Determination of the Permittivity and Loss Factor of Mixtures of Liquid Dielectrics

A review of the available formulas for predicting the complex permittivity of mixtures of dielectrics has revealed some of their limitations. The authors propose alternative formulas, which are straightforward and less time consuming. Measured values of e and e″, obtained from experiments conducted on mixtures of transformer oil, cottonseed oil, and castor oil in different volumetric proportions, are in close agreement with their predicted values. Copyright © 1972 by The Institute of Electrical and Electronics Engineers, Inc.