TY - JOUR
T1 - Chemical diffusion of (La,Sr)CoO3 and (La,Sr)FeO3
AU - Rekas, M.
AU - Bak, T.
AU - Nowotny, Janusz
AU - Sorrell, C. C.
AU - Zhao, Y.
AU - Foger, K.
AU - Vance, E. R.
PY - 2000
Y1 - 2000
N2 - The present work reports equilibration kinetics for (La0.8,Sr0.2)CoO3(LSC) and (La0.72,Sr0.18)FeO3(LSF) in the temperature range 876-1114 K using a gravimetric method. Chemical diffusion determined in this way that depends on oxygen partial pressure, can be expressed by the following temperature dependence at low and high p(O2), respectively, for LSC: Dchem=8.7×10-3exp-(58.1±8.5)kJ/mol/RT (cm2s-1) (1) Dchem=6.2×10-3exp-(75.4±6.5)kJ/mol/RT (cm2s-1) (2) and for LSF: Dchem=3.05×10-5exp-(30.3±2.8)kJ/mol/RT (cm2s-1) (3) Dchem=6.3×10-3exp-(82.7±10.2)kJ/mol/RT (cm2s-1) (4)
AB - The present work reports equilibration kinetics for (La0.8,Sr0.2)CoO3(LSC) and (La0.72,Sr0.18)FeO3(LSF) in the temperature range 876-1114 K using a gravimetric method. Chemical diffusion determined in this way that depends on oxygen partial pressure, can be expressed by the following temperature dependence at low and high p(O2), respectively, for LSC: Dchem=8.7×10-3exp-(58.1±8.5)kJ/mol/RT (cm2s-1) (1) Dchem=6.2×10-3exp-(75.4±6.5)kJ/mol/RT (cm2s-1) (2) and for LSF: Dchem=3.05×10-5exp-(30.3±2.8)kJ/mol/RT (cm2s-1) (3) Dchem=6.3×10-3exp-(82.7±10.2)kJ/mol/RT (cm2s-1) (4)
UR - http://www.scopus.com/inward/record.url?scp=0042186765&partnerID=8YFLogxK
U2 - 10.1023/A:1008926809900
DO - 10.1023/A:1008926809900
M3 - Article
AN - SCOPUS:0042186765
SN - 0957-4522
VL - 11
SP - 691
EP - 696
JO - Journal of Materials Science: Materials in Electronics
JF - Journal of Materials Science: Materials in Electronics
IS - 9
ER -