TY - JOUR
T1 - Chemical surface exchange of oxygen on Y2O 3-stabilized ZrO2
AU - Sasaki, K.
AU - Maier, J.
N1 - Funding Information:
We thank Dr. R.I. Merino for helpful suggestions and encouragement in the initial stage of this study, Dr. R. Merkle for helpful discussion, and M. Haseidl for experimental contributions. Technical support by the crystal preparation service group is gratefully acknowledged.
PY - 2003/7
Y1 - 2003/7
N2 - The chemical surface exchange of oxygen at single-crystalline Y 2O3-stabilized ZrO2 surfaces is studied using the in situ optical absorption relaxation technique. The surface exchange coefficients depend on temperature, oxygen partial pressure, and redox-active dopant concentration in a dilute concentration range; they depend only slightly on surface orientation, and become independent of annealing time after a long time treatment (typically at 800 °C). Using the thermodynamic factor of oxygen (which sensitively depends on redox-active impurities) derived from the known defect chemical parameters of this material, the effective macroscopic chemical rate constants are analyzed. The correlation with effective tracer rate coefficients is discussed for this model electron-poor ionic conductor.
AB - The chemical surface exchange of oxygen at single-crystalline Y 2O3-stabilized ZrO2 surfaces is studied using the in situ optical absorption relaxation technique. The surface exchange coefficients depend on temperature, oxygen partial pressure, and redox-active dopant concentration in a dilute concentration range; they depend only slightly on surface orientation, and become independent of annealing time after a long time treatment (typically at 800 °C). Using the thermodynamic factor of oxygen (which sensitively depends on redox-active impurities) derived from the known defect chemical parameters of this material, the effective macroscopic chemical rate constants are analyzed. The correlation with effective tracer rate coefficients is discussed for this model electron-poor ionic conductor.
UR - http://www.scopus.com/inward/record.url?scp=0042433114&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0042433114&partnerID=8YFLogxK
U2 - 10.1016/S0167-2738(03)00264-9
DO - 10.1016/S0167-2738(03)00264-9
M3 - Article
AN - SCOPUS:0042433114
SN - 0167-2738
VL - 161
SP - 145
EP - 154
JO - Solid State Ionics
JF - Solid State Ionics
IS - 1-2
ER -