Synthesis and characterization of MFe2O4 (M=Mg, Mn, Ni) nanoparticles

Pui, Aurel; Ghercă, Daniel; Cornei, Nicoleta

doi:10.1016/j.materresbull.2012.11.088

Cited by 37 publications

(12 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7,8 As a response to the large demand numerous techniques have been employed to obtained ferrites in nanoparticle form, 9 thin and thick films, 10,11 or controlled morphology such as nanocubes and nanorods. 12 Most commonly used synthesis methods are the ceramic method, 13,14 in solution syntheses, 15 sol-gel methods 16 and laser ablation or RF sputtering for thin and thick layer formulations. 17,18 Each of the ferrite applications require specific characteristics.…”

Section: Introductionmentioning

confidence: 99%

Increased sensibility of mixed ferrite humidity sensors by subsequent heat treatment

Vîrlan

Tudorache

Pui

2017

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

The study presents the effects of different calcination temperatures on the size and morphology of mixed Co‐Ni ferrites, and the respective changes in the magnetic and electrical properties, with emphasis on their applicability as humidity sensors. The data suggests that the heat treatment does not significantly change the magnetic properties, but significant variations on the morphology of the nanoparticles, correlated with large changes in the electrical properties of the nanoparticles in terms of electrical permittivity and resistivity with electrical field frequency and humidity, with a clear influence of the calcination temperature over the sensibility of the materials to humidity.

show abstract

Section: Introductionmentioning

confidence: 99%

Increased sensibility of mixed ferrite humidity sensors by subsequent heat treatment

Vîrlan

Tudorache

Pui

2017

Int J Applied Ceramic Tech

Self Cite

View full text Add to dashboard Cite

show abstract

“…Synthesis of nanocrystalline inorganic materials by using a natural surfactant, such as cellulose, is an alternative method more and more used. Organic surfactants (e.g., carboxymethyl cellulose (CMC) [12], Aloe Vera [13], Manuscript CMC solution was added into above solutions as a capping agent, followed by the addition of an aqueous solution of 3M NaOH. The pH of the solutions was continuously monitored and maintained in the range of 11-12.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Co-Substituted Ferrite Nanocomposites

Nica

Daniel

Ursu³

et al. 2013

IEEE Trans. Magn.

Self Cite

View full text Add to dashboard Cite

We report the synthesis of Co NiFe O (where x is 0, 0.25, 0.50, 0.75, 1) nanoparticles (NPs) by a wet chemical method using carboxymethyl cellulose (CMC) solution as surfactant. Their structure and magnetic properties were evaluated by X-ray diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR) and vibrating sample magnetometer (VSM). The gas and humidity sensing properties of the samples were also investigated. Powder X-ray diffraction analysis demonstrated the formation of face-centered cubic structure for all the samples. The average crystallite size and lattice parameters have been calculated by Rietveld refinement. The FTIR spectra of NPs confirm the presence of CMC functional groups and stretching bands attributed to the intrinsic vibrations of tetrahedral and octahedral sites of spinel ferrite. The magnetization curves of the nanocomposites at room temperature demonstrated saturation magnetizations from 21 emu/g to 58 emu/g and coercivity values between 130 Oe and 835 Oe. As not many studies have been published on this topic, the gas sensing properties of Ni-substituted Co ferrites have been evaluated. The measurements revealed that Co Ni Fe O is the most sensitive to acetone vapors.

show abstract

“…All annealed samples exhibit Bragg reflections peaks perfectly indexed to the cubic spinel structure (Fd-3m) indicating the formation of the single-phase ZnFe2O4 spinel ferrites [35,49], but a slight contribution appears at the lowest NaOH concentration corresponding to an impurity phase such as Fe2O3, which dominates over (400) plane once the concentration is increased. XRD patterns show broad peaks due to small crystallite size.…”

Section: Results and Discussion X-ray Diffraction Analysismentioning

confidence: 99%

Influence of Precipitating Agent Concentration on Nanoparticles Size and Magnetic Properties of Zinc Ferrites

Trandafir¹,

Ciocarlan²,

Pui³

et al. 2020

Rev. Chim.

Self Cite

View full text Add to dashboard Cite

A series of Zn ferrite nanoparticles was prepared by varying the concentration of precipitating agent (NaOH) in the range of 1 � 5 M. Carboxymethylcellulose (CMC) was used as capping agent for stabilizing the particles and to prevent agglomeration. The synthesis done at low temperature was followed by a thermal treatment at 500ºC for 6 h in air. The crystallite size determined using Scherer formula ranged between 8 - 10 nm while the nanoparticles average size observed by Transmission Electron Microscopy varied in between 7-10 nm showing that the increase of coprecipitation agent concentration influences the particles growth. Vibrating sample magnetometry confirmed the strong influence that nanoparticles morphology and size play on superparamagnetic properties of Zn ferrite.

show abstract

Synthesis and characterization of MFe2O4 (M=Mg, Mn, Ni) nanoparticles

Cited by 37 publications

References 25 publications

Increased sensibility of mixed ferrite humidity sensors by subsequent heat treatment

Increased sensibility of mixed ferrite humidity sensors by subsequent heat treatment

Synthesis and Characterization of Co-Substituted Ferrite Nanocomposites

Influence of Precipitating Agent Concentration on Nanoparticles Size and Magnetic Properties of Zinc Ferrites

Contact Info

Product

Resources

About