Journal
THIN SOLID FILMS
Volume 518, Issue 6, Pages 1653-1657Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2009.11.078
Keywords
Cerium titanate; Brannerite; Sol-gel; Titania-ceria
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Funding
- Italian Ministero dell'Universit-A e della Ricerca (MiUR) through FIRB2003 [RBNE033KMA]
- Sardegna Ricerche through the project Nanoceria
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Thin films of titania-ceria have been prepared via sol-gel processing by employing titanium and cerium chloride compounds in highly acidic conditions for the precursor sol. This sol-gel route allows obtaining titania-ceria and cerium titanate films, CeTi2O6, after thermal treatment in air. The films exhibit a high optical transparency which is modulated by controlling the composition and the thermal treatment. The materials have been characterized by X-ray diffraction, UV-visible spectroscopy, ellipsometric spectroscopy and atomic force microscopy. The titania-ceria films show, as a function of the composition, the formation of different phases after thermal treatment in air at 800 degrees C. In particular, with the composition Ce25-Ti75 we have obtained a pure cerium titanate phase, CeTi2O6, which can be formed only in a very strict range of compositions. (C) 2009 Elsevier B.V. All rights reserved.
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