Synthesis and characterization of Zn1−xNixFe2O4 spinels prepared by a citrate precursor

Mouallem-Bahout, M.; Bertrand, Sarah; Peña, O.

doi:10.1016/j.jssc.2005.01.009

Cited by 141 publications

(49 citation statements)

References 19 publications

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“…It was observed that with increasing temperature, the lattice parameter, the network microdeformation and the cell volume decrease, and the material density increase, a result that agrees with Saba et al [32] Zhang et al [43] and Mouallem-Bahout et al [31], who calcined Ni-Zn ferrite at 800°C for 240 min, 900°C for 120 min, and 650°C for 900 min, respectively. Figure 2 shows the thermal analysis of Ni-Zn ferrite precursor powders.…”

Section: Resultssupporting

confidence: 80%

“…Mouallem-Bahout et al [31] synthesized Ni-Zn ferrite by the citrate precursor method and obtained single phase at temperature of 650°C for 900 min, showing an average crystallite size between 20 and 90 nm and lattice parameter of 8.44 Å . Saba et al [32] obtained ferrite Ni 0.5 Zn 0.5 Fe 2 O 4 with secondary phases by the electrodeposition method by anodizing with calcination at 800°C for 240 min with average crystallite size of 39 nm and lattice parameter of 8.40 Å .…”

Section: Resultsmentioning

confidence: 99%

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Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Assis¹,

Bomio²,

Nascimento³

et al. 2014

J Therm Anal Calorim

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Ferrites Ni 0.75 Zn 0.25 Fe 2 O 4 were obtained by polymeric precursor method and calcined in a short time with microwave energy to assess the morphological and microstructural characteristics. Samples were calcined at 500, 650, 800, and 950°C for 30 min in a microwave oven. The resulting powders were characterized by thermal analysis (TG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectrometer, field-emission gun scanning electron microscope (FEG-SEM), and energy-dispersive X-ray spectroscopy. The XRD results showed the formation of single ferrite phase at temperature of 500°C for 30 min. The FEG-SEM analysis showed agglomerated particles with formation of non-dense longitudinal plates, with interparticle porosity and agglomerated fine particles. The rapid calcination by microwave energy demonstrated satisfactory results in relatively low temperature of 500°C for 30 min and appeared to be a promising technique for obtaining nickel-zinc ferrite powders.

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Section: Resultssupporting

confidence: 80%

Section: Resultsmentioning

confidence: 99%

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Assis¹,

Bomio²,

Nascimento³

et al. 2014

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

“…Several conventional and unconventional methods are used for the synthesis of nanosized ferrites viz. hydrothermal [5], microwave hydrothermal [6], coprecipitation [7], sol-gel [8], reverse micelle [9], high energy ball milling [10], citrate precursor method [11], etc. We have synthesized the NiZn ferrite Ni 0.5 Zn 0.5 Fe 2 O 4 in nanocrystalline form by a combustion method [12,13] and studied the magnetic properties of the resulting powders.…”

Section: Introductionmentioning

confidence: 99%

Magnetic and Mössbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method

et al. 2008

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The properties of nanocrystalline Ni 0.5 Zn 0.5 Fe 2 O 4 synthesized by an auto-combustion method have been investigated by magnetic measurements and Mössbauer spectroscopy. The as-synthesized single phase nanosized ferrite powder is annealed at different temperatures in the range 673-1,273 K to obtain nanoparticles of different sizes. The powders are characterized by powder X-ray diffraction, vibrating sample magnetometer, transmission electron microscopy and Mössbauer spectroscopy. The as-synthesized powder with average particle size of ∼9 nm is superparamagnetic. Magnetic transition temperature increases up to 665 K for the nanosized powder as compared to the transition temperature of 548 K for the bulk ferrite. This has been confirmed as due to the abnormal cation distribution, as evidenced from room temperature Mössbauer spectroscopic studies.

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“…Nitrogen adsorption isotherms provided surface areas ranging from approximately 8.7 m 2 g À1 for the sample annealed at 600 8C to less than 1 m 2 g À1 when heated at 1000 8C, which is well in accordance with other metal oxides obtained by the same procedure. [17] The area values are inversely proportional to the annealing temperature due to the sintering effect promoting particle growth. The same behaviour has been reported for ferrite compounds.…”

Section: Resultsmentioning

confidence: 99%

⁵⁷Fe Mössbauer Spectroscopy and Electron Microscopy Study of Metal Extraction from CuFe₂O₄ Electrodes in Lithium Cells

2007

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Active CuFe(2)O(4) electrode materials for lithium cells are produced by thermal decomposition of a citrate precursor. The precipitation of the metal citrate is carried out by a freeze-drying procedure. A tetragonally distorted spinel structure is prepared by the decomposition of a citrate precursor. Samples free of impurities are obtained depending on the annealing temperature. The sample heated at 800 degrees C performed at 470 mAh g(-1) after 50 cycles. Electron microscopy is used as the ultimate technique to monitor the morphological changes upon the reversible conversion reaction. Detachment of metallic particles from the starting material, the formation of a polymeric organic film, and the subsequent removal on charging are discussed as determining factors in the electrochemical behaviour of this oxide as an electrode versus lithium. The growth of metallic iron aggregates is inferred from the (57)Fe Mössbauer spectra.

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Synthesis and characterization of Zn1−xNixFe2O4 spinels prepared by a citrate precursor

Cited by 141 publications

References 19 publications

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Magnetic and Mössbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method

⁵⁷Fe Mössbauer Spectroscopy and Electron Microscopy Study of Metal Extraction from CuFe₂O₄ Electrodes in Lithium Cells

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Synthesis and characterization of Zn1−xNixFe2O4 spinels prepared by a citrate precursor

Cited by 141 publications

References 19 publications

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Magnetic and Mössbauer spectroscopic studies of NiZn ferrite nanoparticles synthesized by a combustion method

57Fe Mössbauer Spectroscopy and Electron Microscopy Study of Metal Extraction from CuFe2O4 Electrodes in Lithium Cells

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⁵⁷Fe Mössbauer Spectroscopy and Electron Microscopy Study of Metal Extraction from CuFe₂O₄ Electrodes in Lithium Cells