Measurement of dielectric properties at high-temperatures in real-time with cylindrical cavity

Abstract

A simple and fast expression based on perturbation method is described and used to characterize high temperature material in real-time. The expression considers the effect of the sample holder that contains the material and the effect of the insertion hole on the top.

Microwave enhanced roasting for pyrite ore samples with dielectric properties strongly dependent on temperature

“…The first one is able to calculate the complex permittivity of a sample located inside a vial, at a given temperature, and can be used for measuring powders, liquids, and solids (provided that they are machined to match the shape of the vial) [23]. The second one is able to measure the resonant frequency (f) and the quality factor (Q) of a cylindrical cavity in real time, while heating the sample, and it is similar to the one developed in [24]. Combining this information, and using resonant frequency and quality factor readings for air, interpolations can be calculated and plots can be generated for each mineral, as it will be described below.…”