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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemistry
Transition alumina phases induced by heat treatment of boehmite: An X-ray diffraction and infrared spectroscopy study
Journal of Solid State Chemistry, Volume 182, No. 5, Year 2009
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Description
During high temperature oxidation of alumina-forming alloys, various transition aluminas are formed before reaching the most stable α-Al2O3 phase. In particular, the γ, δ and θ transition aluminas are concerned. Precise studies on the development, the microstructure and the properties of the oxide layers are not straightforward owing to the difficulty to unambiguously distinguish the various polymorphs by X-ray diffraction (XRD) alone. To remove this difficulty, we propose a procedure which combines XRD and infrared (IR) spectroscopy. γ, δ, θ and α-Al2O3 phases, prepared by dehydration of aluminium oxihydroxide AlOOH (boehmite), were measured by XRD and IR spectroscopy on all samples. Thus, reference IR spectra were obtained for all alumina phases, as well as an assignment of the main band in agreement with previous studies, and coherent with the structural evolution of various polymorphs. This precise characterization may constitute a basis for further investigations on thin layers of alumina formed under various experimental conditions (temperature, atmosphere, etc.). © 2009 Elsevier Inc. All rights reserved.
Authors & Co-Authors
Boumaza, Abdecharif
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Algeria, Khenchela
Université Abbes Laghrour Khenchela
Favaro, L.
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Ledion, J.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Sattonnay, G.
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Brubach, J. B.
France, Gif-sur-yvette
Soleil Synchrotron
Berthet, Patrick
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Huntz, Anne Marie
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Roy, P.
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
France, Gif-sur-yvette
Soleil Synchrotron
Tétot, R.
France, Orsay
Institut de Chimie Moléculaire et Des Matériaux D'orsay
Statistics
Citations: 438
Authors: 9
Affiliations: 4
Identifiers
Doi:
10.1016/j.jssc.2009.02.006
ISSN:
00224596
e-ISSN:
1095726X