含盐体系的静态介电常数

The Static Dielectric Constant of Salted Solutions

应用剩余极化的概念和Mori布朗运动方程,得介电常数的计算公式。应用于H_(2)O-LiCl、H_(2)O-NaCl、CH^(3)OH-LiCl,CH_(3)OH-NaCl、CH_(3)OH-Nal、HCONH_(2)-NaI表明,水盐体系的计算值接近实验值,HCONH_(2)-NaI较差。

Applying the definition of extra polarization and Mori's Brown motion equation,we got the secular motion equation for extra polarization from the nonequi-librium standpoint.We have solved the secular Eq.with the help of the assumption of equal effective ionic electric field.It shows not only the ion's radius but also the solution structure and solvent properties are responsible for the per-mittivity decrement.Using the present result,calculations are carried out for the systems of LiCl-CH_(3)OH,NaCl-CH_(3)OH,NaI-CH_(3)OH,NaCl-H_(2)O,LiCl-H_(2)O,KCl-H_(2)O,NaI-HCONH_(2),Comparison among the continuum theory,molecular theory and ours is made,it shows our result is better to the salted system of alchol and water.