Title: On the chemical interaction of nanoscale lanthanum doped strontium titanates with common scandium and yttrium stabilized electrolyte materials
Authors : Burnat, Dariusz Artur
Heel, Andre
Holzer, Lorenz
Otal, Eugenio H.
Kata, Dariusz
Graule, Thomas J.
Published in : International Journal of Hydrogen Energy
Volume(Issue) : 37
Issue : 23
Pages : 18326
Pages to: 18341
Publisher / Ed. Institution : Elsevier Ltd
Issue Date: 2012
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 540: Chemistry
620.11: Engineering materials
Abstract: Chemical interactions between common electrolyte materials and various La doped strontium titanates (LST), which are redox-stable candidates for SOFCs anodes, were thoroughly investigated. The reactions of nanosized reagents were studied by SEM/EDX microscopy and XRD with subsequent Rietveld refinement. It was found that all A-site deficient LSTs promoted a reaction with Sc and Y stabilized zirconia, whilst stoichiometric LST was chemically stable. Detected structural and microstructural changes were solely assigned to high mobility of Ti. Diffusion of Ti into the zirconia structure promoted formation of tetragonal structures with p42/nmc-type space groups. The results indicate that the reduction of oxygen partial pressure during sintering and application of Sc-containing electrolyte material are successful strategies to hinder or even avoid reactivity.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Institute of Materials and Process Engineering (IMPE)
Publication type: Article in scientific Journal
DOI : 10.1016/j.ijhydene.2012.09.022
ISSN: 0360-3199
URI: https://digitalcollection.zhaw.ch/handle/11475/2190
Appears in Collections:Publikationen School of Engineering

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