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Sol-gel processing of titanium-containing thin coatings

Part I Preparation and structure

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Abstract

Using tetrabutylorthotitanate as a precursor, titanate coatings with and without modifiers such as SnO2 and Fe2O3 have been successfully obtained. The hydrolysis and polycondensation mechanism is discussed in relation to the sol-gel transition. The gel-formation region was obtained as well as stable-layer formation and phase-separation regions in the Ti(OBun)4-C2H5OH-H2O system. Coatings deposited on glass substrates exhibited a strong tendency to aggregate and with increasing temperature to crystallize in anatase or rutile phases (500 and 1000 °C, respectively). Structural characteristics of the gel products were investigated by SEM, X-ray and electron diffraction measurements, as well as by small-angle X-ray scattering. It was established that after thermal treatment at 500 °C for 10 min, spherical aggregates were formed in the coatings, having an average radius of approximately 5.1 nm.

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Authors and Affiliations

  1. Sofia University of Technology, 1756, Sofia, Bulgaria

    B. Samuneva, V. Kozhukharov & Ch. Trapalis

  2. Wilhelm-Pieck Universität - Rostock, Rostock, Germany

    R. Kranold

Authors
  1. B. Samuneva
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  2. V. Kozhukharov
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  3. Ch. Trapalis
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  4. R. Kranold
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Samuneva, B., Kozhukharov, V., Trapalis, C. et al. Sol-gel processing of titanium-containing thin coatings. J Mater Sci 28, 2353–2360 (1993). https://doi.org/10.1007/BF01151665

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  • DOI: https://doi.org/10.1007/BF01151665

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