Investigation of the microwave absorptive behavior of doped barium ferrites

Ghasemi, Ali; Hossienpour, A.; Morisako, Akimitsu; Liu, Xiaoxi; Ashrafizadeh, Azadeh

doi:10.1016/j.matdes.2006.11.019

Cited by 96 publications

(47 citation statements)

References 23 publications

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“…23 The impedance matching condition is determined by the combinations of six parameters (namely, 3 0 , 3 00 , m 0 , m 00 , f and d). The reection loss curve versus frequency can be calculated from m r and 3 r at an as-designed layer thickness.…”

mentioning

confidence: 99%

Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites

et al. 2015

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mentioning

confidence: 99%

Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites

et al. 2015

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“…In general, radar absorbing materials are divided into two categories, namely, inorganic and organic absorbing materials. Inorganic radar absorbing materials include ironbased absorbing materials (such as polycrystalline iron fibers and carbonyl iron), carbon-based absorbing materials (such as graphite and carbon fiber) and ceramic-based absorbing materials (such as silicon carbide) [7][8][9]. Organic radar absorbing materials are often derived from conductive polymers such as polypyrrole, polyaniline, macromolecule Schiff bases and macromolecule Schiff base salts [10].…”

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confidence: 99%

Skin collagen fiber-based radar absorbing materials

et al. 2011

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By using skin collagen fiber (CF) as raw material, Schiff base structure containing CF (Sa-CF) was synthesized through CF-salicylaldehyde reaction. Then a novel radar absorbing material (Fe-Sa-CF) was prepared by chelating reaction between Sa-CF and Fe 3+. The coaxial transmission and reflection method was used to analyze the complex permittivity and complex magnetic permeability of these CF-based materials, and the radar cross section (RCS) method was used to investigate their radar absorbing properties in the frequency range of 1.0-18.0 GHz. Experimental results indicated that the conductivity of CF increased from initial 1.08×10-11 to 2.86×10 -6 S/cm after being transferred into Fe-Sa-CF, and its dielectric loss tangent (tanδ) in the frequency range of 1.0-17.0 GHz also increased. These facts suggest that the Fe-Sa-CF is electric-loss type radar absorbing material. In the frequency range of 3.0-18.0 GHz, Sa-CF (1.0 mm in thickness) exhibited somewhat radar absorbing property with maximum radar reflection loss (RL) of -4.73 dB. As for Fe-Sa-CF, the absorbing bandwidth was broadened, and the absorbing intensity significantly increased in the frequency range of 1.0-18.0 GHz where a maximum radar RL of -9.23 dB was observed. In addition, the radar absorbing intensity of Fe-Sa-CF can be further improved by increasing membrane thickness. When the thickness reached to 2.0 mm, the RL values of Fe-Sa-CF were -15.0−-18.0 dB in the frequency range of 7.0-18.0 GHz. Consequently, a kind of novel radar absorbing material can be prepared by chemical modification of collagen fiber, which is characterized by thin thickness, low density, broad absorption bandwidth and high absorption intensity. skin collagen fiber, chemical modification, radar absorbing material, reflection loss (RL) Citation:Liu Y S, Huang X, Guo P P, et al. Skin collagen fiber-based radar absorbing materials.

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“…For the composite with 10 wt% graphite nanoplatelets we have observed the wide minimum on RLðfÞ dependence that may be ascribed to both interference of reflected waves and Figure 6. Reflection loss (a) and transmission index (b) for the epoxy composites filled with~27 wt% of ferrite powder S1 (large content of BaM) and carbon nanoparticles at content 5 and 10 wt% manifestation of nature ferromagnetic resonance (NFMR) for the BaM nanoparticles in this frequency range [17]. The absence of electromagnetic radiation absorption peak in filler content in epoxy (CM) 27 wt% BaM-epoxy can evidence random (non-oriented) distribution of hexagonal BaM particles which have easy axis of magnetization.…”

Section: Shielding Properties Of Epoxy Composites With Bam and Carbonmentioning

confidence: 99%

Synthesis and properties of ferrite nanopowders for epoxy‐barium hexaferrite‐nanocarbon composites for microwave applications

Вовченко

Matzui

Brusylovets

et al. 2016

Materialwissenschaft Werkst

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The effect of the synthesis conditions (type of chemical reagents, temperature of treatment) on phase composition and morphology of ferrite nanopowders containing barium hexaferrite was investigated. X-ray diffraction studies confirm the presence of two phases in synthesized powders -Fe 2 O 3 and BaFe 12 O 19 (BaM) -and ratio between these phases depends on the temperature of powder treatment at last stage of the synthesis. Electron microscopy studies showed that prepared ferrite powders consist of hexagonal particles having 20-50 nm thickness and 80-400 nm diameter, with exact values depending on the synthesis parameters. Measurements of magnetic susceptibility in the temperature range 300-850 K as well as the ferromagnetic resonance study confirm the presence of two phases in the prepared ferrite powders and correlate with the X-ray diffraction data. It was found that the addition of conductive carbon nanotubes or graphite nanoplatelets into the hybrid epoxybarium hexaferrite composites allows to control the parts of absorbed and reflected microwave electromagnetic radiation in these composites.Keywords: Barium hexaferrite / magnetic susceptibility / nanocarbon filler / electromagnetic shielding / dielectric permittivity Schlüsselwörter: Bariumhexaferrit / magnetische Suszeptibilität / Nano-Kohlenstoff Füllstoff / elektromagnetische Abschirmung / dielektrische Permittivität

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Investigation of the microwave absorptive behavior of doped barium ferrites

Cited by 96 publications

References 23 publications

Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites

Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites

Skin collagen fiber-based radar absorbing materials

Synthesis and properties of ferrite nanopowders for epoxy‐barium hexaferrite‐nanocarbon composites for microwave applications

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Investigation of the microwave absorptive behavior of doped barium ferrites

Cited by 96 publications

References 23 publications

Preparation and microwave-absorbing property of BaFe12O19 nanoparticles and BaFe12O19/Fe3C/CNTs composites

Preparation and microwave-absorbing property of BaFe12O19 nanoparticles and BaFe12O19/Fe3C/CNTs composites

Skin collagen fiber-based radar absorbing materials

Synthesis and properties of ferrite nanopowders for epoxy‐barium hexaferrite‐nanocarbon composites for microwave applications

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Product

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Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites

Preparation and microwave-absorbing property of BaFe₁₂O₁₉ nanoparticles and BaFe₁₂O₁₉/Fe₃C/CNTs composites