Messungen der Dielektrizitätskonstanten von reinem und NH4F-dotiertem Eis

The dielectric constant of pure and NH₄F doped ice single crystals has been measured at temperatures around — 10°C in the frequency range between 0.07 and 500 kc/s. The values measured on pure ice are in agreement with the Debye theory. At frequencies around 0.1 kc/s the dielectric constant?′ of doped crystals is higher than that of pure ice. Treating the frequency as a parameter, the dielectric constant?′ goes through a maximum and a minimum with rising NH₄F concentration. No dependence of the Debye dispersion frequency on the doping concentration could be detected.