Electromagnetic interference shielding effectiveness and microwave absorption properties of thermoplastic polyurethane/montmorillonite-polypyrrole nanocomposites

2018 ◽  
Vol 29 (5) ◽  
pp. 1377-1384 ◽  
Author(s):  
Sílvia D. A. S. Ramoa ◽  
Guilherme M. O. Barra ◽  
Claudia Merlini ◽  
Sébastien Livi ◽  
Bluma G. Soares ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Electromagnetic Interference ◽  
Thermoplastic Polyurethane ◽  
Shielding Effectiveness ◽  
Electromagnetic Interference Shielding ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Electromagnetic Interference Shielding Effectiveness

scholarly journals Dielectric and electromagnetic interference shielding properties of high entropy (Zn,Fe,Ni,Mg,Cd)Fe2O4 ferrite

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Adrian Radoń ◽  
Łukasz Hawełek ◽  
Dariusz Łukowiec ◽  
Jerzy Kubacki ◽  
Patryk Włodarczyk
Keyword(s):  
Electrical Conductivity ◽  
Microwave Absorption ◽  
Electromagnetic Interference ◽  
Average Crystallite Size ◽  
Shielding Effectiveness ◽  
Absorption Properties ◽  
Ac Electrical Conductivity ◽  
Microwave Absorption Properties ◽  
High Entropy ◽  
Two Stages

AbstractThe new (Zn,Mg,Ni,Fe,Cd)Fe2O4 high entropy ferrite with average crystallite size 11.8 nm was synthesized in two stages by annealing of co-precipitated amorphous precursor. The dielectric spectroscopy confirms, that the electrical conductivity and polarization processes are associated with the mobility of electrons in the structure of ferrite. It was concluded, that the both, high frequency complex dielectric permittivity as well as complex magnetic permeability are strongly temperature and frequency dependent. The AC electrical conductivity is associated with quantum mechanical tunneling of electrons and related to the transfer of charge carriers between Fe2+ and Fe3+ ions. Moreover, the microwave absorption properties were determined. The best microwave absorption properties have been confirmed in the frequency range 1.9 to 2.1 GHz for a layer which is 0.8–1 cm thick. For this range, reflection loss (RL) is lower than −25 dB and shielding effectiveness (SE) lower than −50 dB.

Improved microwave absorption and electromagnetic interference shielding properties based on graphene–barium titanate and polyvinylidene fluoride with varying content

2017 ◽  
Vol 1 (12) ◽  
pp. 2519-2526 ◽  
Author(s):  
Ao-Ping Guo ◽  
Xiao-Juan Zhang ◽  
Jia-Kang Qu ◽  
Shan-Wen Wang ◽  
Jia-Qiang Zhu ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Electromagnetic Interference ◽  
Polyvinylidene Fluoride ◽  
Core Shell ◽  
Electromagnetic Interference Shielding ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Shielding Properties ◽  
Sample Method ◽  
Method Show

The rGO/BT/PVDF core/shell architectures synthesized with a sample method show superior microwave absorption properties.

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