Browsing by Subject "model Butlera"

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Determination of the surface tension for binary ionic solutions by means of Butler model
(2005) Iwanciw, Jerzy; Kalicka, Zofia Bronisława; Kawecka-Cebula, Elżbieta; Pytel, Krzysztof
It was attempted in this work to study the applicability of Butler approach to the metal oxide solutions. First of all, the authors tried to determine the impact of the thermodynamic activity coeffi-cients of the components of the bulk phase on the surface tension. The activity coefficients series expansions reported by Ban-ya and one of the authors of this work were used. The model eąuations were solved by means of a Newton regression method, which allowed to calculate the components contents in the surface phase. Those contents were subseąuently substituted into the modified Butler master eąuation, which gave desired finał surface tensions estimates for the considered oxide binaries. The computations were done for liquidMnO-SiO2 system (at 1843 K and 1990 K) and subseąuently for MnO-Al2O3 (at 2058 K) and MnO-CaO (at 2473 K) systems. For MnO-SiO2 system at 1843 K, theobtained results could be compared to the experimental ones and a fairly good agreement was found. For MnO-Al2O3 and MnO-CaO systems, unfortunately, there is no experimentally measured surface tension data, therefore it was not possible to make any comparison. Nevertheless, the model may be ąuite useful for the surface tension estimates for the systems, which have not been yet investigated and such model calculations like presented in this work may provide acceptable predictions.