Dielectric properties of alcohols (C1-C5) at 2450 MHz and 915 MHz

The dielectric properties of alcohols (C-1-C-5) at 2450 MHz and 915 MHz were measured at different temperatures using a cavity perturbation technique. Dielectric properties were shown to be dependent on temperature, frequency and alcohol type. The dielectric constants increased with temperature at both frequencies; however, there were significant differences in dielectric loss factor. Linear and quadratic equations were developed for each type of alcohol to relate changes in dielectric constant, dielectric loss factor or half power-penetration depth with temperature. These relationships are useful in estimating the volumetric heating of alcohols by microwave energy at 2450 MHz or 915 MHz, analyzing the differentially thermal transition in materials, selecting solvents and shedding some light on microwave-assisted chemical reactions. (C) 2001 Elsevier Science B.V. All rights reserved.