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Inorganic and nuclear chemistry

Publication Details

Preparation of highly-oriented (Pb,Ba)TiO3 thin films by a sol-gel process,
Stacey W. Boland, Suresh C. Pillai, Wein-Duo Yang, and Sossina M. Haile, Journal of Materials Research 19, 2004, 1492-1498


Solid solution Pb1-xBaxTiO3, with particular emphasis on Pb0.5Ba0.5TiO3, was prepared
using a sol-gel process incorporating lead acetate trihydrate, barium acetate, and
titanium isopropoxide as precursors, acetylacetone (2,4 pentanedione) as a chelating
agent, and ethylene glycol as a solvent. The synthesis procedure was optimized by
systematically varying acetylacetone: Ti and H2O:Ti molar ratios and calcination
temperature. The resulting effects on sol and powder properties were studied using
thermogravimetric analysis/differential scanning calorimetry, Fourier transform infrared
spectroscopy, Brunauer-Emmett-Teller analysis, and x-ray diffraction (XRD).
Crystallization of the perovskite structure occurred at a temperature as low as 450 °C.
Thin films were prepared by spin coating on (100) MgO. Pyrolysis temperature and
heating rate were varied, and the resultant film properties investigated using
field-emission scanning electron microscopy, atomic force microscopy, and XRD.
Under optimized conditions, highly oriented films were obtained at a crystallization
temperature of 600 °C.