Synthesis of manganese ferrite from non-standard raw materials using ceramic technique

Ahmed, Y. M. Z.

doi:10.1016/j.ceramint.2009.11.020

Cited by 58 publications

(16 citation statements)

References 23 publications

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“…Upadhyay et al [14] have reported a saturation magnetization (M s ) value of 2.7 emu/g measured at a field of 1000G for MnFe 2 O 4 prepared by co-precipitation method. However this value is very low when compared to the bulk value of 62 emu/g prepared by ceramic method [15].…”

Section: Magnetic Studiesmentioning

confidence: 80%

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Venkataraju

Satishkumar²,

Sivakumar

2011

J Mater Sci: Mater Electron

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Nanoparticles of MnBi x Fe 2-x O 4 (x = 0.0, 0.02, 0.04, 0.06) have been synthesized by a chemical co-precipitation method. X-ray diffraction analysis (XRD) reveals that bismuth exits in its Bi 3? and Bi 5? state. It was also observed that bismuth substitution enhances the grain growth and density. The dielectric constant (e 0 ) and the loss tangent (tan d) increases with increase in bismuth content. Resistivity (q) and maximum magnetization (M) was found to decrease with increasing bismuth content.

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Section: Magnetic Studiesmentioning

confidence: 80%

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Venkataraju

Satishkumar²,

Sivakumar

2011

J Mater Sci: Mater Electron

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“…Sample B was obtained by the hydrothermal method which is one of the more successful ways to grow crystals of many different materials [5]. To obtain sample B, MnCl 2 ·4H 2 O and FeCl 3 ·6H 2 O in aqueous solution were used as raw materials and the precipitation was done with NaOH.…”

Section: The Obtaining Of Samplesmentioning

confidence: 99%

“…In various studies, manganese ferrite was obtained using FeSO 4 ·7H 2 O and MnSO 4 ·H 2 O [2] or Mn(NO 3 ) 2 ·4 H 2 O and Fe(NO 3 ) 3 ·9 H 2 O [3][4] as reactants, at different calcination temperatures and by mixing with different molar ratios for the same reaction [5].…”

Section: Introductionmentioning

confidence: 99%

Complex Impedance of Manganese Ferrite Powders Obtained by Two Different Methods

Mălăescu

Lungu

Marin

et al. 2015

Annals of West University of Timisoara - Physics

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Two samples of manganese ferrite powder were obtained by the calcination method (sample A) and hydrothermal method (sample B). The crystal structure of the samples has been determined using X-ray diffraction analysis (XRD). The results shown that the sample A has three phases (FeMnO3, Mn2O3 and Fe2O3) and the prevailing phase is FeMnO3 with perovskite structure and the sample B has only a single phase (MnFe2O4). The grain morphology was analyzed by scanning electron microscopy (SEM) and the compositional analysis was done by energy dispersive spectroscopy (EDAX). Measurements of the frequency (f) and temperature (T) dependent complex impedance, Z(f, T) = Z’(f, T) - i Z’’(f, T) of the samples over the frequency range 20 Hz - 2 MHz, at various temperature values from 300C to 1100C are presented. From these measurements, we have shown that the temperature dependence of the relaxation time is of Arhenius type, which suggests that the conduction process is thermally activated. The values obtained for the activation energy Ea, are: 16meV (sample A) and 147.65meV (sample B). Applying complex impedance spectroscopy technique, the obtained results shows the shape of a single semicircle at each temperature over the measurement range, meaning that the electrical process obeys to a single relaxation mechanism. The impedance and related parameters of the electrical equivalent circuit depend on the temperature and the microstructure of samples. The resistive and capacitive properties of the investigated samples are dominated with the conduction and relaxation processes associated with the grain boundaries mechanism..

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“…The production method significantly affects the shape and size of the particles, which determines the microstructural and electromagnetic properties of the material [8][9][10]. For example, one of the most widespread methods of obtaining ferrite powder is ceramic synthesis [11][12][13][14]. However, the disadvantage of this method is the long-term high-temperature annealing, which leads to an inhomogeneity of particles, the manifestation of anisotropy, and the poor reproducibility of electromagnetic properties; therefore, chemical syntheses are promising methods for obtaining ferrite materials.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Microstructural and Electromagnetic Characteristics of Cobalt-Zinc Ferrite

Goryachko

Ivanin

Buz’ko

2020

kcmf

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In this study, cobalt-zinc ferrite (Co0.5Zn0.5Fe2O4) was obtained by the glycine-nitrate method followed by annealing in a high-temperature furnace at a temperature of 1300 °С. The qualitative composition and its microstructural characteristics were determined using energy-dispersive X-ray spectroscopy, X-ray diffraction analysis, and scanning electron microscopy.The analysis of the micrographs demonstrated that the cobalt-zinc ferrite micropowder obtained after thermal annealing has an average particle size of 1.7±1 μm. The analysis of XRD data showed that the annealed cobalt-zinc ferrite micropowder has a cubic crystal structure with a lattice parameter of a = 8.415 Å. Using the Scherrer and Williamson-Hall equations we calculated the average sizes of the coherent scattering regions, which were commensurate with the size of crystallites: according to the Scherrer equation D = 28.26 nm and according to the Williamson-Hall equation D = 33.59 nm and the microstress value e = 5.62×10–4 in the ferrite structure.Using a vector network analyser, the electromagnetic properties of a composite material based on synthesized cobalt-zinc ferrite were determined. The frequency dependences of the magnetic and dielectric permeability values from the measured S-parameters of the composite material (50% ferrite filler by weight and 50% paraffin) were determined using the Nicolson-Ross-Weir method and were in the range of 0.015–7 GHz. The analysis of the graphs of the dependence of the magnetic permeability on the frequency of electromagnetic radiation revealed a resonance frequency of fr ≈ 2.3 GHz. 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Synthesis of manganese ferrite from non-standard raw materials using ceramic technique

Cited by 58 publications

References 23 publications

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Effect of bismuth on the properties of Mn ferrite nanoparticles prepared by co-precipitation method

Complex Impedance of Manganese Ferrite Powders Obtained by Two Different Methods

Synthesis, Microstructural and Electromagnetic Characteristics of Cobalt-Zinc Ferrite

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