介电常数

The study showed that the property of grain triboelectrification relates to grain moisture, friction velocity, dielectric constant and friction material.

表明，稻谷摩擦带电与稻谷含水率、摩擦速度、稻谷介电常数以及摩擦材料等因素有关。

As both insulator and energy storage media, de-ionized water combines the advantages of high relative permittivity(is about 80), self repairability, low cost and ease of handling.

水介质具有高相对介电常数(约80),而且具有自我恢复能力,在脉冲功率系统中被广泛应用。