Dielectric Properties

  • Reinhard Pottel
Part of the Water book series (WCT)


Suppose a macroscopic uniform electric field E with constant strength (due to free extraneous charges) is present in some aqueous solution of simple ions during the time interval −∞ < t < 0. Moreover, suppose that the field is switched off instantaneously at the time t = 0 and remains zero during the time interval 0 ≥ t > +∞ (also that no macroscopic field due to any bound or free charges exists in the liquid). At times t < 0 the electric field maintains a constant total dielectric polarization (dipole moment density) Ptot (≤0) within the liquid. This polarization consists of several contributions P i of different kinds which, after the field has been switched off, decay with different decay rates (Fig. 1). The origin, the approximate decay time C i (at 25°C), and the approximate magnitude P i (per unit electric field strength) of the polarization of the various types are as follows.


Dielectric Relaxation Hydration Water Small Cation Dielectric Relaxation Time Orientational Polarizability 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Plenum Press, New York 1973

Authors and Affiliations

  • Reinhard Pottel
    • 1
  1. 1.Drittes Physikalisches InstitutUniversität GöttingenGöttingenGermany

Personalised recommendations