A review of 1D carbon-based materials assembly design for lightweight microwave absorption

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

“…Carbon-based aerogels are regarded as a remarkable candidate for an ideal EMWA absorber, due to their rich porosity, 3D interconnected structure, excellent electrical conductivity, and good chemical stability. 11,12 The rich porosity endows the aerogels storing a high volume of air, which could not only reduce the density of the absorber to some extent but also optimize impedance matching to allow more microwaves enter to the absorber. 13,14 The 3D interconnected structure can form an interconnected conductive network for enhancing conductive loss and create multiple reflecting and scattering to prolong the pathway of microwaves for intensifying attenuation of the microwave energy.…”

“…Carbon-based aerogels are regarded as a remarkable candidate for an ideal EMWA absorber, due to their rich porosity, 3D interconnected structure, excellent electrical conductivity, and good chemical stability. , The rich porosity endows the aerogels storing a high volume of air, which could not only reduce the density of the absorber to some extent but also optimize impedance matching to allow more microwaves enter to the absorber. , The 3D interconnected structure can form an interconnected conductive network for enhancing conductive loss and create multiple reflecting and scattering to prolong the pathway of microwaves for intensifying attenuation of the microwave energy. , Furthermore, the 3D scaffold can integrate other nanoscale microwave absorbers, which further improves the impedance matching and enhances the microwave absorbing capability. , Su et al made use of these advantages of carbon materials to prepare pure carbon aerogels and adjusted the directional structure of the aerogels by changing the carbonization temperature so that materials can achieve excellent EMWA performance . Moreover, the inherent hydrophobicity and thermal stability of carbon-based aerogels afford the absorbers potential applicated in more complex environments. , However, conventional carbon-based aerogels are fragile and easily collapse when subjected to external stress, which is the primary challenge that has to be solved before they can be widely used, especially for high-performance microwave absorbers. , …”

UV-modification of Ag nanoparticles on α-MoCx for interface polarization engineering in electromagnetic wave absorption

“…7,8 Electromagnetic wave materials have a wide range of applications in EMI (electromagnetic interference) shielding [9][10][11] and civilian-military stealth coatings [12][13][14][15] and have thus attracted significant attention. As representative EWAMs, carbon-based composite materials, [16][17][18][19][20][21][22][23][24][25][26][27] transition metallic composites, [28][29][30][31][32][33][34][35] and non-metallic ceramic compounds [36][37][38][39][40] have shown high electromagnetic wave absorption and wide band coverage performances.…”

Enhanced microwave absorption performance of Fe3Al flakes by optimizing the carbon nanotube coatings

“…However, light weight is also important for practical applications specially in the aeronautic and astronautic elds. [20][21][22][23] In this regard, carbon nanotubes (CNTs) are one of the good candidates as dielectric loss absorbers to be coupled with magnetic loss absorbers due to the low density, high aspect ratio, and interesting electrical properties. 24 For example, a composite absorber composed of mesoporous carbon hollow sphere (MCHS)@Co@carbon nanotubes (CNTs) was fabricated, and the CNTs functioned as electron transportation channels to reinforce conductive loss, leading to a strong absorption intensity of −37.3 dB and a wide effective absorption bandwidth of 8.0 GHz.…”