Synthesis of multi-walled carbon nanotube/doped barium hexaferrite nanocomposites: An investigation of structural, magnetic and microwave absorption properties

Nikmanesh, Hossein; Moradi, Mahmood; Bordbar, G. H.; Alam, Reza Shams

doi:10.1016/j.ceramint.2016.05.089

Cited by 51 publications

(15 citation statements)

References 36 publications

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“…Incorporation of a spiraled MWCNTs/BaFe 12 O 19 hybrid into epoxy resin showed the highest microwave absorption of more than 99.9%, with a minimum reflection loss of − 43.99 dB and an absorption bandwidth of 2.56 GHz [23]. The values of the real and imaginary parts of the permittivity of BaCu x Mg x Zr 2x Fe 12−4x O 19 /MWCNTs nanocomposites with different substitutions were much higher than those of the corresponding samples without MWCNTs [12].…”

Section: Introductionmentioning

confidence: 95%

“…In [10], the microwave absorption properties of composites with carbon fiber/Fe 3 O 4 and graphene/BaFe 12 O 19 /Fe 3 O 4 were studied, and the analysis showed that the presence of non-magnetic carbon fiber and graphene causes a significant reduction in coercivity while maintaining reasonable saturation and remnant magnetization, thereby improving the microwave absorption capability of the prepared composites. Therefore, combining fillers such as carbon nanotubes (dielectric component) and hexaferrites (magnetic component) serves to improve the electromagnetic response of composite materials [11][12][13]. With the exception of a high absorption intensity and a wide absorption bandwidth, such composites could be thin and lightweight [14].…”

Section: Introductionmentioning

confidence: 99%

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Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

et al. 2021

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The microwave properties of epoxy composites filled with 30 wt.% of BaFe12–xGaxO19 (0.1 ≤ x ≤ 1.2) and with 1 wt.% of multi-walled carbon nanotubes (CNTs) were investigated in the frequency range 36–55 GHz. A sufficient increase in the microwave shielding efficiency was found for ternary 1 wt.%CNT/30 wt.% BaFe12–xGaxO19/epoxy composites compared with binary 1% CNT/epoxy and 30 wt.% BaFe12–xGaxO19/epoxy due to the complementary contributions of dielectric and magnetic losses. Thus, the addition of only 1 wt.% of CNTs along with 30 wt.% of barium hexaferrite into epoxy resin increased the frequency range where electromagnetic radiation is intensely attenuated. A correlation between the cation Ga3+ concentration in the BaFe12–xGaxO19 filler and amplitude–frequency characteristics of the natural ferromagnetic resonance (NFMR) in 1 wt.%CNT/30 wt.% BaFe12–xGaxO19/epoxy composites was determined. Higher values of the resonance frequency fres (51.8–52.4 GHz) and weaker dependence of fres on the Ga3+ concentration were observed compared with pressed polycrystalline BaFe12–xGaxO19 (fres = 49.6–50.4 GHz). An increase in the NFMR amplitude on the applied magnetic field for both random and aligned 1 wt.% CNT/30 wt.% BaFe12–xGaxO19/epoxy composites was found. The frequency of NFMR was approximately constant in the range of the applied magnetic field, H = 0–5 kOe, for the random 1 wt.% CNT/30 wt.% BaFe12–xGaxO19/epoxy composite, and it slightly increased for the aligned 1 wt.% CNT/30 wt.% BaFe12–xGaxO19/epoxy composite.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

et al. 2021

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“…According to Figure 4, coating in the presence of saccharin leads to larger hysteresis loop area and, consequently, higher microwave absorption. Moreover, shape anisotropy along nickel blade shape nanostructures, which have been grown in different direction, participates in the absorption coefficient and shift the resonance peak [24] of this sample effectively.…”

Section: Microwave Shieldingmentioning

confidence: 99%

Improving the microwave absorption in Ni-coated fabrics by saccharin addition in plating bath

Hoghoghifard¹,

Mokhtari

2018

Journal of Industrial Textiles

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Polyester fabrics are coated uniformly by nickel thin film nanostructure with 200 nm thickness by electroless plating method. This study investigates the effect of saccharin as an additive in plating solution, on the morphology, grain size, crystallinity, surface resistivity, and magnetic properties of the coated fabrics which influences the microwave shielding strongly. The morphology changes from spheroid to blade shape with an average grain size of 85 ± 10 nm and the surface resistivity reached to its lowest value in 5 g l−1 saccharin concentration. It has been seen that the crystallinity is modified and the magnetic behavior becomes softer in the presence of the additive. The measurements on microwave shielding effect in 8.2–18 GHz frequency range exhibited 98–90 and 96–85% effective transmission loss (without and with the additive) by flexible and lightweight Ni-coated fabrics. The shielding effect becomes dominated by the absorption mechanism as higher eddy current loss, higher magnetic hysteresis loss, and shape anisotropy along blade shape nanostructure while saccharin is added to plating bath.

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“…In recent years, spinel ferrites have been extremely studied for their effective application in microwave devices, information storage systems, sensors, loading coils, magnetic uids and medical diagnostics. [1][2][3][4][5][6] Thus, much attention has been focused on the preparation and characterization of these materials. [6][7][8] Spinel ferrites have the general chemical formula (A 2+ ) [ and trivalent (i.e.…”

Section: Introductionmentioning

confidence: 99%

Positron annihilation lifetime, cation distribution and magnetic features of Ni_1−xZn_xFe_2−xCo_xO₄ ferrite nanoparticles

et al. 2017

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Synthesis of multi-walled carbon nanotube/doped barium hexaferrite nanocomposites: An investigation of structural, magnetic and microwave absorption properties

Cited by 51 publications

References 36 publications

Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

Improving the microwave absorption in Ni-coated fabrics by saccharin addition in plating bath

Positron annihilation lifetime, cation distribution and magnetic features of Ni_1−xZn_xFe_2−xCo_xO₄ ferrite nanoparticles

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Synthesis of multi-walled carbon nanotube/doped barium hexaferrite nanocomposites: An investigation of structural, magnetic and microwave absorption properties

Cited by 51 publications

References 36 publications

Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

Electromagnetic Properties of Carbon Nanotube/BaFe12−xGaxO19/Epoxy Composites with Random and Oriented Filler Distributions

Improving the microwave absorption in Ni-coated fabrics by saccharin addition in plating bath

Positron annihilation lifetime, cation distribution and magnetic features of Ni1−xZnxFe2−xCoxO4 ferrite nanoparticles

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Positron annihilation lifetime, cation distribution and magnetic features of Ni_1−xZn_xFe_2−xCo_xO₄ ferrite nanoparticles