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Preparation of Titanium Oxide and Metal Titanates as Powders, Thin Films, and Microspheres by Novel Inorganic Sol-Gel Process

Published online by Cambridge University Press:  01 February 2011

A. Deptuła ,
Kenneth C Goretta ,
Tadeusz Olczak ,
Wieslawa Lada ,
Andrzej G. Chmielewski ,
U. Jakubaszek ,
Bozena Sartowska ,
Carlo Alvani ,
Sergio Casadio  and
Vittoria Contini
A. Deptuła
Affiliation:
[email protected]
Kenneth C Goretta
Affiliation:
[email protected], Argonne National Laboratory, 9700 S. Cass Ave., Argonne, IL, 60439-4838, United States, 703 588 1785
Tadeusz Olczak
Affiliation:
[email protected]
Wieslawa Lada
Affiliation:
[email protected]
Andrzej G. Chmielewski
Affiliation:
[email protected]
U. Jakubaszek
Affiliation:
[email protected]
Bozena Sartowska
Affiliation:
[email protected]
Carlo Alvani
Affiliation:
[email protected].
Sergio Casadio
Affiliation:
[email protected].
Vittoria Contini
Affiliation:
[email protected]
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Abstract

Titanium oxide and titanates based on Ba, Sr and Ca were prepared from commercial solutions of TiCl4 and HNO3. The main preparation steps for the sols consisted of elimination of chloride anions by distillation with nitric acid and addition of metal hydroxides for the titanates. Resulting sols were gelled and used to (1) prepare irregularly shaped powders by evaporation; (2) produce by a dipping technique thin films on glass, Ag, or Ti substrates; and (3) produce spherical powders (diameters <100 μm) by solvent extraction. Results of thermal and X-ray-diffraction analyses indicated that the temperatures required to form the various compounds were lower than those necessary to form the compounds by conventional solid-state reactions and comparable to those required with use of organometallic based sol-gel methods. Temperatures of formation could be further reduced by addition of ascorbic acid to the sols.

Keywords

sol-gelTiphase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 900: Symposium O – Nanoparticles and Nanostructures in Sensors and Catalysis , 2005 , 0900-O09-10
Copyright
Copyright © Materials Research Society 2006

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References

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