Space charge patterns under thermal gradient

Direct observation of space charge injection and transport in solid dielectrics, as well as their spatial evolution over time, is of great importance in the investigation of design stress and the aging mechanism of engineering dielectrics under high electrical DC field. Through model-aided design, the parallel plate, pulsed-electroacoustic space charge profiling technique is extended to include thermal gradient in thin films. The space charge behavior and dynamics within flat dielectric specimens in the presence of thermal gradient have been studied extensively through the modified pulsed-electroacoustic system, to provide insights into the high-field aging mechanisms of new materials developed for energy efficient power devices and renewable integration.