Thermodynamic and pseudo binary phase diagram of REBa2Cu3O7-x-'Ba2Cu5O 7' systems. The effect of oxygen pressure

M. Ferretti, E. Magnone

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work the effect of oxygen pressure on the primary crystallisation fields for REBa2Cu3O7-x (RE = Nd, Sm, and Eu) has been studied. A DTA apparatus has been modified in order to carry out analyses under gas pressure, so the trend of temperatures of peritectic decomposition of the REBa2Cu3O7-x phases and of the eutectic equilibrium involving REBa2Cu3O7-x phases and flux mixture 'Ba2Cu5O7' have been studied at oxygen pressures of 0.21, 1, and 10 atm. This showed that primary crystallisation fields spread at the increase of the oxygen pressure and allowed us to calculate the enthalpies of reactions of REBa2Cu3O7-x phases too.

Original languageEnglish
Pages (from-to)129-134
Number of pages6
JournalJournal of Thermal Analysis and Calorimetry
Volume70
Issue number1
DOIs
StatePublished - 2002

Keywords

  • High-T compounds
  • Phase diagrams
  • Thermodynamic properties

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