The Solubility of Ar in Liquid Succinonitrile.

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  • Wang Ying Hui
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University
  • Sasaki Yasushi
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University
  • Ishii Kuniyoshi
    Division of Materials Science and Engineering, Graduate School of Engineering, Hokkaido University

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Since a gas bubble formation process ahead of a growing dendritic solid/liquid interface is quite complex, the direct observation of gas bubble formation by using the transparent materials is very useful method to study. For works on the gas bubble formation during the solidification, the information of solubility of gas in the melt was required. The first attempt to measure the solubility of Ar in molten succinonitrile was carried out by using a newly developed method which consists of the injection of He into molten salts through a nozzle, collection of ascending bubbles of He–Ar gas mixture, determination of concentration of Ar in the He-Ar gas mixture using a high sensitive mass spectrometer. The solubilities of Ar in molten succinonitrile have been determined as a function of temperature from 333 to 348 K and were best expressed by<br><br>ln[Ar]=–7.64–1630/T<br><br>where the unit of solubility is expressed by mol-Ar/cm3-succinonitrile. From the temperature dependency of Ar solubility, the enthalpy of solution was found to be about 13.5 kJ/mol.

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