均質な多元系溶体の任意の濃度における溶質元素間の相互作用

概要

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The general relationship between activities and activity coefficients based on Raoultian and Henrian reference states at any given concentration was derived and the relationship among concentration quotients of solute activity at constant concentration and at constant concentration ratio was also derived. WAGNER type theoretical series expansion is valid at any concentrated solution, and Taylor series expansion using the interaction parameters at constant concentration ratio is also possible. The conversion equations between several kinds of interaction parameters valid at any given concentration in a multicomponent solution were derived by the aid of Gibbs-Duhem equation and Maxwell cross differentials. In a ternary system 1-2-3, the following relations were obtained at any given concentration : [numerical formula] where γ (or f) is the activity coefficient in mole fraction basis (or in weight percent basis), N (or X) is the mole fraction (or weight percent), M is the atomic weight and the underscript signifies the component to be kept constant. It was also shown that the interaction parameter at constant mole fraction ratio β^<(j)>_i=β^<(i)>_j is valid at the condition N_i=N_j, and from this it follows that ∂lnγ_1/∂N_2=∂lnγ_2/∂N_1 at N_1=N_2=0.5 in a binary solution. A discussion was made concerning the solution ironnickel as an example.
社団法人日本鉄鋼協会の論文
1966-06-01