On the low frequency dispersion of the electrooptic effects

Summary

The paper studies the factors which could be responsible for the difference between the high and low frequency electrooptic effects, the neglect of which could lead to erroneous conclusions about the particle electric properties. The presented considerations are illustrated by experimental data for an aqueous palygorskite suspension. New possibilities are demonstrated for the obtaining of information from the low frequency dispersion of the electrooptic effects. On the basis of the experimental data concerning the dispersion behaviour of palygorskite, the hypothesis is suggested for the existence of a slow longitudinal electric polarizability acting at frequencies of the applied field below 60 Hz.

Zusammenfassung

In der Arbeit wurden die Faktoren diskutiert, welche für die Unterschiede der elektrooptischen Effekte bei hohen und niedrigen Frequenzen verantwortlich sind. Auf Grund experimenteller Daten mit wäßrigen Palygorskitsuspensionen wird eine langsam longitudinale elektrische Polarisierbarkeit postuliert, die bei den angewandten Feldstärken bei Frequenzen unter 60 cm^-1 wirksam wird.