Magnetic and Microwave Absorption Properties of Ni x Zn0.9−x Mn0.1Fe2 O 4 Prepared by Boron Addition

Genç, F.; Turhan, Enis; Kavas, H.; Topal, Uğur; Baykal, A.; Sözeri, H.

doi:10.1007/s10948-014-2670-5

Cited by 10 publications

(4 citation statements)

References 6 publications

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“…Table 1 summarizes the electromagnetic wave absorption performances between (ZCFO/MNFO)@C-MWCNTs and related hybrids reported in other literature [65,66,67,68,69,70,71,72,73,74,75]. It is clear that the electromagnetic absorption band of most hybrids are located in the relatively high frequency range.…”

Section: Resultsmentioning

confidence: 96%

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Yin

Zhang

et al. 2019

Nanomaterials

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In this study, the quaternary hybrid of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs with high-performance in low frequency electromagnetic absorption was synthesized via a facile two-step solvothermal synthesis method. The physicochemical properties as well as electromagnetic parameters and microwave absorption performance were characterized by XRD, SEM, TEM, RS, TGA, and VNA, respectively. The results indicate a nuclear-shell morphology of this hybrid for amorphous carbon coated on the surface of Zn0.5Co0.5Fe2O4 and Mn0.5Ni0.5Fe2O4 mixed polycrystalline ferrites. In addition, the MWCNTs synchronously enwind in the nuclear-shell NPs to form a special cross-linking structure. The outstanding low frequency microwave absorption property is attributed to the synergistic effect of dielectric and magnetic loss, better impedance matching condition, and excellent attenuation characteristics of the as-prepared paramagnetic quaternary hybrid. Maximum RL of −35.14 dB at 0.56 GHz with an effective absorption bandwidth in the range of 0.27–1.01 GHz can be obtained with thickness of 5 mm. This hybrid exhibits superior low frequency microwave absorption properties compared with other ferrite-carbon nanocomposites. This investigation provides a new route to prepare suitable candidates for the absorption of electromagnetic waves in a low frequency band on account of its good performance and simple preparation process.

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Section: Resultsmentioning

confidence: 96%

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Yin

Zhang

et al. 2019

Nanomaterials

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“…The Co-doped barium hexaferrite (BaFe 11 CoO 19 ) is chemically composed of BaCO 3 , Fe 2 O 3 , and CoO (all at 99.999 % purity). In order to increase the crystal growth at lower temperatures 1 % boron (B 2 O 3 ) was added [15]. It was synthesized using conventional mechanical powder processing techniques for ceramic materials.…”

Section: Sample Preparationmentioning

confidence: 99%

The measurement of shielding effectiveness for small-in-size ferrite-based flat materials

Araz¹

2018

Turk J Elec Eng & Comp Sci

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This work presents the results of our studies on the electromagnetic interference shielding effectiveness of small-in-size samples of ferrite composition microwave absorber prepared by using the ceramic method. The shielding effectiveness measurement was performed using the complex intrinsic parameters of the material. The coaxial holder method with the well-known test technique based on transmission/reflection measurements was used in the experimental setup. Complex intrinsic parameters were measured in the frequency range of 2-18 GHz by using the Nicholson-Ross-Weir (NRW) method with an automated test setup. First, the shielding effectiveness was measured by conventional test method and then it was calculated using complex intrinsic parameters with the NRW method. Comparison was made between measured and calculated SEs. By using a new method the SE was determined as a function of the complex intrinsic parameters of materials ϵ , µ , and frequency. This method is preferred in order to provide higher accuracy in determining material electromagnetic shielding effectiveness for small-in-size materials. For the first time, the shielding effectiveness of small-sized samples has been measured in the frequency range between 2 and 18 GHz by using the NRW method.

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“…Due to the rapid oxidation of Fe 3 O 4 into γ-Fe 2 O 3 in air as well as its decreased magnetization, large numbers of studies have focused on improving the saturation magnetization and chemical stability of the magnetic nanomaterials for effective heavy metal ion adsorption [10,19,[24][25][26][27][28][29]. Two research directions are being considered: (i) partial replacement of divalent metal ions for Fe 2+ ions, and (ii) coating of magnetic nanoparticles by polymers.…”

Section: Introductionmentioning

confidence: 99%

Role of Zn And Polyaniline In Magnetic Nanocomposites And Enhanced Arsenic Adsorption Capacity In Wastewater

Thi¹,

Lam

Tung

et al. 2021

Preprint

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Polyaniline/Fe0.90Zn0.10Fe2O4 (PANI/Zn0.10Fe2.90O4) nanocomposites were synthesized by a chemical method and an onsite polymerization method. XRD patterns showed that the Zn0.10Fe2.90O4 grain size about 12 nm, while TEM image showed grain size from 10 to 20 nm. The results of Raman spectra and DTA analyses showed that PANI participated in part of the PANI/Zn0.10Fe2.90O4 nanocomposite samples. The grain size of PANI/Zn0.10Fe2.90O4 samples measured by SEM was about 35–50 nm. These results demonstrated the shell–core structures of the nanocomposite material. The magnetization measurements at room temperature showed that in 1250 Oe magnetic field, the saturation magnetic moment of PANI/Zn0.10Fe2.90O4 samples decreased from 71.2 to 42.3 emu/g when the PANI concentration increased from 0 % to 15 %. The surface area and porous structure of nanoparticles were investigated by the BET method at 77 K and a relative pressure P/P0 of about 1. The arsenic adsorption capacity of the PANI/Zn0.10Fe2.90O4 sample with the PANI concentration of 5 % was better than that of Fe3O4 and Zn0.10Fe2.90O4 in a solution of pH 7. In the solution with pH P14, the arsenic adsorption of magnetic nanoparticles was insignificant. Due to substitution of Fe ions by Zn transition metal and coating polyaniline, these materials could be reabsorbed and reused.

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Magnetic and Microwave Absorption Properties of Ni x Zn0.9−x Mn0.1Fe2 O 4 Prepared by Boron Addition

Cited by 10 publications

References 6 publications

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

Two-Step Solvothermal Synthesis of (Zn0.5Co0.5Fe2O4/Mn0.5Ni0.5Fe2O4)@C-MWCNTs Hybrid with Enhanced Low Frequency Microwave Absorbing Performance

The measurement of shielding effectiveness for small-in-size ferrite-based flat materials

Role of Zn And Polyaniline In Magnetic Nanocomposites And Enhanced Arsenic Adsorption Capacity In Wastewater

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