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Kinetics of the formation of PLZT: An in-situ XRD study

Roberts, MA; Sankar, G; Catlow, CRA; Thomas, JM; Greaves, GN; Jones, RH; (1996) Kinetics of the formation of PLZT: An in-situ XRD study. In: Cernik, RJ and Delhez, R and Mittemeijer, EJ, (eds.) EUROPEAN POWDER DIFFRACTION: EPDIC IV, PTS 1 AND 2. (pp. 417 - 421). TRANSTEC PUBLICATIONS LTD

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Abstract

Quantitative kinetics for the crystallisation of Pb1-xLax(Zr0.65Ti0.35)(1-x/4)O-3 (x=0.08 and 0.04) from alkoxide sol-gels have been studied in-situ by Energy Dispersive X-ray Diffraction (EDXRD) at temperatures in the range 550-625 degrees C. The material shows a three stage evolution, with an amorphous precursor of a pyrochlore/fluorite intermediate to the final cubic perovskite. The crystallisation kinetics were monitored by observing the changes in the integrated intensity of the (111)(c) perovskite reflection with time. The results suggest that the activation energy for crystallisation decreases as the concentration of La increases with activation energies of 190.5 and 301.1 KJ/mol for La of x=0.08 and 0.04, respectively.

Type:Proceedings paper
Title:Kinetics of the formation of PLZT: An in-situ XRD study
Event:4th European Powder Diffraction Conference (EPDIC IV)
Location:CHESTER, ENGLAND
Dates:1995-07
ISBN:0-87849-742-0
Keywords:PLTZ, Energy Dispersive X-ray Diffraction, kinetics, activation energy
UCL classification:UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry

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