気-液共存系の不均一核生成による相変化における過冷却度の評価

概要

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The critical temperature and critical vapor pressure in the phase change to solid by heterogeneous nucleation of vapor-liquid coexisting systems in a closed chamber under reduced pressure were measured more than 50 times under the same experimental conditions by cooling liquid condensate. The sample materials were benzene, <I>p</I>-xylene and water. The phase change to solid in the systems was observed visually to occur either by freezing of liquids or by solidification in vacant sites of a substrate in the same manner as our previous works. It is pointed out experimentally that the phase change to solid by heterogeneous nucleation of the vapor-liquid coexisting systems is a statistical phenomenon dependent on the difference between the pseudo-equilibrium temperature corresponding to the critical vapor pressure and the critical temperature
1995-09-10