Review of Dielectric Carbide, Oxide, and Sulfide Nanostructures for Electromagnetic Wave Absorption

Abstract

Following the growth of infotech and electronic industries, electromagnetic-wave-absorbing materials play an essential role in the traction of the need for high-precision weaponry and intelligent electronic equipment. The exploitation of high-performance electromagnetic-wave-absorbing materials has emerged as a strategic challenge to be solved in the upgrading of military equipment and civil electromagnetic security. The more maturely studied absorbing materials (carbon, ferrite, etc.) have a single loss mechanism and poor resistance matching, which are already not enough to cover the basic needs. To explore absorbing materials that satisfy both impedance matching and attenuation balance, dielectric nanomaterials have come to the fore. They can realize light weight, thin layer, broad band, and multiband, which have great application prospects. In this review, we start with a summary of typical dielectric loss mechanisms (interfacial polarization, dipole polarization, and conduction loss). Next, diverse carbides, oxides, sulfides, and their composites with dielectric or magnetic materials are described, and the nanostructure advantages and wave-absorbing performance advantages are investigated. Then, the applications of wave-absorbing materials are depicted. Lastly, the challenges faced by dielectric-type materials are outlined, and future development trends are foreseen. Overall, this review offers an overview of the advances in the study of dielectric nanoabsorbing materials.

Lightweight, Compressible, and Multifunctional Organic–Inorganic Nanofibrous Aerogels for Enhanced Microwave Absorption

“…The ever-increasing popularity of electronic equipment and the quick development of advanced wireless communication systems have brought huge convenience to human society. While enjoying these conveniences, unwanted electromagnetic microwave radiation and interference are inevitably generated, which threaten human health and the normal operation of electronic instrument. , Electromagnetic microwave absorption (EMWA) materials play a key role to eliminate electromagnetic microwave pollution by converting the electromagnetic energy into thermal energy of other forms of energy. , Various materials, such as ferrites, metallic oxide, ceramics, and carbon materials, have been developed and exhibited promising EMWA performance. − Unfortunately, these nanomaterials often have shortcomings like large filler content, narrow absorption bandwidth, and inferior stability, which restrict their actual applications to a certain extent. , To overcome this limitation, it is imperative to design novel EMWA materials with lightweightness, thin thickness, strong absorption, and wide bandwidth.…”

Optimization of electromagnetic absorption properties based on graphene, carbon nanotubes, and Fe3O4 multidimensional composites

“…By regulating the cooperative interaction between the dielectric and magnetic properties of the wave‐absorbing materials and the combination of wave‐absorbing materials with different dimensional structures, the composites are thus able to achieve excellent impedance‐matching properties. Therefore, as shown in Figure 1, one of the most significant ways to enhance the property of wave‐absorbing composite materials is to integrate EMW absorption materials with different dimensions and electromagnetic properties 9,10 …”