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

Title data

Neukam, Matthias ; Panneerselvam, Marudhachalam ; Willert-Porada, Monika:
Material Development and Processing of Multiscale Structured Ceramics for SOFC-Electrodes.
In: Paulino, Glaucio H. (ed.): 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 . - pp. 748-753 . - (AIP Conference Proceedings ; 973 )
ISBN 978-0-7354-0492-2
DOI: https://doi.org/10.1063/1.2896875

Abstract in another language

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.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: Solid-oxide fuel cells; Ceramics in electrochemistry; Electrodes; Material processing; Porous materials; Granular materials
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Ehemalige Professoren > Chair Materials Processing - Univ.-Prof. Dr. Monika Willert-Porada
Faculties
Faculties > Faculty of Engineering Science > Ehemalige Professoren
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 04 Sep 2017 12:41
Last Modified: 04 Sep 2017 12:41
URI: https://eref.uni-bayreuth.de/id/eprint/14528