The Effect of Pressure and Short Thermal Exposition on Dielectric Properties of Printed PET-G Material

Space charge accumulation in the inner structure of dielectric material is a significant factor in it’s electric degradation and thus affects the longevity of entire direct current (DC) insulation system. This study investigates a novel approach to space charge accumulation mitigation in 3D printed dielectric materials via short thermal exposition under applied pressure. The material for this experiment was chosen Polyethylene terephthalate glycol (PET-G), which shows a promising application possibilities in dielectric systems. For evaluation of this experiment, complex measurement methods of Pulse electroacoustic method (PEA) and Broadband dielectric spectroscopy (BDS) complimented by volume resistivity measurements were employed. The experimental results show a significant reduction in space charge accumulation following the thermal exposition under mechanical pressure, which leads to improved electrical properties of dielectric material used. These findings highlight the potential of this simple technique in enhancing the performance and reliability of dielectric materials for a wide range of DC electrical applications.