二维相变系统Collins模型的统计理论

Kawamura曾利用Collins模型,在忽略4-原子存在的情况下,研究了二维系统的相变。本文进一步考虑4-原子的存在,计算了有空格点存在时系统的吉布斯自由能,研究了4-原子所占百分数对三相点t_t,P_t值以及临界点t_c,p_c值的影响,获得了具有三相点和临界点的完整相图。本文还讨论了相变时各相的面积与温度之间的关系。所得结果与通常的三维物质非常相似。 关键词：

A STATISTICAL THEORY OF THE COLLINS' MODEL IN THE PHASE TRANSITION OF TWO-DIMENSIONAL SYSTEM

By using the Collins' model, Kawamura had studied the phase transition of a two dimensional system. In this work, taking into account the molecular fraction and the presence of the 4-atom, we calculated the Gibbs free energy and studied, the influence of the percent of 4-atom on the parameters of the triple point and the critical point. We obtain a phase diagram showing three phases with a triple point and a critical point. The relation between the extent of each phase and the temperature is calculated along each transition line. The obtained results are quite analogous to the behavior of the three-dimensional substances.