EVALUATION OF THE DIELECTRIC AND SEMI-CONDUCTOR COATING EFFECTS ON THE MICROWAVE ABSORPTION PROPERTIES OF METALS

Authors

Keywords:

COMSOL Multiphysics, Dielectric coating, Microwave absorption, Semiconductor coating, Coating thickness

Abstract

This research evaluated the effects of dielectric and semiconductor coatings on the microwave absorption properties of three metals: aluminum, copper, and zinc. Using COMSOL Multiphysics software, simulations were performed to analyze the interaction of microwave radiation with these metals, both in their uncoated form and when coated with dielectric and semiconductor materials of varying thicknesses. The study involved creating geometric models, applying material properties, and conducting frequency domain analyses to determine absorption characteristics. The results revealed that coating thickness played a critical role in improving microwave absorption. Optimal thicknesses for dielectric coatings reduced reflectivity and provided impedance matching layers that facilitated greater microwave penetration. Semiconductor coatings further increased absorption due to their tunable conductivity and effective loss mechanisms, which efficiently converted microwave energy into heat. Aluminum and copper exhibited low absorption in their uncoated form due to high electrical conductivity and reflectivity, while zinc displayed moderate absorption. When coated, all three metals demonstrated significantly enhanced absorption, with the impact varying based on coating type and thickness. These findings have significant implications for applications in electromagnetic interference (EMI) shielding, microwave devices, and materials science. By understanding the influence of coating thickness on microwave absorption, this study provides insights for optimizing material designs and tailoring coating parameters to enhance performance for shielding technologies and microwave absorption applications. This research highlights the potential of coatings to overcome the limitations of metals and improve their functionality in diverse technological and industrial fields.

Dimensions

Antennas, P., & Barkley, S. J. (2019). Dynamic Control of Composite Solid Propellant Flame Spread Through Microwave Eddy Current Heating of. Journal of Quantitative Spectroscopy and Radiative Transfer, 13(January), 18. https://doi.org/10.2514/6.2019-1239

Bartolomeo, A. Di. (2016). Graphene Schottky diodes: An experimental review of the rectifying graphene / semiconductor heterojunction. Physics Reports, 606, 158. https://doi.org/10.1016/j.physrep.2015.10.003

Biswas, P., Mulholland, G. W., Rehwoldt, M. C., Kline, D. J., & Zachariah, M. R. (2020). Journal of Quantitative Spectroscopy & Radiative Transfer Microwave absorption by small dielectric and semi-conductor coated metal particles. Journal of Quantitative Spectroscopy and Radiative Transfer, 247, 106938. https://doi.org/10.1016/j.jqsrt.2020.106938

Dragoman, M., Cismaru, A., Aldrigo, M., Radoi, A., Dinescu, A., & Dragoman, D. (2023). MoS2 thin films as electrically tunable materials for microwave applications. Journal of Electrical Tunable Materials for Microwave Applications, 20(May). https://doi.org/10.1063/1.4938145

Gracia, J., Escuin, M., Mallada, R., Navascues, N., & Santamaria, J. (2016). Nano-heaters: New insights on the outstanding deposition of dielectric energy on perovskite nanoparticles. Nano Energy, 20, 2028. https://doi.org/10.1016/j.nanoen.2015.11.040

Haneishi, N., Tsubaki, S., Abe, E., Maitani, M. M., & Suzuki, E. (2019). Enhancement of Fixed-bed Flow Reactions under Microwave Irradiation by Local Heating at the Vicinal Contact Points of Catalyst Particles. Scientific Reports, 21(November 2018), 112. https://doi.org/10.1038/s41598-018-35988-y

Meir, Y., & Jerby, E. (2012). Thermite powder ignition by localized microwaves. Combustion and Flame, 159(7), 24742479. https://doi.org/10.1016/j.combustflame.2012.02.015

Mirzaei, A., & Neri, G. (2016). Sensors and Actuators B: Chemical Microwave-assisted synthesis of metal oxide nanostructures for gas sensing application: A review. Sensors & Actuators: B. Chemical, 237, 749775. https://doi.org/10.1016/j.snb.2016.06.114

Stockman, E. S., Zaidi, S. H., Miles, R. B., Carter, C. D., & Ryan, M. D. (2009). Measurements of combustion properties in a microwave enhanced flame. Combustion and Flame, 156(7), 14531461. https://doi.org/10.1016/j.combustflame.2009.02.006

You, A., Be, M., & In, I. (2007). Microwave heating of conductive powder materials . Journal of Appliied Physics, 023506(June 2004). https://doi.org/10.1063/1.2159078

Published

17-02-2025

How to Cite

EVALUATION OF THE DIELECTRIC AND SEMI-CONDUCTOR COATING EFFECTS ON THE MICROWAVE ABSORPTION PROPERTIES OF METALS. (2025). FUDMA JOURNAL OF SCIENCES, 9(2), 28-34. https://doi.org/10.33003/fjs-2025-0902-3054

Issue

Vol. 9 No. 2 (2025): FUDMA Journal of Sciences - Vol. 9 No. 2

Section

Research Articles
Copyright & Licensing

How to Cite

EVALUATION OF THE DIELECTRIC AND SEMI-CONDUCTOR COATING EFFECTS ON THE MICROWAVE ABSORPTION PROPERTIES OF METALS. (2025). FUDMA JOURNAL OF SCIENCES, 9(2), 28-34. https://doi.org/10.33003/fjs-2025-0902-3054