几种计算Grüneisen系数方法的比较研究

Comparative study of some methods for calculating Grüneisen parameter

针对晶格热贡献的格林乃森(Grüneisen)物态方程讨论了计算Grüneisen系数γ的几种物理方法。通过对比研究发现,低压下利用超声测量数据得到的Vinet等温物态方程与相应的冷压线所计算的Grüneisen系数γ与实验数据符合得更好,而高压下由于缺乏有效的直接实验测量数据,只能对各种计算方法所得的结果做一定性的判断,因此需要发展高压下直接测量γ的实验方法,才能为该问题的澄清提供实验支持。

Some methods for calculating Gruneisen parameter are discussed. After comparison, the Gruneisen parameter got from Gruneisen EOS and Vinet EOS is consistent with the experimental data. However, because of the lack of directly measured data for Gruneisen parameter under high pressures, the method can only make the judgment on the results of various calculating methods to a certain extent. So the technology for directly measuring Gruneisen parameter should be developed to solve this problem by experiments.