Synchronously enhanced electromagnetic wave absorption and heat conductance capabilities of flower-like porous γ-Al2O3@Ni@C composites

Graphene/silver nanowire aerogel sponge for highly effective electromagnetic energy attenuation

“…S2, † and the semi-circles indicate the multiple dielectric relaxation processes during an alternating electromagnetic field, such as interfacial polarization and dipole polarization. 41,42 Notably, a long tail in Cole-Cole plots may be related to the conductive loss induced by the conductivity framework of a 3D aerogel sponge. 43 Fig.…”

In situ generated gas bubble-directed self-assembly of multifunctional MgO-based hybrid foams for highly efficient thermal conduction, microwave absorption, and self-cleaning

“…6d). 2,5,7,9,11,[35][36][37][38][39][40][41][42][43][44][45][46]48 The heat transfer pathway of foams largely depends on their composition. Herein, MgO/Mg(OH) 2 /C foams are composed of MgO, Mg(OH) 2 , and amorphous C; MgO/Co/C foams consist of Co 0 , MgO, and amorphous C. Heat is transferred via electrons in Co 0 and crystal lattice vibrations (phonons) in MgO, Mg(OH) 2 , amorphous C, and pure silica films.…”

“…The first key issue is the adjustment of electron conductivity. 5 High electron conductivity not merely ensures the effective transmission of free electrons inside materials but promotes the polarization loss and electric conductance loss related to the generation and migration of free and/or local charges. Thus, it is of great significance for the excellent thermal conduction and EMW absorption of electron-dominated materials ( i.e.…”

“…The first key issue is the adjustment of electron conductivity. 5 High electron conductivity not merely ensures the effective transmission of free electrons inside materials but promotes College of Chemistry and Material Sciences, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China. E-mail: tonggx@zjnu.cn; Tel: +86-579-82282269 † Electronic supplementary information (ESI) available.…”

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

“…Therefore, the effective conductivity of resistive electromagnetic-wave-absorbing materials should be controlled in the range of 0.1–10 s/m to ensure the effective absorption of electromagnetic waves. Magnetic-loss-type nanomaterials like ferrite and cobalt–nickel alloys rely on natural resonance and eddy current losses to convert electromagnetic energy into thermal energy. − These materials have high magnetic permeability, but they are easily reflected and susceptible to oxidation. − When compared with the first two materials, dielectric-type nanomaterials have attracted widespread research due to their excellent stability and controllable morphology, as well as their ability to optimize impedance matching. − For the same material, the morphology is different, and the electromagnetic wave absorption properties are not quite the same. Taking tin dioxide as an example, in the work of Lu et al tin dioxide nanoparticles with different morphologies were prepared by the hydrothermal-calcination method.…”