The Ability of ZnFe&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt; Nanostructure as Electromagnetic Wave Absorber in Frequency Range 2-18 GHz

Izaak, Maya Puspitasari; Gunanto, Yohanes Edi; Sitompul, Henni; Sarwanto, Yosef; Adi, Wisnu Ari

doi:10.4028/p-20h232

Cited by 2 publications

(2 citation statements)

References 37 publications

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“…The appropriate permeability properties can work optimally at certain working frequencies so that the magnetization process will occur to dissipate the EM energy. For the range of 1–10 GHz, only a few studies reported the corresponding permeability related to this study. − The effective permeability for frequencies 5 ≥ 7 ≤ 10 GHz is determined to be 2.4 ≥ 2.6 ≤ 2.9. In addition to the permeability properties, the conductive properties of materials also affect the performance of MAMs.…”

Section: Resultsmentioning

confidence: 88%

“…For the range of 1–10 GHz, only a few studies reported the corresponding permeability related to this study. 93 − 95 The effective permeability for frequencies 5 ≥ 7 ≤ 10 GHz is determined to be 2.4 ≥ 2.6 ≤ 2.9. In addition to the permeability properties, the conductive properties of materials also affect the performance of MAMs.…”

Section: Resultsmentioning

confidence: 99%

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Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

et al. 2023

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Efforts to produce microwave absorber materials that are inexpensive and environmentally friendly have become a means of greening the environment. The breakthrough can be focused on industrial waste and natural materials for functional purposes and how to enhance their performance. We successfully synthesized nickel slag/laterite soil (NS/LS) and nickel slag/iron sand (NS/IS) nanocomposites using a simple mechanical alloying technique, and the electromagnetic (EM) wave absorption capacities of the nanocomposites were measured using a vector network analyzer. The structural properties of the nanocomposites were analyzed by X-ray diffraction spectroscopy, where the results of the analysis showed that NS/IS has the largest crystallite size (15.69 nm) and the highest EM wave absorption performance. The optical properties of the nanocomposites were determined from their Fourier transform infrared spectra using the Kramers–Kronig relation. As determined through a quantitative analysis of the optical properties, the distance between the longitudinal and transversal optical phonon wavenumber positions (Δ(LO – TO) = 65 cm–1) is inversely proportional to the reflection loss. The surface morphologies of the nanocomposites were analyzed by scanning electron microscopy, and the particle diameters were observed by binary image and Gaussian distribution analyses. The nanocomposite surface exhibits a graded-like morphology, which indicates multiple reflections of the EM radiation, consequently reducing the EM interference. The best nanocomposite for an attenuated EM wave achieved a reflection loss of −39.14 dB at 5–8 GHz. A low penetration depth has implications for the electrical charge tuning of the storage and composite magnets. Finally, the EM absorption properties of NS/IS and NS/LS indicate a 2-mm-thick environmentally friendly nanocomposite for EM absorption.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

et al. 2023

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Synthesis and characterization of PANI-CZF nanocomposites for enhanced electromagnetic interference shielding

Harisha,

Rangaswamy,

Thejas

et al. 2024

J Mater Sci: Mater Electron

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The Zn0.5Cu0.5Fe2O4 nano ferrites were prepared by the solution combustion method using aloe vera gel. The polyaniline-Zn0.5Cu0.5Fe2O4 nano ferrite composites were prepared by Ex-situ polymerization method with different weight percentage ratio. The prepared samples were examined by X-Ray diffraction, SEM, EDAX, BET, TEM, VSM and Impedance analyser to investigate their structural, morphological, elemental analysis, average pore size and the porosity, magnetic, and dielectric properties, respectively. The cubic spinel structure was confirmed by X-ray diffraction patterns. Addition of PANI to zinc-copper nano ferrite exhibits shift in crystalline peaks towards larger angle. The existence of spherical and clumped particles was revealed by SEM examination. The retentivity and coercivity are determined and the magnetic moment values were decreases with increase in PANI to the ferrite nanocomposites. The ac conductivity constant at lower frequency and there is a sudden increase and decrease in its value as a function of frequency shows resonance behaviour. The CZF-1 (CZF 30%) composite shows highest ac conductivity and dielectric constant. The electromagnetic shielding interference studies were conducted for S-band frequency. The CZF-1 (CZF 30%) nano composite shows highest shielding effectiveness as compared to other composite in the frequency range 2 to 3 GHz. The experimental result showed that these materials are used for applications in electromagnetic interference shielding.

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The Ability of ZnFe<sub>2</sub>O<sub>4</sub> Nanostructure as Electromagnetic Wave Absorber in Frequency Range 2-18 GHz

Cited by 2 publications

References 37 publications

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties

Synthesis and characterization of PANI-CZF nanocomposites for enhanced electromagnetic interference shielding

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