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TitleStructural characterisation of heat-treated anodic alumina membranes prepared using a simplified fabrication process
Publication TypeJournal Article
Year of Publication2007
AuthorsKirchner, A., Mackenzie K.J.D., Brown I.W.M., Kemmitt T., and Bowden M.E.
JournalJournal of Membrane Science
Pagination264 - 270
Date Published2007
ISSN03767388 (ISSN)
KeywordsAlumina, aluminum oxide, Amorphous materials, article, catalysis, ceramics, Crystallization, gas, heat, Heat treatment, high temperature, Iodine, Mass spectrometry, Materials synthesis, membrane, membrane stabilization, Membranes, methanol, nuclear magnetic resonance, Oxide membrane preparation, Porous anodic alumina, priority journal, solid state, synthesis, thermal analysis, Thermoanalysis, Thermodynamics, X ray diffraction, X ray diffraction analysis
AbstractA facile method for forming porous anodic alumina membranes based on one-step anodising in sulphuric acid is reported. A flat and well-ordered basal surface incorporating uniformly sized pores was obtained without the need for electrolytic polishing. Excess metallic aluminium was removed from the film using a saturated solution of iodine in methanol. The high-temperature properties of the oxide ceramic membranes were investigated using thermal analysis, mass spectrometry, X-ray diffraction and solid-state nuclear magnetic resonance. At 970 °C the amorphous alumina crystallises to γ-Al2O3 with the release of SO2 and O2. Finally at 1228 °C the alumina converts into the thermodynamically preferred phase, corundum. The pore structure of the oxide membrane was found to be very stable at elevated temperatures, suggesting applications in materials synthesis, catalysis and gas separation. © 2006 Elsevier B.V. All rights reserved.

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