Tetragonal copper ferrite obtained by self-propagating combustion

Gingaşu, Dana; Mîndru, Ioana; Patron, Luminiţa; Cizmas, C.B.

doi:10.1016/j.jallcom.2007.06.039

Cited by 22 publications

(20 citation statements)

References 13 publications

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“…1) show two intense absorption bands ν 1 and ν 2 , corresponding to the vibration of tetrahedral and octahedral complexes, which are indicative of formation of spinel structure being in agreement with the literature data [22,23,24]. The higher frequency band ν 1 is in the range 530-640 cm -1 and the lower frequency band ν 2 is in the range 400-480 cm The average crystallites size was evaluated using Scherrer's formula [25]:…”

Section: Characterization Of Nanocrystalline Ferritessupporting

confidence: 82%

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

et al. 2015

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Dye pollution in waste waters causes serious environmental and health risk, legislation problems and is a serious challenge to environmental scientists. In this work the treatment of waste waters resulted from ink jet cartridges manufacturing, using different nanocrystalline ferrites M II Fe 2 O 4 (M II = Mg, Cu) as adsorbent materials, has been investigated. The ferrites were obtained by thermal decomposition at 500°C of the magnesium and copper ferrioxalate coordination compounds. The nanocrystalline ferrites powder was investigated by various methods such as XRD, IR, SEM and EDX. The discoloration of the waste waters has been spectrophotometrically studied. The ferrites could be removed easily after adsorption by using a magnetic filtration process. The results indicated that the maximum adsorption efficiency was obtained after 60 min of treatment, magnesium ferrite showing a higher efficiency than the copper ferrite in the treatment process of waters resulted from ink jet cartridges manufacturing.

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Section: Characterization Of Nanocrystalline Ferritessupporting

confidence: 82%

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

et al. 2015

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“…Various synthesis methods have been employed to obtain ferrite nanoparticles with superior magnetic and electrical properties. These synthesis routes include chemical auto-combustion route [6,7], sol-gel [8,9], conventional ceramic process [10e12], and RF-sputtering [13,14], etc. Among other established synthesis methods, simple and cost effective routes to synthesize nanocrystalline MFe 2 O 4 by utilization of cheap, nontoxic and environmentally benign precursors are still the key issue.…”

Section: Introductionmentioning

confidence: 99%

“…The cubic phase is stable at temperatures higher than 360 C, but it is obtained as a metastable phase at room temperature by quenching from high temperatures. In such cases, more Cu 2þ ions occupy the A-sites and the tetragonal distortion diminishes[6]. Prince and Treuting[20] carried out a neutron diffraction study on the CuFe 2 O 4 powder.…”

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confidence: 99%

Characterization and magnetic properties of nanocrystalline CuFe2O4, NiFe2O4, ZnFe2O4 powders prepared by the Aloe vera extract solution

Laokul¹,

Amornkitbamrung²,

Seraphin³

et al. 2011

Current Applied Physics

348

108

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“…In a series of previous papers, we succeeded to isolate and characterize the precursors from GNP. [18,19,24,28] …”

Section: Resultsmentioning

confidence: 99%

“…This ratio affects the velocity of the combustion, the temperature of the flame, and, implicitly, the features of the final oxides. [18,19,[22][23][24][25] In order to obtain nanosized chromium substituted cobalt ferrites, many research groups have used the solution combustion method with various fuels, like urea, [26] citric acid [21,27] etc. P. P. Hankare et al have developed a sol-gel autocombustion method to obtain nanocrystalline CoFe2-xCrxO4 powders (0  x  2) using citric acid as fuel.…”

Section: Introductionmentioning

confidence: 99%

Chromium Substituted Cobalt Ferrites by Glycine-Nitrates Process

Gingaşu¹,

Diamandescu²,

Mîndru³

et al. 2015

Croat. Chem. Acta

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Chromium substituted cobalt ferrites (CoFe2-xCrxO4, 0  x  2) were synthesized through solution combustion method using glycine as fuel, named glycine-nitrates process (GNP). As evidenced by X-ray diffraction data (XRD), single cubic spinel phase was formed for all CoFe2−xCrxO4 (0  x  2) series. The cubic lattice parameter (a) decreases with increasing chromium content. Room temperature 57 Fe Mössbauer spectra revealed the Fe 3+ and Cr 3+ site occupancy, the local hyperfine magnetic fields and the substitution of Fe 3+ by Cr 3+ in the lattice. Scanning electron microscopy (SEM) showed a refinement of particle size with the increase of Cr 3+ content. Magnetic measurements from 5 K to 120 K have shown a dropping in the saturation magnetization as the chromium content increases. This behaviour has been explained in terms of substitution of Fe 3+ by Cr 3+ in the cubic lattice of cobalt ferrite.

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Tetragonal copper ferrite obtained by self-propagating combustion

Cited by 22 publications

References 13 publications

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

Nanocrystalline ferrites used as adsorbent in the treatment process of waste waters resulted from ink jet cartridges manufacturing

Characterization and magnetic properties of nanocrystalline CuFe2O4, NiFe2O4, ZnFe2O4 powders prepared by the Aloe vera extract solution

Chromium Substituted Cobalt Ferrites by Glycine-Nitrates Process

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