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Title: Preparation and characterisation of TiO2 thick films fabricated by anodic oxidation in sulphuric acid
Authors: H. Z., Abdullah
C. C., Sorrell
???metadata.dc.contributor.url???: hasan@uthm.edu.my
Keywords: Anodic oxidation;TiO2;Oxide films;Films;International Conference on X-Rays & Related Techniques in Research & Industry (ICXRI)
Issue Date: 9-Jun-2010
Publisher: Universiti Malaysia Perlis
???metadata.dc.publisher.department???: School of Materials Engineering & School of Environmental Engineering
Citation: p.217-222
Series/Report no.: Proceedings of the International Conference on X-Rays & Related Techniques in Research & Industry (ICXRI) 2010
Abstract: Anodic oxidation is an electrochemical method for the production of oxide films on metallic substrates. It involves the application of an electrical bias at relatively low currents while the substrate is immersed in an acid bath. The resultant oxide films can be very dense and stable, showing a variety of colours and microstructural characteristics. In the present work, thick films of the anatase and rutile polymorphs of TiO2 were formed on highpurity Ti foil (50 m thickness) using sulphuric acid solutions (1.5 M H2SO4). The conditions of oxidation involved the application of potentials (5 to 350 V) and current densities (5 to 60 mA.cm-2) for 10 min at room temperature. The films were characterised using a digital photography, laser Raman microspectroscopy, and field emission scanning electron microscopy (FESEM). The thicknesses of the oxide films on Ti were measured using a thin film analyser based on optical spectroscopy principles. The phase formation, colours, thicknesses, and microstructures of the films depended strongly on the applied voltage and current density. At a standard bias of 150 V, single-phase anatase was observed to form on Ti at low current density (5 mA.cm- 2) but, at higher current densities (up to 60 mA.cm-2), increasing rutile formation was observed.
Description: International Conference on X-Rays and Related Techniques in Research and Industry (ICXRI 2010) jointly organized by Universiti Malaysia Perlis (UniMAP) and X-Ray Application Malaysia Society (XAPP), 9th - 10th June 2010 at Aseania Resort Langkawi, Malaysia.
URI: http://hdl.handle.net/123456789/10192
ISBN: 978-967-5760-02-0
Appears in Collections:Conference Papers

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