The Potential of Silica-Carbon Nanotubes Composite for Electromagnetic Absorber Coating
Elvina Trivida, Aditia Nur Bakti, Alfiyani Az Zahro, Muhammad Fauzan, Qudsiyyatul Lailiyah, Mohamad Khoirul Anam, Haryo Dwi Prananto, Muhammad Imam Sudrajat, Yoppy Yoppy, Oman Zuas, Dwi Mandaris, Nadya Farah · 2024 International Conference on Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET) · 2024
Abstract
The utilization of shielding materials to absorb electromagnetic waves has been widely implemented, especially in military technology and equipment. In this study, we developed a composite material based on silicon dioxide ($\mathbf{S i O}_{2}$) and multi-walled carbon nanotubes (MWCNTs) to enhance the electromagnetic wave absorption compared to single material $\mathbf{S i O}_{2}$. In addition, a marine coating matrix was used in this research. The material characterization was done using scanning electron microscope (SEM) analysis to observe the surface morphology. Meanwhile, a vector network analyzer was used to determine scattering parameters at a frequency range of $4-8 \mathrm{GHz}$ and $8-12 \mathrm{GHz}$. The measurement results showed that the absorber layer of $\mathbf{S i O}_{2} /$ MWCNTs $\mathbf{2 w t} \%$ composite had the highest absorption coefficient of 34.37% at a frequency of 7.66 GHz.