Fabrication and microwave absorbing properties of Ni–Zn spinel ferrites

Zhao, Dongyuan; Lv, Qiang; Zeng-min, Shen

doi:10.1016/j.jallcom.2009.01.130

Cited by 184 publications

(83 citation statements)

References 45 publications

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“…EM functionalized conducting polymer composites with micro/nanostructures are considered good candidate materials for EM wave absorption because their microwave properties can be improved by both magnetic and dielectric losses, which are expected to lead to microwave absorption over a broad range of frequencies [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

et al. 2012

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Hollow poly(aniline-co-pyrrole)-Fe 3 O 4 (HPAP-Fe 3 O 4 ) nanospheres with significant electromagnetic properties were successfully prepared via the oxidative polymerization of a mixture of aniline and pyrrole in the presence of a magnetic fluid, using a non-ionic surfactant as a template.The products were characterized by field emission scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray powder diffraction, thermogravimetric analysis and X-ray photoelectron spectroscopy. The electromagnetic (EM) and microwave absorbing properties of the nanocomposites were also investigated. The HPAP-Fe 3 O 4 nanospheres exhibit superparamagnetic properties, and the conductivity increases with Fe 3 O 4 content. The reflection loss evaluation based on the absorbing wall theory at 2 mm thickness shows that the reflection loss is reinforced in the frequency range of 0.5-10 GHz by the presence of Fe 3 O 4 nanoparticles, and the frequency of minimum reflection loss shifts to a higher value with increasing Fe 3 O 4 content. HPAP-Fe 06 exhibits the best microwave absorbing property between 0.5 and 10GHz.

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Section: Introductionmentioning

confidence: 99%

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

et al. 2012

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“…sample) up to 18 GHz, the cut off frequency, dictated by the hopping frequency of electrons within the semiconducting ferrite grains. 10,11 Thus by moving from sintered to composite ferrimagnetic materials, it is possible to obtain non-dispersive high permittivity values over a greater frequency range.…”

confidence: 99%

Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths

et al. 2013

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A cold-pressing technique has been developed for fabricating composites composed of a polytetrafluoroethylene-polymer matrix and a wide range of volume-fractions of MnZn-ferrite filler (0%–80%). The electromagnetic properties at centimetre wavelengths of all prepared composites exhibited good reproducibility, with the most heavily loaded composites possessing simultaneously high permittivity (180 ± 10) and permeability (23 ± 2). The natural logarithm of both the relative complex permittivity and permeability shows an approximately linear dependence with the volume fraction of ferrite. Thus, this simple method allows for the manufacture of bespoke materials required in the design and construction of devices based on the principles of transformation optics

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“…Among magnetic nanoparticles, manganese ferrites MnFe 2 O 4 is a group of soft spinel ferrite materials with high magnetic permeability, high chemical stability, high electrical resistance, and special optical. Manganese ferrites are widely used in many areas such as high-density magnetic recording, ferrofluid technology, electronic devices, magnetic resonance imaging (MRI), microwave adsorption, biomedical drug delivery, catalysis and environmental analysis [13][14][15] . Besides that, this ferrite has moderate saturation magnetization at 300 K (Ms about 83 emu/g) and low Curie temperature (Tc about 580 K) 16 in all formulations could be used to completely degrade the dye under sunlight irradiation and the sample could be separated from the liquid by external magnetic field and used for the subsequence photocatalytic process.…”

Section: Introductionmentioning

confidence: 99%

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

Rahmayeni¹,

Arief²,

Jamarun³

et al. 2017

Orient. J. Chem

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Magnetically separable ZnO-MnFe 2 O 4 nanocomposites were synthesized in organic-free media. The samples were characterized by several techniques. The photocatalytic activities of the nanocomposites were tested by degradation of Rhodamine B and wastewater of batik dye under natural sunlight irradiation. X-ray diffraction (XRD) pattern of composites is well in agreement with the standard of the hexagonal wurtzite phase of ZnO and spinel cubic phase of MnFe 2 O 4 . Scanning Electron Microscope (SEM) image illustrates the morphology of the nanocomposites are square plate-like and porous. The magnetic properties of composites were characterized by Vibrating Sample Magnetometer (VSM) show the superparamagnetic properties of all nanocomposites. Optical properties study indicated that addition of MnFe 2 O 4 to ZnO decreases the band gap. The removal of Rhodamine B (10 mg L −1 ) and wastewater of batik dye solution by ZnO-MnFe 2 O 4 (1:0.1) composite after 3 h reached 96.7% and 95.1 %.

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Fabrication and microwave absorbing properties of Ni–Zn spinel ferrites

Cited by 184 publications

References 45 publications

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths

Magnetically Separable ZnO-MnFe2O4 Nanocomposites Synthesized in organic-free Media for dye Degradation Under Natural Sunlight

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