Advancements in electromagnetic microwave absorbers: Ferrites and carbonaceous materials

Abstract

Overview

With rising concerns over electromagnetic (EM) radiation from various electronic and communication devices, this study focuses on the critical evaluation of novel materials designed for high EM absorption. This review navigates through the latest advancements in this field.

Findings

• Detailed examination of the interaction between EM radiation and absorbing materials, focusing on phenomena such as multiple reflections, scattering, and polarization.
• Discussion on losses affecting microwave absorber performance like magnetic and dielectric losses, each with distinct implications on the effectiveness of microwave absorbers.
• Comprehensive insights into various microwave-absorbing materials including metal composites, magnetic materials, conducting polymers, and notably, carbonaceous materials like carbon fiber, porous carbon, and graphene oxide.

Conclusion

This review illustrates the promising potential of magnetic and carbon-based dielectric composites in microwave absorption. The text highlights the necessity of formulating composite mixtures that incorporate both dielectric and magnetic fillers to optimize performance, which involves precision in intrinsic properties, interfacial polarization, development of conductive networks, and microstructure design. Additionally, the paper outlines significant challenges and strategies for future enhancements in this field.