表面張力の熱力学的考察

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  • Thermodynamics of Surface Tension. (Fundamental Studies on Cermet, Part 8)
  • ヒョウメン チョウリョク ノ ネツリキガクテキ コウサツ

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This paper proposes a formula to calculate thermodynamically the surface tension of binary liquid system which forms imperfect solution. According to the author’s experimental results, it is natural to assume that (1) the molecules on the surface are packed at the same mole volume as in the bulk, and (2) the difference of the surface composition from that of the bulk is confined to a single moleculer layer of surface. Then the Bulter’s equation (ψiσ−ψi=γai) can be applied to metallic solution. Furthermore, the following equations can be deduced. (1) In a substitutional type binary system,<BR>(This article is not displayable. Please see full text pdf.) <BR>(2) In a interstitial type binary system,<BR>(This article is not displayable. Please see full text pdf.) <BR>Equation (1) is similar to Hoar and Melford’s equation, but the Value of 1″ is to be chosen to suit the type of chemical bonding of the liquid, namely 0.5 for van der Waals liquid, 0.82 for metallic liquid and 0.90 for ionic liquid. The interfacial tension is also discussed.

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