Abstract
An electromotive force cell employing the ZrO2-CaO solid electrolyte has been set up to investigate the kinetics of dissolution of oxygen in molten lead under various oxidizing conditions. The cell may be written as Open image in new window The cell has been so designed that the electrode chambers are completely isolated from each other. The oxygen in lead is first reduced to a very low value by bubbling hydrogen. subsequently, oxygen dissolution is achieved through gas diffusion across the free surface or through bubble metal interaction. During all these reactions the electromotive force of the cell changes continuously and is automatically recorded. The diffusion coefficient of oxygen in lead, as calculated from the experimental data, is 1.29×10−5 sq cm per sec and the liquid phase mass transfer coefficient is estimated to be 0.035 cm per sec at 750°C.
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