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Titanium Dioxide (TiO,) films by anodic oxidation in phosphoric acid

Abdullah, Hasan Zuhudi and Sorrell, C.C. (2012) Titanium Dioxide (TiO,) films by anodic oxidation in phosphoric acid. Advanced Materials Research, 545. pp. 223-228. ISSN 1022-6680


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Anodic oxidation is an electrochemical method for the production of an oxide film on a metallic substrate. It involves the application of an electrical bias at relatively low currents while the substrate is immersed in an acid bath. The films can be very dense and stable, with a variety of microstructural characteristics. In the present work, flms of the anatase polymorph of Ti02 were formed on high-purity Ti foil (50 pm thickness) using phosphoric acid (0.3 A4 H3P04). Thc conktions of oxidation involved the application of potentials (5 to 350 V) and current densities (5 to 60 m~.cm") for 10 m& at room temperature. The films were characterised using a digital photography, laser Raman microspectroscopy, and field emission scanning electron microscopy. The thicknesses of the oxide films on Ti were measured using a thin film analyser based on optical spectroscopy principles. The colours, thicknesses, and microstructures of the films depended strongly on the applied voltage and current density. At bias more than 15 V, single-phase anatase was observed to form on Ti at low (5 m ~ . c m -a~nd) h igher (up to 60 m~.cm-')c urrent density.

Item Type: Article
Uncontrolled Keywords: titania; anodic oxidation; raman spectroscopy; color
Subjects: T Technology > TS Manufactures > TS200-770 Metal manufactures. Metalworking
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Normajihan Abd. Rahman
Date Deposited: 16 Aug 2013 01:45
Last Modified: 21 Jan 2015 08:31
URI: http://eprints.uthm.edu.my/id/eprint/3880
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