Effect of AI3+ introduction into hydrothermally prepared ZnFe2O4

In the present work, pure and Sr 2? ions substituted Mg ferrite nanoparticles (NPs) had been prepared by co-precipitation method and their structural, optical, and magnetic properties at different calcination temperatures were studied. On this purpose, thermo gravimetric and differential thermal analysis (TG-DTA), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscopy, UV-Visible diffused reflectance spectroscopy, impedance spectroscopy, and vibrating sample magnetometer were carried out. The exoand endothermic processes of synthesized precursors were investigated by TG-DTA measurements. The structural properties of the obtained products were examined by XRD analysis and show that the synthesized NPs are in the cubic spinel structure. The existence of two bands around 578-583 and 430-436 cm -1 in FT-IR spectrum also confirmed the formation of spinel-structured ferrite NPs. The lattice constants and particle size are estimated using XRD data and found to be strongly dependent on calcination temperatures. The optical, electrical, and magnetic properties of ferrite compositions also investigated and found to be strongly dependant on calcination temperatures.

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“…The XRD spectrum of MgFe 2 O 4 obtained at 900°C shows Fig. 4 a FT-IR (Toledo et al 2000). A similar result was reported by Bhukal et al (2014).…”

Section: Structural Analysissupporting

confidence: 84%

Effects on structural, optical, and magnetic properties of pure and Sr-substituted MgFe2O4 nanoparticles at different calcination temperatures

Loganathan

Kumar

2015

Appl Nanosci

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“…Many methods of synthesis have been developed to obtain fine particles with controlled shapes and sizes [7][8][9][10][11][12]. The prehistory of parent solids, their ratio and the addition of small amounts of certain foreign oxides affected the solid-solid interaction between ferric oxides and transition metal oxides [7][8][9][10][11][12][13]. Treating the transition metal ferrites with small amounts of other transition metal cations modified their activity and selectivity [9,10].…”

Section: Introductionmentioning

confidence: 99%

Physicochemical and Catalytic Conversion of Iso-propanol over NiO-doping/nanosized ZnO-Fe2O3 system

2017

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“…Spinel 4 or inverse spinel with half of the trivalent ions in the A-sites and the other half together with divalent ions in the B-sites [6][7][8]. Ferrites of similar composition differ in their physical and chemical properties depending on the distribution of cations, having different oxidation states, among the available tetrahedral and octahedral sites.…”

Section: Introductionmentioning

confidence: 99%

Low-Temperature Synthesis of Nanocrystalline Mn0.2Ni0.8Fe2O4 by Oxalate Precursor Route

Hessien¹,

Zaki²,

Mohsen³

2013

AMPC

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Manganese nickel ferrite (Mn 0.2 Ni 0.8 Fe 2 O 4 ) powder was synthesized through oxalate precursor route. The effect of annealing temperature (400˚C -1100˚C) on the formation, crystalline size, morphology and magnetic properties was systematically studied. The resultant powders were investigated by thermal analyzer (TG-DTG-DSC), X-ray diffractometer (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). Based on thermal analysis results, the oxalate mixture decomposed thermally in multisteps weight loss up to about 680˚C. XRD indicated that Mn 0.2 Ni 0.8 Fe 2 O 4 formed at much lower annealing temperature (≤400˚C) but contained α-Fe 2 O 3 impurity. The hematite phase decreased by increasing the annealing temperature. The lattice parameters were increased with increasing annealing temperature up to 1000˚C. The average crystalline size increased by increasing the annealing temperature. Single well crystalline ferrite was obtained at 800˚C with crystallite size about 109 nm. The saturation magnetization of the ferrites powders continuously increased with the increase in annealing temperature. Maximum saturation magnetization 48.2 emu/g was achieved for the formed Mn 0.2 Ni 0.8 Fe 2 O 4 phase at annealing temperature 1100˚C.

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Effect of AI3+ introduction into hydrothermally prepared ZnFe2O4

Cited by 84 publications

References 33 publications

Effects on structural, optical, and magnetic properties of pure and Sr-substituted MgFe2O4 nanoparticles at different calcination temperatures

Effects on structural, optical, and magnetic properties of pure and Sr-substituted MgFe2O4 nanoparticles at different calcination temperatures

Physicochemical and Catalytic Conversion of Iso-propanol over NiO-doping/nanosized ZnO-Fe2O3 system

Low-Temperature Synthesis of Nanocrystalline Mn<sub>0.2</sub>Ni<sub>0.8</sub>Fe2O<sub>4</sub> by Oxalate Precursor Route

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Effect of AI3+ introduction into hydrothermally prepared ZnFe2O4

Cited by 84 publications

References 33 publications

Effects on structural, optical, and magnetic properties of pure and Sr-substituted MgFe2O4 nanoparticles at different calcination temperatures

Effects on structural, optical, and magnetic properties of pure and Sr-substituted MgFe2O4 nanoparticles at different calcination temperatures

Physicochemical and Catalytic Conversion of Iso-propanol over NiO-doping/nanosized ZnO-Fe2O3 system

Low-Temperature Synthesis of Nanocrystalline Mn&lt;sub&gt;0.2&lt;/sub&gt;Ni&lt;sub&gt;0.8&lt;/sub&gt;Fe2O&lt;sub&gt;4&lt;/sub&gt; by Oxalate Precursor Route

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Low-Temperature Synthesis of Nanocrystalline Mn<sub>0.2</sub>Ni<sub>0.8</sub>Fe2O<sub>4</sub> by Oxalate Precursor Route