Surface potential decay of functional dielectrics after polarization

Abstract

High voltage polarization domains in functional dielectrics and the ability to orient them with an external applied electric field lead to the development of a variety of applications of energy conversion from energy harvesting to information storage and reading. Voids are often generated at the bond interface during the production process of polymer films, which can break down easily in the process of polarization with high voltage, but the voids inside dielectric materials play an important role in charge storage and maintenance if the materials are oriented to the application of electrostatic generator, sensor, actuator and transducer etc. Meanwhile, a polymer matrix doped with a small amount of nanoparticles can suppress charge formation and increase surface charge decay rate. Results obtained in this paper show that polymer materials with microvoids have better maintenance properties of space charge compared with nanocomposite polymer materials. The research result is of important reference value and practical significance in the field of insulation and applications of functional dielectric materials.