Structural and frequency-dependent dielectric properties of (SnO2)1−x(Fe2O3)x

Saleh, Sherif; Abdel-Latif, I.A.; Hakeem, A.M. Abdel; Ibrahim, E.M.M.

doi:10.1007/s11051-020-4763-3

Cited by 12 publications

(3 citation statements)

References 47 publications

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“…The compactness of the nanoparticles allows for airgap contact with the constituent particles, which increased interfacial polarization and hence complex permittivity. Ferrites are frequently synthesized by co-substitution using multistage chemical methods such as hydrothermal [14], solid state [15], co-precipitation [16], [17], and solgel [18], [19]. Hematite (Fe2O3), a ferrite with distinctive electrical and magnetic properties, is less frequently used for microwave absorption applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Hematite Fe2O3 Nanofiller for Enhanced Dielectric and Microwave-Absorbing Properties in PTFE Composites

Bello Murtala Alhaji,

Raba’ah Syahidah Azi,

Muhammad Kashfi Shabdin

et al. 2024

IJNeaM

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This paper presents the synthesis of hematite Fe2O3 nanofiller from mill scales and its application in polytetrafluoroethylene (PTFE) composites for enhanced dielectric and microwave-absorbing properties. The nanofiller was obtained through 9 hours of high-energy ball milling, resulting in a particle size reduction 43.6 to 11.05 nm. The PTFE/Fe2O3 composites were fabricated by dispersing different concentration of Fe2O3 nanofillers using the dry powder processing technique. The structural and morphological characterization of the nanofiller and PTFE/Fe2O3 composites was carried out using X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. The composites’ microwave absorption properties were analyzed utilizing vector network analyzer (VNA) measurements in the 8–12 GHz frequency range. Based on the findings from the results, as the percentage of filler increased from 5 to 15%wt, the composites' loss tangent and dielectric constant increased from 0.0272 to 0.0478 and 2.12 to 3.25, respectively, while their reduced signal transmission speed was between 2.21 and 2.07 x 108 m/s at 8 GHz and from 2.24 to 2.11 x 108 m/s at 12 GHz. These findings demonstrate that Fe2O3 nanoparticles are a suitable material for developing microwave-absorbing polymer composites within the 8–12 GHz frequency range.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Hematite Fe2O3 Nanofiller for Enhanced Dielectric and Microwave-Absorbing Properties in PTFE Composites

Bello Murtala Alhaji,

Raba’ah Syahidah Azi,

Muhammad Kashfi Shabdin

et al. 2024

IJNeaM

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“…This may allow us to say that the performance of microwave devices is mainly based on the properties of the used materials. Knowledge of the frequency dependence of such material is a prerequisite to select suitable materials for various microwave applications and vice versa [71][72][73]. Novel nanocomposite systems are prepared for microwave applications such as para-toluene sulfonic acid (p-TSA)-doped polyaniline (PANI)-graphene nanoplatelet (GRNP) composite films.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Shielding Effectiveness of M-Type Ba-Co-Ti Hexagonal Ferrite and Composite Materials in Microwave X-Band Systems

Singh¹,

Narang²,

Abdel-Latif³

2021

Composite Materials

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Ferrites are a wide class of materials that are still a very rich field of scientific interest and under the scope of recent research. The polycrystalline Co 2+-T i 4+ substituted Ba hexagonal ferrite has been synthesized by the standard ceramic method. The vector network analyzer has been incorporated to measure different microwave parameters at X-band (8.2-12.4 GHz) frequencies. The microwave shielding effectiveness is evaluated by S-parameters for near field and AC conductivity as well as skin depth for far field. The doping of Co 2+ and Ti 4+ ions causes absorption in composite x = 0.5 to exhibit good shielding effectiveness and it exhibits large 20-dB bandwidth of 4.70 GHz in the near field and 3.60 GHz for far field respectively. The AC conductivity increases with frequency in composites x = 0.1, 0.3, and 0.5 and skin depth decreases with frequency in all composites. The shielding effectiveness, AC conductivity, and skin depth are correlated to each other.

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“…The main aim of this chapter is to propose a novel boundary element formulation for modeling and optimization of three-temperature nonlinear generalized thermoelastic problems of functionally graded anisotropic (FGA) composite microstructures. The proposed boundary element technique has been implemented successfully for solving several engineering, scientific and industrial applications due to its simplicity, efficiency, ease of use, and applicability [72][73][74][75][76][77][78][79][80][81][82][83][84][85]. The numerical results are presented graphically to show the influence of anisotropy and functionally graded materials on the sensitivities of displacements and thermal stresses.…”

Section: Introductionmentioning

confidence: 99%

Composite Materials

2021

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His research interests include engineering tribology, surface engineering, coating technology, polymer and composite materials, metals and alloys, erosive wear of different materials, material fabrication, characterization of materials, self-energy-generating materials, and atomic transfer mechanisms. He is an editorial board member for many international journals of repute. Currently, he is working as an editor and reviewer for many ISI and Scopus indexed international journals and books. He has also published many research and review papers in refereed international journals and conference proceedings. Dr. Chowdhury is a consultant, advisor, and expert member of many government and autonomous organizations. He has twenty years of teaching and research experience. His personal interests involve different cultural and social activities as well as writing articles, stories, lyrics, and poems for different newspapers and relevant media.José Luis Rivera-Armenta has a BSc in Chemical Engineering, an MSc in Petroleum Technology and Petrochemicals, and a Ph.D. in Chemical Engineering, all from the Technological Institute of Madero City (ITCM), Mexico. Since 2003, he has been a fulltime professor in postgraduate programs at ITCM and head of the thermal analysis, injection, and extrusion laboratory. He has been responsible for several research projects sponsored by Consejo Nacional de Ciencia y Tecnología (CONACYT) and the National Technological Institute of Mexico (TecNM). He has advised ten Ph.D., seventeen master's degrees, and five bachelor's degree theses. He has published fifty-five scientific articles, six book chapters, and has edited two books and one special issue journal. Dr. Rivera-Armenta is also an active reviewer for several journals.

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Structural and frequency-dependent dielectric properties of (SnO2)1−x(Fe2O3)x

Cited by 12 publications

References 47 publications

Synthesis and Characterization of Hematite Fe2O3 Nanofiller for Enhanced Dielectric and Microwave-Absorbing Properties in PTFE Composites

Synthesis and Characterization of Hematite Fe2O3 Nanofiller for Enhanced Dielectric and Microwave-Absorbing Properties in PTFE Composites

Investigation of Shielding Effectiveness of M-Type Ba-Co-Ti Hexagonal Ferrite and Composite Materials in Microwave X-Band Systems

Composite Materials

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