Kinetics of PbTiO3 perovskite phase formation via an interfacial reaction

Yun Mo Sung, Woo Chul Kwak, Sungtae Kim

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9 Citations (Scopus)

Abstract

The kinetics of the formation of PbTiO3 at the PbO/TiO2 interface has been analyzed. The flux of Pb2+ and O2- ions through the PbTiO3 layer was used to derive the kinetics equation for the formation of the PbTiO3 phase. On the basis of the parabolic growth kinetics of the PbTiO3 interlayer, the reaction rate constant (k) for PbTiO3 formation was determined as a function of the average diffusion coefficient of the Pb2+ ions (D̄Pb2+). By employment of the data from diffusion couple experiments and the free energy values for the formation of the PbTiO3 phase (ΔGPBTiO(3)°) into the present kinetics equation, D̄Pb2+ in the PbTiO3 interlayer was calculated with respect to the corresponding temperature. The activation energy for diffusion (Q) and the diffusion constant (D0) of Pb2+ ions in the PbTiO3 layer could be evaluated from the Arrhenius plot of D̄Pb2+.

Original languageEnglish
Pages (from-to)407-412
Number of pages6
JournalJournal of Materials Research
Volume17
Issue number2
DOIs
Publication statusPublished - 2002 Feb
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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