Synthesis of nanocrystalline nickel ferrite by thermal decomposition of organic precursors

Stoia, Marcela; Barvinschi, Paul; Barbu–Tudoran, Lucian; Barbu, Mirela; Ştefănescu, Mircea

doi:10.1007/s10973-011-1903-0

Cited by 25 publications

(9 citation statements)

References 24 publications

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“…The value of ~240 cm −1 for difference between ν as and ν s suggests that carboxylate group coordinates in a monodentate fashion . The bands at around 1384, 1015 and 800 cm −1 can be attributed to the presence of nitrate ions . In the IR spectrum of sample heated at 400°C for 2 h, all the organic peaks are seen to disappear and two new absorption peaks appear at ~548 and ~445 cm −1 which are characteristic to Fe–O stretching and bending vibrations of octahedral FeO 6 groups in the perovskite compounds…”

Section: Resultsmentioning

confidence: 98%

“…The broad absorption band in the range of 3500–3000 cm −1 can be assigned to O–H stretching, which decreases in intensity as thermal‐treatment temperature increases. The strong bands located at ~1670 and ~1300 cm −1 can be assigned to C=O bonds formed by oxidation of secondary C–OH group of propylene glycol by NO 3 − ions . The intense bands located at ~1590 and ~1350 cm −1 can be assigned to the antisymmetric (ν as ) and symmetric (ν s ) vibration of carboxylate (COO − ) group formed by oxidation of primary C–OH group of propylene glycol .…”

Section: Resultsmentioning

confidence: 99%

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Low Temperature Synthesis, Structural, Optical and Magnetic Properties of Bismuth Ferrite Nanoparticles

Srivastav

Gajbhiye

2012

J. Am. Ceram. Soc.

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Phase pure nanosized BiFeO3 (BFO) powder was synthesized by sol–gel method based on the propylene glycol‐gel reaction. The formation mechanism, crystal structure, magnetic and optical properties were investigated by thermogravimetry, differential thermal analysis, infrared spectroscopy, X–ray diffractometry, Rietveld analysis, Raman spectroscopy, transmission electron microscopy, SQUID magnetometry and ultraviolet–visible spectroscopy. X–ray diffraction and Raman studies revealed the formation of pure and well‐crystallized BFO nanocrystallites at a low temperature of 400°C. The BFO nanoparticles showed weak ferromagnetic property at room temperature due to size‐confinement effects. The UV–visible spectra showed strong band‐gap absorption at ~590 nm (2.1 eV) for BFO nanoparticles suggesting their potential application as visible‐light‐response photocatalyst.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Low Temperature Synthesis, Structural, Optical and Magnetic Properties of Bismuth Ferrite Nanoparticles

Srivastav

Gajbhiye

2012

J. Am. Ceram. Soc.

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“…O). Due to the fact that the link length in the tetrahedral site is shorter, the vibration in the tetrahedral sites is more intense than in octahedral sites [48,49]. Through the infrared spectra, it could be seen the removal of most of the organic compounds and subsequent formation of the ferrite phase, confirmed by X-ray diffraction (Fig.…”

Section: Resultsmentioning

confidence: 84%

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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“…To synthesize NiFe 2 O 4 , several preparation routes have been proposed including co-precipitation [3,10], combustion synthesis [11,12], the reverse micelle technique [13], electrospinning [14], thermal decomposition [15][16][17], synthesis by thermal plasma [18], high-energy milling [19,20], sol-gel method [21,22], microwave-hydrothermal method [23], and the solid-state method [24]. This broad spectrum of syntheses has several advantages and drawbacks.…”

Section: Introductionmentioning

confidence: 99%

The effect of neodymium substitution on the structural and magnetic properties of nickel ferrite

Şabikoğlu

Paralı

Malina

et al. 2015

Progress in Natural Science: Materials International

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Nickel ferrite NiFe 2 O 4 is a typical soft magnetic ferrite with high electrical resistivity used as high frequency magnetic material. Neodymium (Nd 3 þ ) doped NiFe 2 O 4 materials were fabricated using solid state reaction. The properties of the obtained material were investigated by X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), Fourier-Transform Infrared Spectroscopy (FT-IR), magnetic measurements on SQUID and Mössbauer spectroscopy. It was found that the material consists of two different phases: Nd 3 þ doped NiFe 2 O 4 and NdFeO 3 . The Nd 3 þ ions occupy cation sites of the NiFe 2 O 4 inverse spinel structure. NdFeO 3 phase occurred when the level of Nd 3 þ atoms exceed a percolation limit. The presence of both phases was confirmed by SEM observations. The Mössbauer spectra analysis showed two sextets, which can be ascribed to iron atoms in tetrahedral and octahedral positions. From their intensities it is concluded that Nd 3 þ occupies octahedral sites in the spinel structure of NiFe 2 O 4 , which were originally occupied by Ni 2 þ .

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Synthesis of nanocrystalline nickel ferrite by thermal decomposition of organic precursors

Cited by 25 publications

References 24 publications

Low Temperature Synthesis, Structural, Optical and Magnetic Properties of Bismuth Ferrite Nanoparticles

Low Temperature Synthesis, Structural, Optical and Magnetic Properties of Bismuth Ferrite Nanoparticles

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

The effect of neodymium substitution on the structural and magnetic properties of nickel ferrite

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