CONTRATADOS
CANEIRO Alberto
artículos
Título:
Oxygen equilibrium and kinetics in PrBaCo2O5+δ
Autor/es:
C. FRONTERA; A. CANEIRO; A.E. CARRILLO; J. ORÓ SOLÉ; J.L. GARCÍA MUÑOZ
Revista:
BOLETíN DE LA SOCIEDAD ESPAñOLA DE CERáMICA Y VIDRIO
Editorial:
SOC ESPANOLA CERAMICA VIDRIO
Referencias:
Año: 2006 vol. 45 p. 139 - 139
ISSN:
0366-3175
Resumen:
By means of in-situ thermo-gravimetry analysis (TGA) we have studied the dependence on temperature of the equilibriumoxygen content (δ) in PrBaCo2O5+δ cobaltite under different atmospheres or oxygen partial pressure. We have also characterizedthe kinetics of δ changes at different temperatures. The equilibrium studies have permitted us to prepare samples with thedesired values of δ, a crucial step to correctly characterize the interesting family of layered ?112? cobalt oxides. Kinetic studiesreveal that oxygen diffusion and surface reactivity starts at low temperatures (200oC) in these compounds.