Radar Absorption Performance of Fe3O4/AC/PANI Nanocomposites Prepared from Natural Iron Sand

Taufiq, Ahmad; Sutiami, Rita; Subadra, St. Ulfawanti Intan; Hidayat, Arif; Diantoro, Markus; Sunaryono, Sunaryono; Hidayat, Nurul; Adi, Wisnu Ari

doi:10.5829/ije.2020.33.02b.15

Cited by 3 publications

(3 citation statements)

References 40 publications

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“…According to equation (18), it can be seen that the eddy current loss depends on the particle diameter (d) and electrical conductivity (σ). μ0 is the magnetic permeability constant in a vacuum [42].…”

Section: Microwave Absorption Properties Of the Prepared Materialsmentioning

confidence: 99%

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Facile and low-cost fabrication of Fe3O4@CNTs nanocomposites for effective absorption of electromagnetic waves with high efficiency

Heydari,

Afghahi,

Gholizadeh

et al. 2023

Preprint

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In this paper, Fe3O4 nanoparticles (NPs) and nanocomposites of Fe3O4 NPs and functionalized carbon nanotubes (CNTs) under different weight ratios have been made for use in electromagnetic waves (EMW) absorbers in the frequency range of 18-8GHz. Therefore, their structural, magnetic, and dielectric properties were investigated. At first, iron oxide NPs with the chemical formula Fe3O4 were successfully synthesized by the nitrate-citrate method. Then ,CNTs are combined with Fe3O4 NPs under different weight ratios until the desired nanocomposite is formed. After determining the crystal structure of the samples by X-ray diffraction (XRD), Surface morphology and elemental analysis by scanning electron microscope (FESEM) and energy dispersive spectrum attached to it (EDS), Fourier transform infrared spectroscopy (FT-IR), Determining the magnetic properties using a vibrating sample magnetometer (VSM), And checking the dielectric properties of all the samples were done by vector network analyzer (VNA) at room temperature. Fe3O4 NPs /carbon nanotubes (Fe3O4/CNTs) nanocomposites were prepared in six different weight ratios and fully characterized. That among the examples, Sample NC3 under thickness d = 2.25 mm had the best loss in the X frequency band, which came − 27.07 dB. Also, sample NC4 under thickness d = 5.00 mm had the best loss in the Ku frequency band, which came − 38.21 dB.

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Section: Microwave Absorption Properties Of the Prepared Materialsmentioning

confidence: 99%

“…Also, the optical properties of Fe3O4/AC/PANI nanocomposites have been shown by increasing the energy gap and decreasing the absorption wavelength. Interestingly, the improving in the weight ratio of carbon causes the adsorption of Fe3O4/AC/PANI nanocomposites [18].…”

Section: Introductionmentioning

confidence: 99%

Facile and low-cost fabrication of Fe3O4@CNTs nanocomposites for effective absorption of electromagnetic waves with high efficiency

Heydari,

Afghahi,

Gholizadeh

et al. 2023

Preprint

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show abstract

“…Nanotechnology played an important role in various applications, especially the huge systems like nuclear reactors in their cooling [75,76]. Recently modern military radars applied nanotechnology in the cooling system of the radar, and found that the efficiency of the waste heat recovery heat exchanger increased for nanofluids, that huge among of heat can be calcified as pollution, therefore, many researchers and environmental activists trying to reduce and minimize thermal pollution and recover the energy waste [77][78][79].…”

Section: Applications Of Nanofluidsmentioning

confidence: 99%

Numerical and Experimental Studies of the Nanofluid Characteristics that Effects on Heat Transfer Enhancement: Review and Comparison

Hashim Alsammarraie,

Mohd Khairol Anuar Mohd Ariffin,

Eris Elianddy Supeni

et al. 2023

ARFMTS

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This review describes and compare the recent studies for numerical and experimental researches in the improvement of Nanofluid on flow, thermal conductivity, and heat transfer for various heat exchanger applications. The Nanofluid consists of two parts which are nanoparticles and base fluid. This study investigated nanoparticles' and base fluid's effects separately—the main preparation techniques and latest heat exchanger applications that used nanofluid technology, which has been touched upon. Nanofluid technology is one of the hot topics and high Impact that researchers have worked on in the latest decades. Therefore, this review paper investigated and collected the data from the latest results in this area based on nanofluid characteristics and effects of particle material, volume concentration, particle size, particle shape, fluid temperature, acidity, magnetic field, and electrical pulsing individually. Many recent studies were recast using a common parameter to settle comparisons of data between the research group in the same study and conditions to identify its thermal enhancement. The latest trends of nanofluid technology have been stated in this research alongside the recommendations for future studies that present the leaks in each area of study. Heat transfer enhancement has been increased in different nanofluids, metallic, non-metallic, organic, inorganic and hybrid, by up to 300%.

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The performance of radar absorption of MnxFe3–xO4/rGO nanocomposites prepared from iron sand beach and coconut shell waste

Prakasa¹,

Sumari²,

Santoso³

et al. 2023

AIMSMATES

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<abstract> In this work, the Fe3O4 nanoparticles from natural iron sand were doped with Mn and combined with reduced-graphene oxide (rGO) to obtain MnxFe3–xO4/rGO nanocomposites with mole fraction variations of the Mn of 0.25, 0.5, and 0.75. The crystalline phase of the synthesized MnxFe3–xO4/rGO nanocomposites formed an amorphous phase. The presence of rGO was observed through EDX results. The magnetical properties of MnxFe3–xO4/rGO nanocomposites were shown by decreasing the Br, HcJ, Hmax along with increasing of Mn doping. Interestingly, increasing rGO and Mn composition made the absorption bandwidth of the MnxFe3–xO4/rGO nanocomposites wider, so that the radar absorption also increased marking by the greater reflection loss that reached −11.95 dB. The increase in the radar absorption performance of MnxFe3–xO4/rGO nanocomposites came from the efficient complementarity between dielectric loss and magnetic loss and interfacial polarization between Fe3O4 doped Mn and rGO. </abstract>

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Radar Absorption Performance of Fe3O4/AC/PANI Nanocomposites Prepared from Natural Iron Sand

Cited by 3 publications

References 40 publications

Facile and low-cost fabrication of Fe3O4@CNTs nanocomposites for effective absorption of electromagnetic waves with high efficiency

Facile and low-cost fabrication of Fe3O4@CNTs nanocomposites for effective absorption of electromagnetic waves with high efficiency

Numerical and Experimental Studies of the Nanofluid Characteristics that Effects on Heat Transfer Enhancement: Review and Comparison

The performance of radar absorption of Mn<sub>x</sub>Fe<sub>3–x</sub>O<sub>4</sub>/rGO nanocomposites prepared from iron sand beach and coconut shell waste

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