Three dimensional flower like ZnFe2O4 ferrite loaded graphene: Enhancing microwave absorption performance by constructing microcircuits

Facile synthesis of ZIF-67 derived dodecahedral C/NiCO2S4 with broadband microwave absorption performance

“…Moreover, the position of the point where the reflection loss peak is obtained is almost the same as the position on the λ/4 curve, indicating that when the thickness of the material and the incident electromagnetic wave satisfy the λ/4 wavelength relationship, the single-point effective absorption of the electromagnetic wave by the material can be achieved. 69 Fig. 7a and b are the attenuation loss curve and impedance matching curve, respectively.…”

Sodium citrate-induced generation of multi-interfacial embroidered spherical SnO2for augmented electromagnetic wave absorption

“…In the initial stage of the reaction, the sodium citrate carboxyl functional groups are ligated with Sn 2+ and the surface energy of the particles is diminished, furnishing the driving force to crystal aggregation. 33 The SnO 2 grains form self-assembled microspheres due to the lowest energy principle, and grow faster at high temperatures and tend to agglomerate. 34 With the duration of hydrothermal heating, the large grains grow further and the smaller grains gradually disappear with the effect of the driving force, and the self-organization of adjacent small particles forms some small fragments.…”

“…We sequentially mix Na 3 C 6 H 5 O 7 Á2H 2 O and SnCl 2 Á2H 2 O in 80 ml of solvent mixture (C 2 H 5 OH : H 2 O = 1 : 1), and then blend well and transfer to a hydrothermal kettle and keep it heated to 180 1C for a set time. In the initial stage of the reaction, the sodium citrate carboxyl functional groups are ligated with Sn 2+ and the surface energy of the particles is diminished, furnishing the driving force to crystal aggregation 33. The SnO 2 grains form self-assembled microspheres due to the lowest energy principle, and grow faster at high temperatures and tend to agglomerate 34.…”

Construction of a hollow nickel–magnesium ferrite decorated nitrogen-doped reduced graphene oxide composite aerogel for highly efficient and broadband microwave absorption

“…As shown in Fig. 8, in order to evaluate the comprehensive microwave absorption capacity of the NRGO/hollow Ni 0.5 Mg 0.5 Fe 2 O 4 composite aerogel and compare it with recent research results, 15,25,46–51 radar maps were drawn according to four influencing factors of RL min , d , ϕ w and EAB. When the area enclosed by the above four factors is smaller, it indicates that the overall absorption capacity of the absorber is better.…”

“…Recent studies have shown that the complexation of spinel ferrite with RGO to construct RGO/spinel ferrite composites is an effective way to improve the absorption strength and broaden the absorption bandwidth. [15][16][17][18] In addition, reasonable design of the hollow structure, three-dimensional (3D) network and core-shell structure could enhance the microwave absorption capacity of RGO/ spinel ferrite composites. [19][20][21] Up to now, there have been few studies on the preparation and microwave absorption properties of 3D RGO/spinel nickel-magnesium ferrite composites.…”