Microstructure and ionic conductivity of alternating-multilayer structured Gd-doped ceria and zirconia thin films

Multilayer thin film of Gd-doped ceria and zirconia have been grown by sputter-deposition on α-Al 2 O 3 (0001) substrates. The films were characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Th...

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Bibliographic Details
Published in:Journal of materials science 2009-04, Vol.44 (8), p.2021-2026
Main Authors: Wang, Yiguang, An, Linan, Saraf, L. V., Wang, C. M., Shutthanandan, V., McCready, D. E., Thevuthasan, S.
Format: Article
Language:English
Subjects:
Aluminum oxide
Atomic force microscopy
CERIUM OXIDES
Characterization and Evaluation of Materials
Classical Mechanics
Crystallography and Scattering Methods
DOPED MATERIALS
Electrons
Environmental Molecular Sciences Laboratory
Fluorite
GADOLINIUM
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
Ion currents
IONIC CONDUCTIVITY
Ions
Materials Science
Microscopy
MICROSTRUCTURE
Multilayer thin films, ZrO2, CeO2, Sputter deposition, Ionic conductivity
Multilayers
Photoelectrons
Polymer Sciences
Solid Mechanics
Spectrum analysis
Substrates
THIN FILMS
Transmission electron microscopy
X ray photoelectron spectroscopy
Zirconium dioxide
ZIRCONIUM OXIDES
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Summary:Multilayer thin film of Gd-doped ceria and zirconia have been grown by sputter-deposition on α-Al 2 O 3 (0001) substrates. The films were characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The Gd-doped ceria and zirconia layers had the fluorite structure and are highly textured such that the (111) plane of the films parallel to the (0001) plane of the α-Al 2 O 3 . The epitaxial relationship can be written as and , respectively. The absence of Ce 3+ features in the XPS spectra indicates that the Gd-doped ceria films are completely oxidized. The ionic conductivity of this structure shows great improvement as compared with that of the bulk crystalline material. This research provides insight on designing of material for low temperature electrolyte applications.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-009-3269-2