液体中静态介电常数随温度渡越行为及其关联特征研究

Study on the crossover of static dielectric constants of liquids with temperature and the relevant correlations

为了通过液体静态介电常数随温度的变化行为,归纳总结液体中分子间取向关联极化的一般规律,在现有的文献中,筛选了分子的电子极化远小于分子间取向关联极化的18种液体材料,并对其静态介电常数随温度的变化行为进行了分析研究.结果表明,液体中静态介电常数随温度变化存在一个普遍的渡越行为,并且对应于该种渡越,至少存在两种分子之间的取向关联序,一种随温度降低而增强,而另一种则减弱.

In order to induce the general behaviors of the orientation correlations between molecules from the variation of static dielectric constant of liquid with temperature,we filtrate the experimental data of 18 kinds of liquids with the contribution of the electronic polarizations much smaller than that of the orientation correlations between molecules from the present references.The results indicate that there is a universal crossover for the varication of the static dielectric constants of the liquids with temperature,and for such a kind of crossover,there exist at least two kinds of orientation correlation orders between molecules,one increases but the other decreases with temperature.