Abstract
Tetra-needle-shaped zinc oxide whisker/polytetrafluoroethylene (T-ZnOw/PTFE) composites with low threshold field were prepared via compression molding and sintering process. The addition of T-ZnOw endowed the T-ZnOw/PTFE composites a remarkable nonlinear conductivity characteristic under applied electric field. Dependence of threshold field on the concentration of T-ZnOw was observed. With increased T-ZnOw fillers loading, the threshold field of composites decreased while the conduction current density increased, which showed a nonlinear electrical conduction characteristic. The dielectric constant increases with the increasing of T-ZnOw loading. While the volume resistivity and breakdown strength of the composites decreased with increasing the loading of T-ZnOw. Compared with pure PTFE, T-ZnOw/PTFE composites with 30 wt% T-ZnOw loading also displayed a significant improved thermal conductivity and a low thermal expansion coefficient (TEC), which properties were important in practical application.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IEEE Transactions on Dielectrics and Electrical Insulation
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
