Lanthanum and Neodymium Doped Barium Ferrite-TiO2/MCNTs/poly(3-methyl thiophene) Composites with Nest Structures: Preparation, Characterization and Electromagnetic Microwave Absorption Properties

Zhao, Jie; Yu, Jian; Xie, Yu; Zhang, Le; Hong, Xiaowei; Ci, Suqin; Chen, Junhong; Qing, Xiaoyan; Xie, Wei; Wen, Zhen-Hai

doi:10.1038/srep20496

Cited by 46 publications

(25 citation statements)

References 38 publications

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“…To create identical functionality by oxidative treatment, around 1 g as‐received MWCNT was ultrasonicated in a mixture of concentrated H 2 SO 4 and HNO 3 (3:1 ratio) for 2 h as reported in literature . After that, the mixture was refluxed in a triple‐neck flask (volume 1.0 L), equipped with an external heater, control thermocouple, magnetic stirrer, and condenser under vigorous stirring at 80°C for 60 minutes.…”

Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of hybrid PANI/MWCNT nanocomposites for EMI applications

Kumar

et al. 2017

Polymer Composites

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The present study reports on a simple and very efficient solution mixing method for the preparation of functionalized multiwalled carbon nanotube/polyaniline nanocomposites (f‐MWCNT/PANI) for electromagnetic interference (EMI) application. The synthesized composites have been characterized by different physiochemical techniques such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffractometry (XRD), and Fourier transform infrared (FT‐IR) spectroscopy. The electron microscopy analysis of nanocomposites reveals the good dispersion and agglomeration of CNT in PANI matrix at higher concentration. X‐ray study shows the higher crystallinity of PANI with the addition of f‐MWCNT. FTIR spectroscopy has confirmed the interactions of the carbonyl group of f‐MWCNT with the quinoid ring of PANI. The resulting f‐MWCNT/PANI nanocomposites (0 to 21 vol% CNT) shows higher electrical conductivity than that of pure PANI due to the formation of conducting path between CNT and PANI matrix. The increased electrical conductivity of nanocomposites also improved the estimated EMI shielding. The percolation threshold was found to occurs at 0.1 vol% of f‐MWCNT, where the DC electrical conductivity started to increase abruptly. The one‐order increment in electrical conductivity was observed which is 12 times more than that of pure PANI. The DC electrical conductivity of nanocomposite at 3.3 vol% and 13.9 vol% of f‐MWCNT was 1.6 × 10−1 S/cm and 1.8 × 10−1 S/cm, respectively. In addition, the estimated EMI shielding of nanocomposites at 3.3 vol% of f‐MWCNT and beyond it was found to be 12dB. POLYM. COMPOS., 39:3858–3868, 2018. © 2017 Society of Plastics Engineers

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Section: Methodsmentioning

confidence: 99%

Synthesis and characterization of hybrid PANI/MWCNT nanocomposites for EMI applications

Kumar

et al. 2017

Polymer Composites

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“…[6][7][8] To achieve such ideal goal, the electromagnetic wave consumed by dielectric loss, magnetic loss and other energy loss mechanisms should be further enhanced. 9,10 Several categories of dielectric materials, such as graphene, [11][12][13][14] carbon nanotubes (CNTs), [15][16][17][18][19] and conducting polymers 20,21 can be considered as an excellent absorption material for the sake of large dielectric loss tangent. Specifically, Fe-Ni alloy, 1,[22][23][24] TiO 2 -Fe nanocomposites, 25 and Fe 3 O 4 9,26 have been widely investigated to enhance the magnitude of absorption performance because of their high magnetic loss tangent.…”

Section: Introductionmentioning

confidence: 99%

Enhanced electromagnetic wave absorption of Fe‐doped silicon oxycarbide nanocomposites

Qian

et al. 2019

J Am Ceram Soc

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Polymer‐derived ceramics (PDCs), such as SiOC, SiCN, SiBCN, and SiC are considered the best candidates for designing high‐performance microwave absorber due to their controllable structure, homogeneous element composition at atom level, tunable electromagnetic and electrochemical properties. Herein, Fe ions doped silicon oxycarbide (Fe ions‐SiOC) ceramics have been successfully fabricated via solvothermal method. The electromagnetic absorption performances of the nanocomposites prove to be controllable via tailoring Fe ion contents. The Fe ions effectively enhance both the interfacial polarization of amorphous SiOC, and the dielectric properties of the nanocomposites but barely effect magnetic properties of the nanocomposite. As for 0.16 mol/L‐SiOC ceramics annealed at 1450°C, the effective absorption bandwidth as high as 2.00 GHz and reflection loss of −59.60 dB at 5.40 GHz with the thickness of 4.55 mm are obtained. Such work opens up a novel and simple route to scale up the PDC‐based materials with broadband and excellent microwave absorbing performances.

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“…There are continuous efforts to achieve the enhanced wide band MW absorption properties by converting the materials in different geometries viz. ferrite nanofibers11, porous hollow microrods12, nested structure13 etc. Further, among these, ferrite materials provide several advantages such as relatively smaller values of absorber thickness, particularly for lower frequencies in the MW region, tunability of ferromagnetic resonance (FMR)14, excellent environmental stability, etc.…”

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confidence: 99%

Tunable Twin Matching Frequency (fm1/fm2) Behavior of Ni1−xZnxFe2O4/NBR Composites over 2–12.4 GHz: A Strategic Material System for Stealth Applications

Saini

Patra

Jani

et al. 2017

Sci Rep

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The gel to carbonate precipitate route has been used for the synthesis of Ni1−xZnxFe2O4 (x = 0, 0.25, 0.5 and 0.75) bulk inverse spinel ferrite powder samples. The optimal zinc (50%) substitution has shown the maximum saturation magnetic moment and resulted into the maximum magnetic loss tangent (tanδm) > −1.2 over the entire 2–10 GHz frequency range with an optimum value ~−1.75 at 6 GHz. Ni0.5Zn0.5Fe2O4- Acrylo-Nitrile Butadiene Rubber (NBR) composite samples are prepared at different weight percentage (wt%) of ferrite loading fractions in rubber for microwave absorption evaluation. The 80 wt% loaded Ni0.5Zn0.5Fe2O4/NBR composite (FMAR80) sample has shown two reflection loss (RL) peaks at 5 and 10 GHz. Interestingly, a single peak at 10 GHz for 3.25 mm thickness, can be scaled down to 5 GHz by increasing the thickness up to 4.6 mm. The onset of such twin matching frequencies in FMAR80 composite sample is attributed to the spin resonance relaxation at ~5 GHz (fm1) and destructive interference at λm/4 matched thickness near ~10 GHz (fm2) in these composite systems. These studies suggest the potential of tuning the twin frequencies in Ni0.5Zn0.5Fe2O4/NBR composite samples for possible microwave absorption applications.

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Lanthanum and Neodymium Doped Barium Ferrite-TiO2/MCNTs/poly(3-methyl thiophene) Composites with Nest Structures: Preparation, Characterization and Electromagnetic Microwave Absorption Properties

Cited by 46 publications

References 38 publications

Synthesis and characterization of hybrid PANI/MWCNT nanocomposites for EMI applications

Synthesis and characterization of hybrid PANI/MWCNT nanocomposites for EMI applications

Enhanced electromagnetic wave absorption of Fe‐doped silicon oxycarbide nanocomposites

Tunable Twin Matching Frequency (fm1/fm2) Behavior of Ni1−xZnxFe2O4/NBR Composites over 2–12.4 GHz: A Strategic Material System for Stealth Applications

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