测定固态试样相对电容率的几种方法

Several methods for determining the relative capacitance of solid samples

测定电介质材料的相对电容率,最好采用板状试样,因此以平行板电容器为载体测定固态试样的相对电容率是较优的方法。从可操作性及便捷性来看,测定试样相对电容率的方法有三种:一是以干燥空气环境代替真空环境,运用相对电容率的基本定义式进行测定;二是运用直流电路中已知电容器与待测电容器的串联关系,结合电容器电容的基本计算公式进行测定;三是综合运用交流电路中电容器电流有效值、电压有效值、容抗之间的关系式,及其电容、容抗的基本计算公式进行测定。

Determination of the relative permittivity of the dielectric material,it is best to use the plate specimen,so the parallel plate capacitor as the carrier to determine the relative capacitance of the solid sample is a better way. From the operability and convenience point,there are three methods to determine the relative permittivity of the sample：one is to use dry air environment instead of vacuum environment, to determine by using the definition formula of relative permittivity;two is to use the series relations between known capacitor and measure capacitor in DC test,to determine combined with the basic formula the capacitance of the capacitor; the three is to determine by the relationship between the comprehensive use of AC circuit capacitor current RMS, RMS voltage, capacitance,capacitance,capacitance and the basic calculation formula.