Dielectric properties of Stycast 1266 over the 0.07-300 K temperature range

摘要

We used stycast 1266 in a high-pressure, low-temperature transducer. In order to ascertain the dependence ofcapacitance and loss on temperature, we measured the temperaturebehaviour of the dielectric constant and the dissipation factor ofstycast 1266 at 1 KHz between 0.07 and 300K. We found asmooth decrease of the dielectric constant with decreasing T. Thetemperature dependence below 1 K is well explained by thetunneling model. The loss tangent showed very low values (alwaysless than 5x10-5), with a peak around 260K that can be ascribed todielectric relaxation processes. 2000 Elsevier Science Ltd. All rights reserved.