Effect of Pressure on the Dielectric Properties of Ice I

Abstract
The effect of pressure up to about 2 kbar on the dielectric properties of Ice I at − 23.4° has been measured. The static dielectric constant increases with increasing pressure by about the amount predicted by the Kirkwood theory. The increase in relaxation time yields a volume of activation for the relaxation process of 2.9±0.2 cm3 mole−1 which supports current views that dielectric relaxation occurs by rotation at orientational defects. The volume of activation given by the rapid rise of dc conductivity with increasing pressure is − 11±∼3 cm3 mole−1 which is consistent with the proton‐transfer mechanism.

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