THERMOCHEMICAL CHARACTERISTICS OF NONSTOICHIOMETRIC BA2CU3O5 .2. THERMAL TRANSFORMATIONS

Authors
MAIOROVA AF MUDRETSOVA SN KOVBA ML MONAENKOVA AS POPOVA AA
Citation
Af. Maiorova et al., THERMOCHEMICAL CHARACTERISTICS OF NONSTOICHIOMETRIC BA2CU3O5 .2. THERMAL TRANSFORMATIONS, Physica. C, Superconductivity, 218(1-2), 1993, pp. 137-140
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
Physica. C, Superconductivity → ACNP
ISSN journal
09214534
Volume
218
Issue
1-2
Year of publication
1993
Pages
137 - 140
Database
ISI
SICI code
0921-4534(1993)218:1-2<137:TCONB.>2.0.ZU;2-1
Abstract
Thermoanalysis (TG-DSC) of the pure compound Ba2Cu3O5+delta (023) has been carried out at oxygen pressures of 0.21 and 1 atm in the temperat ure range 25-970-degrees-C. It was shown that 5.5 < delta (P(O2), T) < 5.8 and the compound (023) decomposed at 758-degrees-C (0.21 atm) and at 806-degrees-C (1 atm O2). At higher temperatures BaCuO2 and base s olid solutions with CuO and Cu2O (> 823-degrees-C at 0.21 atm 02; > 89 0-degrees-C at 1 atm O2) appeared. The liquid phase transition took pl ace at temperatures higher than 860-degrees-C (0.21 atm) and 910-degre es-C (1 atm).