METHOD OF MEASURING OF DIELECTRIC CHARACTERISTICS OF POLYCRYSTAL LINE MATERIALS, FOR EXAMPLE, FERRITES

摘要

FIELD: testing equipment.;SUBSTANCE: method of measuring of dielectric characteristics of polycrystalline materials concludes in measurement of values of real and imaginary parts (ε’ and ε’’ correspondingly) of permittivity and dielectric loss tangent tgδ of material. According to the method the guard electrode is applied onto surface around one of measuring electrodes, which guard electrode is grounded when making electric measurements. Current-conducting paste is applied on the top of thin-filmed measuring electrodes. While subjecting sample to heating, capacitance and conductivity values are measured at three to five specific frequencies of measuring signal. Specific parameters of material are determined from the results of measurement for any frequency of measuring signal and average values of the parameters are determined for the whole number of frequencies. Values of ε’ , ε’’ and tgδ are determined for arbitrary values of temperature and frequency of measuring signal.;EFFECT: improved precision of measurement of dielectric characteristics.;1 tbl, 3 dwg