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 pro-ose altemative 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 differcnt volumetric proportions, are in close agreement with their predicted values.