Boland, Stacey W. and Pillai, Suresh C. and Yang, Wein-Duo and Haile, Sossina M. (2004) Preparation of (Pb,Ba)TiO3 powders and highly oriented thin films by a sol-gel process. Journal of Materials Research, 19 (5). pp. 1492-1498. ISSN 0884-2914 http://resolver.caltech.edu/CaltechAUTHORS:BOLjmr04
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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.
|Additional Information:||© 2004 Materials Research Society (Received 17 September 2003; accepted 9 February 2004) The authors gratefully acknowledge Dr. Chi Ma for his assistance with electron microscopy and Justin S. Boland for his help with atomic force microscopy. This work has been funded by a United States Department of Defense MURI award administered by the Army Research Office. Additional support has been provided by the National Science Foundation, through the Caltech Center for the Science and Engineering of Materials.|
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|Deposited On:||06 Sep 2006|
|Last Modified:||26 Dec 2012 09:01|
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