State-of-the-art in carbides/carbon composites for electromagnetic wave absorption

Compositional and Hollow Engineering of Silicon Carbide/Carbon Microspheres as High-Performance Microwave Absorbing Materials with Good Environmental Tolerance

“…Silicon carbide (SiC), with diverse microscopic morphology and abundant polymorphs, is a type of very important functional nanomaterials, which have become good catalysts, semiconductors, functional ceramics, and high-frequency electronics due to their outstanding physical, chemical, electrical, and optical properties [ 16 ]. In particular, their relatively low density, excellent thermal stability, and acid/alkali resistance properties give them clear advantages as MAMs with good environmental tolerance [ 17 ]. However, the relatively wide band gap of SiC results in slow electron migration and consequently weak dielectric properties, hindering its widespread application in the field of microwave absorption [ 18 ].…”

“…However, commercial SiC particles or fibers usually have large size, and thus a routine post-treatment method cannot ensure the enough interaction between SiC and carbon components, which means that there still is room to consolidate their microwave absorption performance. As an alternative method, polymer-derived ceramics (PDCs) process is widely employed to prepare homogeneous SiC/C composites through the pyrolysis of polycarbosilane (PCS) [ 17 ]. Although SiC nanoparticles can be in situ generated and uniformly dispersed in carbon matrix with this method, the extremely high pyrolysis temperature of PCS brings considerable difficulties in compositional optimization and EM reinforcement.…”

Multifunctional MoCx Hybrid Polyimide Aerogel with Modified Porous Defect Engineering for Highly Efficient Electromagnetic Wave Absorption

“…The rapid development of communication techniques and wide utilization of electronic devices bring in increasingly serious electromagnetic wave (EW) radiation, which not only causes damage to electronic equipment but also threatens human health. [ 1–5 ] Recently, a variety of electromagnetic wave absorption materials (EWAWs) are designed to satisfy the high‐performance integrating strong absorption capability, broad absorption bandwidth, and lightweight. Despite this progress, they encounter more intricate challenges in the practical application of absorbing materials, particularly within demanding environments characterized by extreme temperatures in industries such as aerospace and defense, requiring them to integrate more functions to adapt to practical demands.…”