The formulas from an interface relaxation equation for the calculation of specific relaxation time and capacitance dispersion frequency are related to the electrophysics parameters of the grain and grain boundary. The calculations of dispersion frequency are coinciding with the measure values qualitatively. 界面驰豫方程确定的特征驰豫时间和电容弥散频率计算式,与晶粒和晶界的电物理参数相关,弥散频率的计算值与实验结果定性相符。