Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles

Zhao, Donglin; Wu, Xuedong; Guan, Hongyu; Han, En‐Hou

doi:10.1016/j.supflu.2007.03.004

Cited by 151 publications

(79 citation statements)

References 35 publications

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“…The calculated crystallite size was found to be as 21 (±5) nm and these results were well agreement with literature [21] [22]. The lattice constant of all these ferrites were evaluated by using Equation (2). Similar work was With the analysis of these images it is confirmed that, the synthesised particles are exhibiting well defined crystalline nature.…”

Section: Xrd Analysissupporting

confidence: 84%

Effect of Bi3+ Ion Substitution on Magnetic Properties of Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

Kumar¹,

Kumar²

2016

SNL

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Section: Xrd Analysissupporting

confidence: 84%

Effect of Bi3+ Ion Substitution on Magnetic Properties of Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

Kumar¹,

Kumar²

2016

SNL

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“…It exhibits moderate saturation magnetization as well as excellent chemical stability. Several methods have been proposed for the preparation of this material with various magnetic properties, such as co-precipitation [7], oxidation [7], hydrothermal [8] or sol-gel synthesis [9][10].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the magnetic properties and magnetorheological behavior of spinel nanocrystalline cobalt ferrite by varying annealing temperature

et al. 2014

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Magnetic nanoparticles of spinel nanocrystalline cobalt ferrite were synthesized via the solgel method and subsequent annealing. The influence of the annealing temperature on the structure, magnetic properties, and magnetorheological effect was investigated. The finite crystallite size of particles determined by X-ray diffraction as well as particle size observed via transmission electron microscopy increased with annealing temperature. The magnetic properties observed via vibrating sample magnetometer showed that an increase in the annealing temperature leads to the increase in the magnetization saturation and, in contrast, a decrease in coercivity. The effect of annealing on magnetic properties of ferrite particles has been explained by the recrystallization process at high temperature resulting in grain size growth and decrease in an imposed stress relating to defects of crystal lattice structure of nanoparticles. The magnetorheological characteristics of suspensions of ferrite particles in silicone oil were measured using a rotational rheometer equipped with a magnetic field generator in both steady shear and small-strain oscillatory regime. The magnetorheological performance expressed as a relative increase in magnetoviscosity appeared to be significantly higher for suspensions of particles annealed at 1000 C.

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“…To obtain nano sized spinel ferrite particles, various preparation techniques have been developed. Some of these preparation approaches are hydrothermal synthesis [14][15][16][17][18][19], coprecipitation [20][21][22], sol-gel [23,24] and microemulsion processes [25][26][27][28][29]. In this work, a new series of Nd, Nd-Co, Nd-Ce, Nd-Cr, Nd-Ni doped Fe 3 O 4 nanoparticles were successfully synthesized by co-precipitation method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of M–Nd doped Fe<sub>3</sub>O<sub>4</sub> nanoparticles (M = Co, Ce, Cr, Ni) with tunable magnetic properties

Yousefi¹,

Alimard²

2012

Bull. Chem. Soc. Eth.

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ABSTRACT. Magnetic nanoparticles were prepared by the aqueous co-precipitation method. The magnetic nanoparticles obtained were characterized systematically through the use of an X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR) and a vibrating sampling magnetometer (VSM). The results revealed that the magnetic nanoparticles were spherical shaped with inverse spinel structure. The size of Fe3O4 and Nd-Co doped Fe3O4 magnetic nanoparticles were approximately 15 nm. Magnetic measurement revealed that the nanoparticles were super paramagnetic at room temperature. It was found that the magnetic response of the Fe3O4 increased when it was doped with Nd 3+ and Co 2+ . However, the magnetic response of the Fe3O4 decreased when it was doped with Nd 3+ or Ce 3+ or Cr 3+ or Ni 2+ .

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Study on supercritical hydrothermal synthesis of CoFe2O4 nanoparticles

Cited by 151 publications

References 35 publications

Effect of Bi3+ Ion Substitution on Magnetic Properties of Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

Effect of Bi3+ Ion Substitution on Magnetic Properties of Cobalt Nano Ferrites Prepared by Sol-Gel Combustion Method

Tailoring the magnetic properties and magnetorheological behavior of spinel nanocrystalline cobalt ferrite by varying annealing temperature

Synthesis of M–Nd doped Fe<sub>3</sub>O<sub>4</sub> nanoparticles (M = Co, Ce, Cr, Ni) with tunable magnetic properties

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