Mechanism of oxygen ion transfer in oxide melts based on V2O5

Resumo

A model of oxygen ion transport in molten V2O5 is proposed. Within the framework of this model, the values of the parabolic rate constant of the catastrophic oxidation of copper in contact with V₂O₅ and oxygen flux through an ion transport membrane with liquid-channel grain-boundary structure on the basis of V₂O₅ are calculated as k′′ = 2.4 × 10^–5 kg²/(m⁴ s) and J = 2.7 × 10^–4 mol/(m² s) at 700°C. These values are in agreement with the experimental data in order of magnitude, indicating the agreement between theory and experiment.