Title: Properties of flame sprayed Ce0.8Gd0.2O1.9-δ electrolyte thin films
Authors : Karageorgakis, Nikolaos I.
Heel, Andre
Rupp, Jennifer L. M.
Aguirre, Myriam H.
Graule, Thomas
Gauckler, Ludwig J.
Published in : Advanced functional materials
Volume(Issue) : 201
Issue : 3
Pages : 532
Pages to: 539
Publisher / Ed. Institution : Wiley
Issue Date: 2011
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 660: Chemical engineering
Abstract: Thin films of Ce0.8Gd0.2O1.9-δ (CGO) are deposited by flame spray deposition with a deposition rate of about 30 nm min−1. The films (deposited at 200 °C) are dense, smooth, and particle-free and show a biphasic amorphous/nanocrystalline microstructure. Isothermal grain growth and microstrain are determined as a function of dwell time and temperature and correlated to the electrical conductivity. CGO films annealed for 10 h at 600 °C present the best electrical conductivity of 0.46 S m−1 measured at 550 °C. Reasons for the superior performance of films annealed at low temperature over higher-temperature-treated samples are discussed and include grain-size evolution, microstrain relaxation, and chemical decomposition. Nanoindentation measurements are conducted on the CGO thin films as a function of annealing temperature to determine the hardness and elastic modulus of the films for potential application as free-standing electrolyte membranes in low-temperature micro-SOFCs (solid oxide fuel cells).
Departement: School of Engineering
Organisational Unit: Institute of Materials and Process Engineering (IMPE)
Publication type: Article in scientific Journal
DOI : 10.1002/adfm.201001622
ISSN: 1616-301X
URI: https://digitalcollection.zhaw.ch/handle/11475/9277
Appears in Collections:Publikationen School of Engineering

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