Double Layer Material Designed to Reduce Electromagnetic Radiation with Carbon Black, Silicon Carbide and Manganese Zinc Ferrite

Souza, Ariane Aparecida Teixeira de; Medeiros, Nila Cecília de Faria Lopes; Medeiros, Leonardo Iusuti de; Amaral-Labat, G.; Bispo, Matheus Carvalho; Silva, Guilherme Frederico Bernardo Lenz e; Boss, Alan Fernando Ney; Baldan, Maurício Ribeiro

doi:10.1590/jatm.v13.1199

Cited by 3 publications

(2 citation statements)

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“…The electromagnetic properties of the composite were evaluated by a vector network analyzer (VNA; N5235A Keysight Technologies), using a Ku-Band (12.4-18 GHz) rectangular cross-section waveguide kit (P11644A). The dielectric properties (ε=ε'-jε'') 14,33,41 were obtained using the Nicolson-Ross-Weir (NRW) method, while the reflectivity was measured by the VNA using a metallic plate, as already explained elsewhere 42 .…”

Section: Methodsmentioning

confidence: 99%

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Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Medeiros

Silva

et al. 2022

Mat. Res.

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Carbonaceous porous materials are strong candidates for producing low-cost, lightweight, and sustainable electromagnetic (EM) absorbing materials. This work investigates the production of radarabsorbing materials (RAM) by a simple method. Sustainable carbon xerogel (CX) was synthesized from tannin, a biosourced molecule. CX and commercial carbon nanotube (CNT) were embedded in a silicone matrix at proportions of 10 and 15 wt.% of CX and 0.1 wt.% of CNT to produce flexible composites. The morphology and structure of the carbonaceous materials were evaluated by fieldemission scanning electron microscopy (FEG-SEM), Raman spectroscopy, X-ray diffraction (XRD), textural properties by N 2 adsorption-desorption isotherms, and mercury porosimetry. The electromagnetic characterization of the composites was analyzed by a vector network analyzer (VNA) in the Ku-band. The results demonstrated that an increased concentration of CX in the composite improved reflection loss reaching -43.19 dB at 13.79 GHz.

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Section: Methodsmentioning

confidence: 99%

“…The complex permittivity of all samples 10CX, 15CX, 10CX/0.1CNT, and 15CX/0.1CNT are illustrated in Figure 9. The real (ε') and imaginary parts (ε'') of permittivity are related to the capacitive and dissipative effects in the material 29,41 .…”

Section: Electromagnetic Characterizationsmentioning

confidence: 99%