CO2 decomposition kinetics of YBa2Cu3O7-x via in situ electrical conductivity measurements

E. A. Cooper, T. O. Mason, U. Balachandran

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7 Citations (Scopus)

Abstract

In situ electrical conductivity measurements were employed to study the kinetics of decomposition of YBa2Cu307_x in flowing 5% C02/95% 02 atmosphere at 815 °C. Three regimes could be observed in the decay of the conductivity with time, interpreted as corresponding to nucleation over the initial 5–10 min, rapid formation of Y2Cu205, BaC03, and CuO between 10 min and 1 h, and finally transition to the formation of Y2BaCu05, BaC03, and CuO at longer times. The absence of dispersion in impedance measurements as a function of frequency together with the gradual decay of conductivity (roughly corresponding to the remaining volume fraction of YBa2Cu307_x;) indicates that not all grain boundaries are involved in the decomposition process.

Original languageEnglish
Pages (from-to)1393-1397
Number of pages5
JournalJournal of Materials Research
Volume6
Issue number7
DOIs
Publication statusPublished - Jul 1991

ASJC Scopus subject areas

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

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