eref.uni-bayreuth.de/id/eprint/14528