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Vol.7, No.2, 124 ~ 132, 1969
Title
Thermodynamic consideration of a Solution Region of the Fe - Zn Binary System based on Knoum Zinc Vapor Pressures at 700°to 900℃
김상주 Sang Joo Kim
Abstract
Thermodynamic properties of zinc and iron were derived from zinc-vapor pressures in equilibrium with B.C.C. Solutions of zinc and iron at 703.5˚, 757˚,793˚, and 900℃ measured by Wriedt using an isopiestic method. Gibbs free energy change difference of liquid zinc and weight pct in iron was computed by the both as standard states of pure B.C.C. elements and pure liquid zinc. The difference of computed values by both standard states shows quite small. It was determined that. an equation for the Gibbs free energy change between liquid zinc and weight pct in iron. Activities of iron for each temperature were derived with Gibbs-Duhem integrations by a graphical method using log r and were compared with values obtained by Wriedt using Gibbs-Duhem integrations of the form involving the α function. It was found that both values show a firely good coincidence.
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