Parali L.2024-07-222024-07-22201503043886http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16220The fluorine-containing polymer composite filled with piezo-ceramics such as PZT-2, PZT-5A, PZT-8 were prepared by a hot pressing method. The electret composites were treated by an electric discharge plasma process, formed by crystallization via electro-thermal treatment, and polarized. The surface charge density and the charge relaxation time of the electret composite were investigated using thermo-stimulated depolarization and their potential differences were defined via a contactless measurement method. According to the obtained experimental results, the stability of the electret charge of a composite based on F42 + PZT-5A is better than a composite based on F3 + PZT-8. © 2015 Elsevier B.V..EnglishCopolymersElectretsFilled polymersFluorineFluorine containing polymersHot pressingPlasma theoryPolymersActive compositesCharge relaxation timeContactless measurementCrystallized polymersDischarge plasmaElectret effectsHot pressing methodPotential differenceElectric dischargesArticle10.1016/j.elstat.2015.05.012