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Crystallization Kinetics of Sol-gel-derived (1x)SrBi2Ta2O9–xBi3TiTaO9 Ferroelectric Thin Films

Published online by Cambridge University Press:  31 January 2011

Woo-Chul Kwak  and
Yun-Mo Sung
Woo-Chul Kwak
Affiliation:
Functional Nanostructured Materials Laboratory (FNML), Department of Materials Science –711, Korea
Yun-Mo Sung*
Affiliation:
Functional Nanostructured Materials Laboratory (FNML), Department of Materials Science –711, Korea
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

The crystallization kinetics of Sr0.7Bi2.3Ta2O9 (SBT) and 0.7SrBi2Ta2O9–0.3Bi3TiTaO9 (SBT-BTT) thin films formed by the sol-gel and spin coating techniques were studied. Phase formation and crystal growth are greatly affected by the film composition and crystallization temperature. Isothermal kinetic analysis was performed on the x-ray diffraction results of the thin films heated in the range of 730 to 760 °C at 10 °C intervals. Activation energy and Avrami exponent values were determined for the fluorite-to-Aurivillus phase transformation. A reduction of approximately 51 kJ/mol in activation energy was observed for the SBT-BTT thin films, and an Avrami exponent value of approximately 1.0 was obtained for both the SBT and SBT-BTT. A comparison is made, and the possible crystallization mechanism is discussed.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 6 , June 2002 , pp. 1463 - 1468
Copyright
Copyright © Materials Research Society 2002

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