Electromagnetic interference (EMI) shielding, microwave absorption, and optical sensing properties of BaM/CCTO composites in Ku-band

Study of the dielectric, optical and microstructure properties of CaCu3Ti4O12–PbZr0.48Ti0.52O3 ceramic system with different compositions

“…The lattice constants, we obtain for pure CCTO, and PZT (Table 1) are in good agreement with those reported in literature [15][16][17] . In the case of the (CCTO -PZT) mixture, Rietveld analysis shows that the crystal structure is a composition of both CCTO and PZT structures as separate ones, the same phenomenon has been observed for The BaM/CCTO composites which exhibit a single crystalline phase of both BaM and CCTO 18 . However, we remark a slight change in the lattice parameters.…”

Remarkable microwave absorption efficiency of low loading ratio of Ni0.25Co0.25Ti0.5Fe2O4/SrCoTiFe10O19/Cu composite coated with polyprrole within polyurethane matrix

“…Where V is the volume of nanocrystal and θ is the angle between easy direction and magnetization induced direction by applied field [8]. The calculated value of K is 2.76 HA 2 kg −1 which is a lower than calculated magnetic constant for Sr (96 HA 2 kg −1 ) or CoNi (25 HA 2 kg −1 ) ferrite and this supports the idea of anisotropy increase.…”

“…From other side of view, the saturation magnetization decreases in core/shell structure due to the interparticle interaction at the surface between core and shell and the non-collinearity of the magnetic moments at the interface [9]. Finally, also the presence of copper particles in the composite can hinder the domain wall motions [8].…”

“…The resulted microwave absorbing material was introduced into polyurethane matrix at different loading percentages. The effect of loading percentage on microwave absorption properties was studied using the waveguide method in the range of X-band (8)(9)(10)(11)(12). The mechanism of microwave absorption was investigated by measuring complex permittivity and permeability of the 20%w/w loaded percentage and the dielectric and magnetic tangent losses were estimated.…”

Low frequency electromagnetic shielding efficiency of composites based on ethylene propylene diene monomer and multi‐walled carbon nanotubes

“…It has been reported that shielding of EMR can be performed by three mechanisms: absorption, reflection and the so-called multiply reflection. [5][6][7] Reflection is a primary shielding mechanism that refers to the reflection of electromagnetic plane wave from the external surface of the shielding material. Typically, materials with good ability to shield EMR by reflection exhibit good electrical conductivity.…”