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Pentadionate: An Alternate Sol-Gel Method for the Synthesis of Ferroelectric Ba1−xSrxTiO3

Published online by Cambridge University Press:  10 February 2011

Pramod K. Sharma ,
K. A. Jose ,
V. V. Varadan  and
V. K. Varadan
Pramod K. Sharma
Affiliation:
Center for the Engineering of Electronics and Acoustic Materials, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
K. A. Jose
Affiliation:
Center for the Engineering of Electronics and Acoustic Materials, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
V. V. Varadan
Affiliation:
Center for the Engineering of Electronics and Acoustic Materials, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
V. K. Varadan
Affiliation:
Center for the Engineering of Electronics and Acoustic Materials, Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA
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Abstract

Sol-gel synthesis of transitional metal oxides is one of the important technique to obtain the pure and homogenous materials at low temperature. In this work, Barium strontium titantate (BST) was synthesized by sol-gel processing using 2,4-pentadionate as the precursors of metal oxides. The Ba1−xSrxTiO3 was prepared for four values of x i.e. 0.2, 0.4, 0.5 and 0.6. The obtained powders were heated from 400 °C to 800 °C at the interval of 100 °C to determine the temperature of crystallization. The phase of the final products was investigated by x-ray diffraction (XRD). Two particle sizes (< 100 nm and 200-400 nm) were observed under the scanning electron microscope (SEM) of the heat treated xerogel. The dielectric properties were determined by impedance analyzer at the frequency of 1MHz and explained in detail for the different values of x.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 606: Symposium NN – Chemical Processing of Dielectrics, Insulators & Electronic Ceramics , 1999 , 217
Copyright
Copyright © Materials Research Society 2000

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