The Effects of Doping on Crystal Structure, Magnetic and Microwave Properties of SrFe12−2x La x (Mn0.5Zr0.5) x O19 Nanoparticles

Kiani, Esmail; Rozatian, A. S. H.; Yousefi, Mohammad

doi:10.1007/s10948-012-1809-5

Cited by 9 publications

(2 citation statements)

References 12 publications

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“…The increase of CX concentration (15 wt.%) associated with the addition of CNT promoted the rise of ε' and ε'', improving the dielectric property. This effect can be attributed to a polarization interface due to the creation of dipoles between the CX interface and the polymer matrix 61,62 . The increase in the ε'', shown in Figure 9d, might be related to an increase in electrical conductivity, probably related to the higher concentration of porous carbon 29,63 .…”

Section: Electromagnetic Characterizationsmentioning

confidence: 99%

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Medeiros

Silva

et al. 2022

Mat. Res.

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Carbonaceous porous materials are strong candidates for producing low-cost, lightweight, and sustainable electromagnetic (EM) absorbing materials. This work investigates the production of radarabsorbing materials (RAM) by a simple method. Sustainable carbon xerogel (CX) was synthesized from tannin, a biosourced molecule. CX and commercial carbon nanotube (CNT) were embedded in a silicone matrix at proportions of 10 and 15 wt.% of CX and 0.1 wt.% of CNT to produce flexible composites. The morphology and structure of the carbonaceous materials were evaluated by fieldemission scanning electron microscopy (FEG-SEM), Raman spectroscopy, X-ray diffraction (XRD), textural properties by N 2 adsorption-desorption isotherms, and mercury porosimetry. The electromagnetic characterization of the composites was analyzed by a vector network analyzer (VNA) in the Ku-band. The results demonstrated that an increased concentration of CX in the composite improved reflection loss reaching -43.19 dB at 13.79 GHz.

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Section: Electromagnetic Characterizationsmentioning

confidence: 99%

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Medeiros

Silva

et al. 2022

Mat. Res.

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“…17) Esmail Kiani et al report the synthesis of M-type hexagonal ferrite powders, SrFe 12-2x La x (Mn 0.5 Zr 0.5 ) x O 19 (x = 0.0, 0.2, 0.4, 0.6, 0.8), by coprecipitation. 18) However, those scientists synthesized these particles simply by changing the pH to above 12. Some reports have serious errors in that an alkali solution was added drop-wise to increase the pH.…”

Section: Introductionmentioning

confidence: 99%

Ni_0.5Zn_0.4Cu_0.1Fe₂O₄Complex Ferrite Nanoparticles Synthesized by Chemical Coprecipitation Predicted by Thermodynamic Modeling

Kang¹,

Park²,

Ahn³

et al. 2013

Journal of the Korean Ceramic Society

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Thermodynamic modeling of the Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 complex ferrite system has been adopted as a rational approach to establish routes to better synthesis conditions for pure phase Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 complex ferrite. Quantitative analysis of the different reaction equilibria involved in the precipitation of Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 from aqueous solutions has been used to determine the optimum synthesis conditions. The spinel ferrites, such as magnetite and substitutes for magnetite, with the general formula MFe 2 O 4 , where M= Fe 2+ , Co 2+ , and Ni 2+ are prepared by coprecipitation of Fe 3+ and M 2+ ions with a stoichiometry of M 2+ /Fe 3+ = 0.5. The average particle size of the as synthesized Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 , measured by transmission electron microscopy (TEM), is 14.2 nm, with a standard deviation of 3.5 nm the size when calculated using X-ray diffraction (XRD) is 16 nm. When Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 ferrite is annealed at elevated temperature, larger grains are formed by the necking and mass transport between the Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 ferrite nanoparticles. Thus, the grain sizes of the Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 gradually increase as heat treatment temperature increases. Based on the results of Thermogravimetric Analysis (TGA) and Differential Scanning Calorimeter (DSC) analysis, it is found that the hydroxyl groups on the surface of the as synthesized ferrite nanoparticles finally decompose to Ni 0.5 Zn 0.4 Cu 0.1 Fe 2 O 4 crystal with heat treatment. The results of XRD and TEM confirmed the nanoscale dimensions and spinel structure of the samples.

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Investigation of electrical, dielectric and microwave properties of double substituted M-type Ba(1−2x)LaxNaxFe10Co0.5TiMn0.5O19 hexaferrite

Arora

Narang

2018

J Mater Sci: Mater Electron

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The Effects of Doping on Crystal Structure, Magnetic and Microwave Properties of SrFe12−2x La x (Mn0.5Zr0.5) x O19 Nanoparticles

Cited by 9 publications

References 12 publications

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Ni_0.5Zn_0.4Cu_0.1Fe₂O₄Complex Ferrite Nanoparticles Synthesized by Chemical Coprecipitation Predicted by Thermodynamic Modeling

Investigation of electrical, dielectric and microwave properties of double substituted M-type Ba(1−2x)LaxNaxFe10Co0.5TiMn0.5O19 hexaferrite

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The Effects of Doping on Crystal Structure, Magnetic and Microwave Properties of SrFe12−2x La x (Mn0.5Zr0.5) x O19 Nanoparticles

Cited by 9 publications

References 12 publications

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Sustainable Carbon Xerogel in the Production of Electromagnetic Radar Absorbing Composites in the Ku-Band

Ni0.5Zn0.4Cu0.1Fe2O4Complex Ferrite Nanoparticles Synthesized by Chemical Coprecipitation Predicted by Thermodynamic Modeling

Investigation of electrical, dielectric and microwave properties of double substituted M-type Ba(1−2x)LaxNaxFe10Co0.5TiMn0.5O19 hexaferrite

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Ni_0.5Zn_0.4Cu_0.1Fe₂O₄Complex Ferrite Nanoparticles Synthesized by Chemical Coprecipitation Predicted by Thermodynamic Modeling