Crystallization kinetics of seeded SBT (Sr 0.7Bi 2.4Ta 2O 9) powders from sol-gel derived precursors

Gopinathan M A Kumar, Woo Chul Kwak, Se Yon Jung, Seung Joon Hwang, Yun Mo Sung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Strontium bismuth tantalate (SBT) having composition of Sr 0.7Bi 2.4Ta 2O 9 has been prepared through sol-gel method using their corresponding metal alkoxides as precursors. Seeded SBT powder was prepared by the addition of 5 wt.% of nanometer sized SBT particles to the sol followed by pyrolysis. By applying non-isothermal kinetic analysis to the DTA results, activation energy values for the unseeded and seeded samples were determined. Enhanced crystallization kinetics was observed for the seeded one and the activation energy for the aurivillius phase formation was found to be 318 kJ/mol, while 375 kJ/mol for the unseeded. The Avrami exponent values for the seeded and unseeded were found to be 2.80 and 0.96 respectively.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium - Proceedings
Pages89-94
Number of pages6
Volume688
Publication statusPublished - 2002
Externally publishedYes
EventFerroelectric Thin Films X - Boston, MA, United States
Duration: 2001 Nov 252001 Nov 29

Other

OtherFerroelectric Thin Films X
CountryUnited States
CityBoston, MA
Period01/11/2501/11/29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

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  • Cite this

    Kumar, G. M. A., Kwak, W. C., Jung, S. Y., Hwang, S. J., & Sung, Y. M. (2002). Crystallization kinetics of seeded SBT (Sr 0.7Bi 2.4Ta 2O 9) powders from sol-gel derived precursors In Materials Research Society Symposium - Proceedings (Vol. 688, pp. 89-94)