Amorphous Carbon Regulates Defects to Achieve TaC Nanowires with Enhanced Microwave Absorption

Abstract

Carbon/carbon composite materials, as electromagnetic wave-absorbing (EWA) materials, have been widely studied due to their excellent impedance matching and high dielectric loss. In this work, we introduced amorphous carbon into the TaC nanowire (TaC nws ) matrix, effectively optimizing impedance matching. The inclusion of amorphous carbon introduces a substantial quantity of imperfections and interfaces, thereby promoting polarization. The multipolarization loss and magnetic loss mechanism generate electromagnetic synergistic loss effects, significantly improving the attenuation performance of EW. The TaC nws /C sample exhibits exceptional EWA performance, achieving a minimum reflection loss (RL min ) of −54.25 dB and an effective absorption bandwidth (EAB) of 3.6 GHz at a low thickness of merely 1.4 mm. This study presents a novel methodology for the future fabrication of TMC composite materials, thereby holding substantial research implications.

Facile synthesis of eco-friendly mango peel-derived porous carbon for optimizing microwave absorption

“…Typically, a higher value suggests a higher presence of material defects and a lower level of graphitization. The increased quantity of defects and amorphous carbon promotes the development of dipole and interfacial polarization, which are primary mechanisms for attenuating microwaves [24]. Whereas, a lower value indicates a higher degree of graphitization, which is beneficial for enhancing conductivity loss [25].…”