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本文提出了一种改进的测微电极,可用来准确地测量高频波段各种温度下介电材料的介电系数、介质损耗角正切和试片的平均厚度。电极系统采用四电极对称结构,可方便地在不同温度下使用排液法,温度变化不影响测量结果,本文还推荐了几种合适的标准液体和其介电系数温度谱的标定方法,从而为液体排代法推广到高频介电温度谱的测量提供了条件。本方法只需测量几次电极间距离的变化和两次谐振电压的比例,就可方便地获得精确的测量结果。其介电系数、介质损耗角正切和试片的平均厚度的测量精度分别可达±0.5%、±7.0%和几微米。
This paper presents an improved micrometer electrode that can be used to accurately measure the dielectric coefficient, dielectric loss tangent and the average thickness of the test piece at various temperatures in the high frequency band. Electrode system using four-electrode symmetrical structure, can be easily used at different temperatures drain method, the temperature does not affect the measurement results change, the paper also recommended several suitable standard liquid and dielectric coefficient temperature spectrum calibration method, which is Liquid displacement method to promote the measurement of high frequency dielectric temperature spectrum provided the conditions. The method only needs to measure the change of the distance between the electrodes and the ratio of the two resonant voltages several times to obtain accurate measurement results conveniently. The dielectric constant, dielectric loss tangent and the average thickness of the test piece accuracy of ± 0.5%, ± 7.0% and a few microns.