Investigation of electromagnetic wave absorption properties of Ramphal leaves

• Published in: Journal of materials science. Materials in electronics 2023-05, Vol.34 (15), p.1207, Article 1207
• Main Authors: Panda, Saran Srihari Sripada, Gandi, Suman, Panigrahi, Trilochan, Parne, Saidi Reddy
• Format: Article
• Language: English
• Subjects: Absorption; Ashes; Bandwidths; Calcium carbonate; Characterization and Evaluation of Materials; Chemistry and Materials Science; Differential thermal analysis; Electromagnetic radiation; Emission analysis; Fourier transforms; Infrared analysis; Infrared spectroscopy; Lactic acid; Materials Science; Network analysers; Optical and Electronic Materials; Raman spectroscopy; Silicon dioxide; Spectroscopic analysis; Spectrum analysis; Structural analysis; Superhigh frequencies; Thickness; Three dimensional printing
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-10610-8

In this study, we report a simple, cost-effective technique to absorb electromagnetic (EM) waves using Ramphal ( Annona reticulata ) leaves ash. The structural and physical characterization of the ash powder was performed using x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), thermogravimetric analysis/differential thermal analysis (TGA/DTA), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), and ultraviolet–visible (UV–Vis) spectroscopy. The structural analysis results confirmed the presence of elemental composites of CaO, CaCO 3 , KCl, MgO, SiO 2 , C, and P in the Ramphal leaves ash powder. As part of the electromagnetic wave absorption studies, a vector network analyzer was used along with 3D-printed poly lactic acid (PLA) blocks to mount the powder Ramphal leaves ash powder to facilitate the absorption of EM waves. The results show that the bare Ramphal leaves ash at a thickness of 7 mm provides the high Reflection Loss (RL max ) of − 42.87 dB at 11.60 GHz. In addition, Ramphal ash combined with the 3D-printed block shows an RL max of − 22.43 dB at 11.41 GHz with an absorption bandwidth of 2.48 GHz in the X-Band region. Furthermore, computational simulation results show that Ramphal leaves at a thickness of 9.5 mm provide an RL max of − 66.36 dB at 11.41 GHz with a 100% effective absorption bandwidth (EAB). This demonstrates the potential for using Ramphal leaves ash for the absorption of EM waves.