Dielectric Properties of PTFE Matrix Modified with Soda Lime Silicate Glass at X-Band Frequency

Abstract

The purpose of this work was to prepare and develop a low-cost polytetrafluoroethylene (PTFE) filled with recycled soda lime silicate glass (SLS). The SLS powder was prepared using a ball milling technique. PTFE/SLS composites were fabricated by dispersing 25, 45, 63, 90, and 106 m of the SLS powder in the PTFE through the dry powder processing technique. The fabricated composites were characterised by scanning electron microscopy (SEM). The SEM images showed better filler distribution at 106 m with SLS particle agglomeration at lower filler sizes. The results of dielectric properties characterised at 8.2 GHz indicated that the ???????? and ???????????????? varied from 2.22, 0.0018 and 2.18, 0.0016 at 25 and 106 m, respectively. The ???????? and ???????????????? further decreased from 2.20, 0.0017 and 2.16, 0.0015 at 12.4 GHz, respectively. Thus, the PTFE/SLS composites exhibited low ???????? and ???????????????? suitable for microwave substrate application.