The microstructure and magnetic behavior of spark plasma sintered iron/nickel zinc ferrite nanocomposite synthesized by the complex sol-gel method

Ghasemi, Ali; Loghman-Estarki, Mohammad Reza; Torkian, Shahab; Tavoosi, M.

doi:10.1016/j.compositesb.2019.107179

Cited by 43 publications

(4 citation statements)

References 29 publications

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“…In the FTIR spectrum of the N 0.8 Z 0.2 F, the peak at 590 cm −1 is attributed to the stretching vibration of FeO, NiO, and ZnO bonds. [ 31 ] When N 0.8 Z 0.2 F/PANI was fabricated by the in‐situ growing of PANI, it has similar FTIR characteristic peaks to PANI. The peaks at 1145, 1240, 1310, 1493, and 1584 cm −1 were caused by the absorbance of the stretching vibration of NQN and CN, the bending vibration of NH, the stretching vibration of CC (benzene), CC (quinone).…”

Section: Resultsmentioning

confidence: 99%

Porous nickel–zinc ferrite/polyaniline/polyimide composite based on improved impedance matching for electromagnetic microwave absorption

Sun

Zhang

et al. 2022

Polymer Composites

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Excellent impedance matching plays a crucial role in the design of absorbers to tackle the growing problem of electromagnetism pollution. Here, a porous nickel-zinc ferrite/polyaniline/polyimide (Ni Zn Fe 3 O 4 /PANI/PI) composite was prepared by in-situ polymerization and thermally assisted non-solventinduced phase separation (TNIPS). The impedance matching of porous Ni Zn Fe 3 O 4 /PANI/PI composite can be improved by controlling the composition ratio of Ni Zn Fe 3 O 4 /PANI absorbing filler. When the absorbing filler satisfied a molar ratio of 8:2 for Ni to Zn and a mass ratio of 2:8 for PANI to Ni Zn Fe 3 O 4 , the porous Ni Zn Fe 3 O 4 /PANI/PI composite with 20% absorbing filler content displayed the minimum reflection loss of À30.01 dB, effective absorption bandwidth of 4.05 GHz (6.91-10.96 GHz), and the impedance matching (Z) value almost equal to 1 at 9.36 GHz. In addition, the initial thermal decomposition temperature (T 5 %) of porous Ni Zn Fe 3 O 4 /PANI/PI composite beyond 544 C in nitrogen, demonstrates superior thermal stability properties. The porous Ni Zn Fe 3 O 4 /PANI/PI composite in this research has great application potential in electromagnetic wave absorption at hightemperature environment.

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Section: Resultsmentioning

confidence: 99%

Porous nickel–zinc ferrite/polyaniline/polyimide composite based on improved impedance matching for electromagnetic microwave absorption

Sun

Zhang

et al. 2022

Polymer Composites

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“…According to the XRD results, D increases with raising temperature, resulting in decreasing Hc. In general, the changes in Ms and Hc accords with their inversely proportional relationship 49,50 .…”

Section: Resultsmentioning

confidence: 67%

Temperature tailored magneto-dielectric properties of Cd-substituting Mg-based ferrite ceramics for miniaturized VHF antennas

Gan

2023

Sixth International Conference on Intelligent Computing, Communication, and Devices (ICCD 2023)

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The microstructure formation and structural regulation of Mg-Cd ferrites (Cd0.15Mg0.85Fe2O4) with 5% Bi2O3 addition at different sintering temperatures (880, 900, 920, and 940 °C) werer invsetigated for application in VHF antennas. The changes including microstructure, phase composition, magnetic and dielectric properties were mainly characterized. It was found that increasing temperature resulted in superior microstructure with accrescent grain size and denser arrangement. XRD patterns revealed normal spinel phase and a secondary phase of Bi compound. Meanwhile, a reinforcement of the magnetization including increased saturation magnetization (from 37.8 to 46.6 emu/g) and dropped coercivity (from 98.2 to 65.9 Oe) were obtained through hysteresis loops. A slight increment of μ' and ' were measured over a broad frequency range in VHF bands. Therefore, excellent magneto-dielectric properties of the proposed ferrites were obtained. In addition, low magnetic losses (tan δμ ~10 -2) and dielectric losses (tan δμ ~10 -3) indicating low power loss in operation. It is foreseeable that these properties of the proposed ferrites would behave well in miniaturized VHF antennas.

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“…Different researches was illustrated that two general methods (top-down, and bottom-up) can be applied for synthesizing various nanoparticles. [17,18] Until now, various approaches such as vapor phase deposition (VPD), [19] atomic layer deposition (ALD), [20] sol-gel plasma, [21] hydrothermal treatment, [22] and microwave irradiation [23] were selected for synthesizing different nanoparticles. It should be noted that each method has its own advantages and disadvantages.…”

Section: Introductionmentioning

confidence: 99%

The green synthesis of highly fluorescent carbon quantum dots through microwave heating using honey for optical detection of Ibuprofen.

Gholipour,

Hosseini

2023

Preprint

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In the current research, a green strategy to synthesis carbon quantum dots (CQDs) with a quantum yield (QY) of nearly 19% has been successfully established. Subsequently, the different features of as-prepared CQDs was evaluated by detailed analyses including high resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and photoluminescence (PL) spectra. The different analyses proved that the CQDs obtained here had various advantages such as quasi-spherical shape, different functional groups, and great optical features. Additionally, the as-synthesized CQDs were employed for optical detection of Ibuprofen based on the interactions between Ibuprofen and diverse functional groups such as -OH, C-H, and N-H that existed on the surface of CQDs, resulting in aggregations that facilitate to quench the fluorescence (FL) of CQDs. Furthermore, the results indicated that the as-prepared CQDs can detect Ibuprofen in a linear range of 0 to 100 µM with a limit of detection (LOD) of 1.18 µM (signal to noise ratio of 3).

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The microstructure and magnetic behavior of spark plasma sintered iron/nickel zinc ferrite nanocomposite synthesized by the complex sol-gel method

Cited by 43 publications

References 29 publications

Porous nickel–zinc ferrite/polyaniline/polyimide composite based on improved impedance matching for electromagnetic microwave absorption

Porous nickel–zinc ferrite/polyaniline/polyimide composite based on improved impedance matching for electromagnetic microwave absorption

Temperature tailored magneto-dielectric properties of Cd-substituting Mg-based ferrite ceramics for miniaturized VHF antennas

The green synthesis of highly fluorescent carbon quantum dots through microwave heating using honey for optical detection of Ibuprofen.

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