Dielectric properties measurement method in the microwave frequencies range for non-polar/polar liquid mixtures characterization
Abstract
We present a method based on dielectric properties measurements over a large spectrum of frequencies, in the
microwave (MW) domain, in order to characterize a liquid mixture. The liquid mixtures consist of non-polar fluids
(silicone oil, diesel fuel) and polar additives, in order to increase the specific MW absorption of the mixture for further
MW power processing. We have measured the MW specific absorptions for mixtures of silicone oil with 20% and 30%
(w/w) isopropanol. In both cases, the mixtures are sufficiently stable over time to allow further studies of thermal
convection dynamics initiated by MW heating. For a mixture of diesel fuel with 10% (w/w) alkyl polyglycoside, the main
observation was that its MW specific absorption varies over time after the mechanical mixing process.