Thermodynamische Untersuchungen im System NiOCoO mittels galvanischer Festkörperketten

A method is described to determine thermochemical data for systems of mixed oxides characterized by the fact that the Gibbs free energy of formation of the component oxides is similar in magnitude. The method is based upon the measurement of the electromotive force of an appropriate galvanic cell and has been successfully verified for the system NiOCoO. In this study a cell of the type PtMe, MeOZrO2 (+CaO)Me, MeOssPt has been employed. For the system investigated, i.e., NiOCoO, a small positive deviation from Raoult's law was found at 1000 K, whereas at 1300 K an almost ideal behavior was met.