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Preparation of (Pb,Ba)TiO3 powders and highly oriented thin films by a sol-gel process

Published online by Cambridge University Press:  03 March 2011

Stacey W. Boland ,
Suresh C. Pillai ,
Wein-Duo Yang  and
Sossina M. Haile
Stacey W. Boland
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
Suresh C. Pillai
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
Wein-Duo Yang
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
Sossina M. Haile*
Affiliation:
Department of Materials Science, California Institute of Technology, Pasadena, California 91125
*
a)Address all correspondence to this author.e-mail: [email protected]
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Abstract

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.

Keywords

FerroelectricSol-gelThin film
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 5 , May 2004 , pp. 1492 - 1498
Copyright
Copyright © Materials Research Society 2004

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