NRC conference reviews insulation

The Polarization Parameters of Several Solid Dielectrics and Their Changes With Temperature and Composition; R. F. Field. It has been shown by K. S. and R. H. Cole that the plot of loss factor against dielectric constant for a single polarization of any dielectric is a circular arc with its center depressed below the dielectric-constant axis. Three parameters are sufficient for specifying the polarization: (1) the change in dielectric constant from zero to infinite frequency (2) the relaxation frequency (3) the storage coefficient defined as the ratio of the depression angle to a right angle and proportional to the ratio of the stored to dissipated energy in the polarization mechanism.