DIELECTRIC PROPERTIES OF MICA PAPER IN VARIABLE TEMPERATURE AND HUMIDITY.

The complex capacitance of mica paper is influenced exponentially by variations in the reciprocal temperature and the relative humidity. This response is dominated by the peripheral line contacts between mica flakes, rather than by the surface impedance of the mica flakes between these contacts. The resulting complex capacitance shows low-frequency dispersion at high humidities and high temperatures, and a less dispersive power law at high frequencies, low humidities and low temperatures. The physical significance of these results is discussed.