Netsu Sokutei

A series of thermodynamic properties for binary mixtures {dioxane isomer+non-polarliquid} have been investigated to clarify the correlation of thermodynamic properties with solution structures of the component molecules.
In this report, we measured densities of binary mixtures (dioxane isomer+2, 2, 4-trimethylpentane, or tetrachloroethene, or benzene) at 293.15, 298.15 and 303.15K, and calculated excess volumes and excess thermalexpansion coefficients of these mixtures from the experimental results. 1, 4-dioxane mixtures have the similar volume effects to 1, 3-dioxane mixtures, despite that 1, 4-dioxane is non-polar solvent and 1, 3-dioxane is the Bipolar liquid.
The similar discussion has been made from the thermal effects in these mixtures in the previous paper.

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The method to analyze and control the interface reactions which involve multi-component reactions and diffusions has been described. Chemical potential diagrams have been used to analyze the interface reactions. The chemical potential diagrams are constructed using the data of Gibbs energy of formation of the compounds involved in the interface reactions. The reaction paths and the diffusion behavior of the interface reactions have been reasonably explained by a simple model assuming a local equilibrium at the interfaces, which predicts that the reaction path should be represented by lines in the chemical potential diagrams. Various examples of the interface reactions of FeO/Cr, Cu₂O/Ni, TiAl/Al₂O₃, TiAl/TiO₂ and Ti/Al₂O₃, and the oxidation reactions of TiAl and a stainless steel have been presented and analyzed using the model. The method to predict and control the interface reactions using the chemical potential diagrams is also presented.

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