A novel sponge-like 2D Ni/derivative heterostructure to strengthen microwave absorption performance

Abstract

One of the major hurdles of Ni-based microwave absorbing materials is the preparation of two-dimensional (2D) Ni flakes that can improve magnetic anisotropy to tune complex permeability.

Gadolinium silicide (Gd5Si4) nanoparticles for tuneable broad band microwave absorption

“…This indicates the excellent EM attenuation power of PGS especially in this frequency region. For an ideal microwave absorber, the impedance matching condition of the absorption material and free space is the prerequisite condition [11]. For that both permittivity and permeability value should be same or similar [11].…”

“…For an ideal microwave absorber, the impedance matching condition of the absorption material and free space is the prerequisite condition [11]. For that both permittivity and permeability value should be same or similar [11]. The impedance matching degree ( ) can be expressed as [11],…”

“…Ferrite based materials such as nickel-zinc ferrite, and cobalt-zinc ferrite are well known, readily available microwave absorbers [7][8][9]. Engineered nano-structures and nano-composites have also been suggested as useful materials for enhanced absorption [10,11]. Hybrid conducting polymer-magnetite nanocomposites such as polyaniline (PANI)-Fe2O3, PANI-NiFe2O4, PANI-CoFe2O4 nanocomposites demonstrate high microwave absorption properties and may be useful for shielding applications [12][13][14], however, stability of a conducting polymer(s) is the challenge [15].…”

Microwave Absorption of Crystalline Fe/MnO@C Nanocapsules Embedded in Amorphous Carbon

“…Overexposure to electromagnetic wave can not only affect the functioning of electronic equipment but also be potentially detrimental to human being and raise severe problems concerning the field of military applications [1][2][3]. Therefore, it has spurred internationally unprecedented interest in exploring microwave absorbing materials, which converts electromagnetic wave into energy in other forms [4,5]. For practical applications, desirable microwave absorbing materials are supposed to possess key features of high absorptive capacity, broad effective bandwidth, light weight, and low filler loading ratio [6][7][8].…”

Performance enhanced electromagnetic wave absorber from controllable modification of natural plant fiber

“…Thus, EMW absorption materials are the rst choice to solve these troubles. 6,7 For years, researchers have been focusing on developing light weight and effective absorber with strong reection loss and broad absorbing bandwidth. 8,9 In the last few years, various carbonaceous materials have always been ideal candidates for EMW absorbing materials due to their controllable structure and properties.…”