Measurements of low frequency dielectric permittivity for moistened dispersed media at negative temperatures
The peculiarities of the measurements of temperature dependence on dielectric permittivity for moistened dispersed media at low frequency are considered. Specified are the errors of the earlier measurements, which have ignored the influence of the sample's size, the probing electric field strength, the phase transition peculiarities and the percolation effect. The method of simultaneous electric and calorimetric measurements is examined. The results (confirming the necessity of taking into account the above-mentioned factors) of measurements of dielectric parameters for moistened sand and pinewood are presented.