Citation
M. Rekas et al., Chemical diffusion of (La,Sr)CoO3 and (La,Sr)FeO3, J MAT S-M E, 11(9), 2000, pp. 691-696
Citations number
25
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
ISSN journal
09574522
→ ACNP
Volume
11
Issue
9
Year of publication
2000
Pages
691 - 696
Database
ISI
SICI code
0957-4522(200012)11:9<691:CDO(A(>2.0.ZU;2-0
Abstract
The present work reports equilibration kinetics for (La-0.8,Sr-0.2)CoO3(LSC
) and (La-0.72,Sr-0.18)FeO3(LSF) in the temperature range 876-1114 K using
a gravimetric method. Chemical diffusion determined in this way that depend
s on oxygen partial pressure, can be expressed by the following temperature
dependence at low and high p(O-2), respectively, for LSC:
D-chem=8.7 x 10(-3) exp-(58.1 +/- 8.5)kJ/mol/RT (cm(2)s(-1))(1)
D (chem)=6.2 x 10(-3) exp-(75.4 +/- 6.5)kJ/mol/RT (cm(2)s(-1)) (2)
and for LSF:
D (chem)=3.05 x 10(-5) exp-(30.3 +/- 2.8)kJ/mol/RT (cm(2)s(-1)) (3)
D-chem=6.3 x 10(-3) exp-(82.7 +/- 10.2)kJ/mol/RT (cm(2)s(1)) (4)
(C) 2000 Kluwer Academic Publishers.