How is oxygen incorporated into oxides? A comprehensive kinetic study of a simple solid-state reaction with SrTiO3 as a model material.
The kinetics of stoichiometry change of an oxide--a prototype of a simple solid-state reaction and a process of substantial technological relevance--is studied and analyzed in great detail. Oxygen incorporation into strontium titanate was chosen as a model process. The complete reaction can be phenomenologically and mechanistically understood beginning with the surface reaction and ending with the transport in the perovskite. Key elements are a detailed knowledge of the defect chemistry of the perovskite as well as the application of a variety of experimental and theoretical tools, many of them evolving from this study. The importance of the reaction and transport steps for (electro)chemical applications is emphasized.
Merkle
Rotraut
R
Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany.
Maier
Joachim
J
D003460:Crystallization; D004058:Diffusion; D004553:Electric Conductivity; D007700:Kinetics; D008956:Models, Chemical; D010087:Oxides / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D044367:Phase Transition; D013324:Strontium / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014867:Water / Q000737:chemistry
D010087:Oxides; D014867:Water; D014025:Titanium; C119252:strontium titanium oxide; D010100:Oxygen; D013324:Strontium