AUTHOR=Du Yu-Hui , Gao Na , Li Mao-Dong , Wang Lei , Wang Guang-Sheng 

TITLE=Preparation and Microwave Absorption Properties of NixSy/PVDF Nanocomposites

JOURNAL=Frontiers in Materials

VOLUME=7

YEAR=2020

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2020.00080

DOI=10.3389/fmats.2020.00080

ISSN=2296-8016

ABSTRACT=<p>Octahedral Ni<sub>x</sub>S<sub>y</sub> nanoparticles and Ni<sub>x</sub>S<sub>y</sub>/PVDF nanocomposites are successfully prepared by solvothermal method. The electromagnetic absorption performance of Ni<sub>x</sub>S<sub>y</sub>/PVDF with different filler content is investigated in the range of 2–18 GHz. An optimal reflection loss value of −32.75 dB at 10.48 GHz is achieved for the filler content of 20 wt%, and the bandwidth &lt;−10 dB can reach up to 4.48 GHz with a thickness of 3 mm. Furthermore, fundamental mechanisms of electromagnetic absorbing is discussed, indicating that the interface polarization, electric dipole polarization, Debye relaxation and impedance matching are the main factors affecting the absorption performance of Ni<sub>x</sub>S<sub>y</sub>/PVDF composites.</p>