Flexible composite film of aligned polyaniline grown on the surface of magnetic barium titanate/polyvinylidene fluoride for exceptional microwave absorption performance

Abstract

A rational structure design is always an attractive approach for high-performance microwave absorbers.

Dielectric performance of composites of BaTiO3 and polymers for capacitor applications under microwave frequency

“…From Figure 9(a), the experimental ε' eff of the composites at lower BaTiO 3 content (i.e., up to 20 vol%—actual value for PBTBT30) are in good agreement, as expected. The same parameter deviated for the PBTBT40 and PBTBT50 composites, which may be attributed to effects such as agglomeration of the BaTiO 3 particles, porosity, interface morphology between composite components, homogeneous dispersion and crystal morphology of the BaTiO 3 particles 46–49 . With regard Figure 9(b), the same analytical approach was carried out for the LLDPEBT composites where better agreement between experimental and theoretical values was obtained relative to the PBTBT counterparts.…”

“…The same parameter deviated for the PBTBT40 and PBTBT50 composites, which may be attributed to effects such as agglomeration of the BaTiO 3 particles, porosity, interface morphology between composite components, homogeneous dispersion and crystal morphology of the BaTiO 3 particles. [46][47][48][49] With regard Figure 9(b), the same analytical approach was carried out for the LLDPEBT composites where better agreement between experimental and theoretical values was obtained relative to the PBTBT counterparts. However, as the BaTiO 3 content increased up to 50 vol%, the dielectric permitivitty of LLDPEBT50 sample showed some divergence.…”

Polypropylene Nanocomposite Filled with Spinel Ferrite NiFe2O4 Nanoparticles and In-Situ Thermally-Reduced Graphene Oxide for Electromagnetic Interference Shielding Application

“…The attenuation constant α is an important factor for an outstanding shielding nanocomposite. The attenuation constant signifies the capability for the dielectric loss and magnetic loss [71]. The attenuation constant α has the following relation [72]: α=2πfcμ″ε″−μ′ε′+μ″ε″−μ′ε′2+μ′ε″−μ″ε′2 where f and c are the frequency of electromagnetic wave propagation and the velocity of light, respectively.…”

Concentration and Temperature Dependences of Thermal and Electrical Conductivity of Polymer Hybrid Composites Graphite Nanoplatelets/Fe/Epoxy

“…Recently, much attention has been paid to the development of new composite materials where multicomponent fillers are used: nanocarbon particles in combination with various inorganic fillers, such as ВаТiO3, TiO2, MoS2 with high dielectric constant and in combination with magnetic ones-BaFe12O19, oxides of Fe, Co, Ni, etc. [31][32][33]. Such multiphase composites have already shown themselves to be quite promising for use as shields and absorbers of microwave radiation [34,35].…”