Abstract
The oxygen diffusion coefficients in various liquid oxide melts have been measured from the EMF meas-urement on oxygen concentration cells with solid or liquid electrolytes. This method can determine the diffusion coefficient without the solubility data of oxygen in liquid.The liquid solutions, without transition metal oxides, having compositions of Na2-GeO2, PbO-SiO2, PbO-GeO2, and CaO-SiO2-Al2O3, were studied at 1000 to 1450°C. The liquid solutions, with transition metal oxide, having compositions of FeO -PbO-SiO2 and V2O5-PbO were studied at 800 to 1300°C.It was discussed that the diffusion rate of oxygen in a liquid oxide system without a transition metal was determined by the diffusion rate of diatomic oxygen dissolved in the liquid oxides, and that the diffusion mechanism of oxygen in a liquid oxide system with a transition metal oxide could be explained by the quasi -lattice defects model.
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