Abstract
In this study, a novel ceramic composite with a graphene-CNTs-graphene sandwich structure is successfully synthesized. The parallel arranged graphene layers and carbon nanotubes (CNTs) possess a beneficial reflect-attenuate-reflect synergistic effect. This results in outstanding electromagnetic interference (EMI) shielding performance. The ε′ and tanδ of the sample with 5 vol% graphene and 0.5 vol% CNTs increase significantly, from 9.1 to 44 and 10−4 to 2.7, respectively. In addition to the reflection effect of graphene layers, multi-reflected electromagnetic waves are constantly attenuated by CNTs during propagation. The absorption loss (SEA) increases from nearly zero to 25 dB leading to an absorption-dominated EMI shielding effect and the highest total shielding effectiveness (SET) is 39 dB. The composites are thermal stable below 550 ℃ and the oxidation rate increases rapidly until the temperature exceeds 700 ℃. These results indicate G/CNT-Al2O3 with a sandwich structure is a promising EMI shielding material.
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 callDisclaimer: 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.
