HIGH-TEMPERATURE THERMODYNAMICS AND OXYGEN PERMEABILITY OF PRBA2CU3O6+X

Authors
PATRAKEEV MV LEONIDOV IA KOZHEVNIKOV VL
Citation
Mv. Patrakeev et al., HIGH-TEMPERATURE THERMODYNAMICS AND OXYGEN PERMEABILITY OF PRBA2CU3O6+X, Solid state ionics, 82(1-2), 1995, pp. 5-13
Citations number
14
Categorie Soggetti
Physics, Condensed Matter","Chemistry Physical
Journal title
Solid state ionics → ACNP
ISSN journal
01672738
Volume
82
Issue
1-2
Year of publication
1995
Pages
5 - 13
Database
ISI
SICI code
0167-2738(1995)82:1-2<5:HTAOPO>2.0.ZU;2-9
Abstract
The pressure-composition isotherms for oxygen in PrBa2Cu3O6+x were mea sured by means of coulometric titration in the temperature range 550-8 25 degrees C and at oxygen pressures between 10(-3) and 1 atm. The com position dependences of thermodynamic potentials reveal substantially non-ideal behavior of the ensemble of the oxygen ions in the basal pla ne. The oxygen ion conductivity of the PrBa2Cu3O6+x compound was measu red by a permeation technique in the temperature range 600-850 degrees C and at oxygen pressures between 0.08 and 1.00 atm. The data were em ployed for calculation of the oxygen chemical diffusion coefficient. T he activation energy of the oxygen conductivity and oxygen diffusivity was found to depend linearly on the oxygen content, U = 2.46-1.57x (e V), in the integral 0.35 < x < 0.60 which was explained by interaction of movable oxygen ions.