Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Abstract
The exchange ratio and the exchange rate of oxygen between the gas and liquid phases were measured in molten silicate systems PbO-SiO_2 and CaO-SiO_2 using ^<18>O as the tracer. It was clarified that not all of the oxygen in the system PbO-SiO_2 took part in the exchange. In contrast, in the system CaO-SiO_2 all of the oxygen contributed to the exchange. Self-diffusion coefficients of oxygen were determined using the exchange rates for the two systems. The results were compared with the self-diffusion coefficients of silicon for the respective systems. On the basis of the results, the self-diffusion mechanism of oxygen was discussed
