Preparation and characterization of nanosize Mn–Zn ferrite

Rath, Chandana; Sahu, K.K.; Anand, S.; Date, S. K.; Mishra, N. C.; Das, R.P.

doi:10.1016/s0304-8853(99)00217-6

Cited by 172 publications

(62 citation statements)

References 24 publications

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“…These characteristics have enabled the use of nanosized magnetic materials in biomedicine (e.g., as bioseparators), drug delivery systems, medical diagnostics, and cancer thermotherapy [5][6][7]. Due to the new applications of ferrites ways of synthesizing them, other than the ceramic method, such as the sol-gel [8,9], the precipitation [10,11], the mechanochemical [12,13], the hydrothermal [14,15], the combustion [16][17][18][19][20], and the microemulsion methods [21,22], are being widely investigated. The unquestionable advantages of the above methods are: the mixing together of the reagents at the molecular level, energy efficiency, the fact that only one process stage is required, and the absence of secondary pollution or material loss.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Szczygieł

Winiarska

2013

J Therm Anal Calorim

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Mn-Zn ferrites were obtained by the sol-gel autocombustion methods. The effect of the precursor used in the sol-gel autocombustion synthesis on the ferrite's microstructure was examined. The as-obtained powders were characterized by XRD, FTIR, SEM, and TG/DTA. All ferrite powders obtained from different organic precursors, after gel autocombustion, were pure spinel phase, without secondary phases. The average crystallite size, estimated from Scherrer equation, was the smallest for ferrite obtained from a mixture of fuels/precursors (citric acid and EDTA). This ferrite powder has sponge-like microstructure with large pores, but it is less agglomerated than the material obtained from glycine as the fuel.

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Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Szczygieł

Winiarska

2013

J Therm Anal Calorim

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“…They also show the presence of 2-3% -Fe 2 O 3 peaks. The presence of such peaks has also been reported in other ferrite samples prepared by the chemical coprecipitation method [8]. The variation of the lattice parameter vs. Cr concentration is shown in Figure 2 which shows that the lattice parameter a 0 decreases linearly with the increase in Cr concentration.…”

Section: Resultsmentioning

confidence: 67%

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

et al. 2005

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X-ray and Mössbauer studies have been carried out for bulk and nano sized Cr x Co (0.5−x) Zn 0.5 Fe 2 O 4 (x=0, 0.1, 0.2, 0.25, 0.3, 0.4, 0.5) prepared through wet chemical co-precipitation method. The hyperfine fields in the bulk samples at tetrahedral A site is independent of the substitution while it decreases sharply at octahedral B site due to the quenching of A-B super-exchange interaction due to the addition of Cr ions which preferentially occupy the octahedral B sites. The average particle size for the nano samples was seen to decrease exponentially with the addition of Cr. The RT Mössbauer spectra for all the nano samples show only two paramagnetic doublets showing the superparamagnetic relaxation phenomena in these samples due to small particle sizes involved.

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“…There is also significant temperature dependence in the magnetization for the Zn ferrite NPs (Table 2). A large temperature dependence has been proposed to be a consequence of the uniform distribution of the cations across the A and B sites in the spinel structure, which is counter to the strong preference of the Zn 2+ to occupy only the A sites [36]. Note that bulk Zn ferrite only has BB interactions, due to the distribution of Zn into only the A sites and Fe into only the B sites, whereas nanoscale Zn ferrite redistributes both the Zn and Fe into both A and B sites, giving rise to the increase in AB interactions and thus an increase in magnetization and mass susceptibility over the bulk Zn ferrite [37][38][39].…”

Section: Magnetic Measurements Of Mn Ferrite Nps and Zn Ferrite Npsmentioning

confidence: 99%

Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn–Zn–ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs

Morrow

Snow

Ali

et al. 2018

Journal of Experimental Nanoscience

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(2018) Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn-Zn-ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs, Journal of Experimental Nanoscience ABSTRACTThe mass susceptibility (x mass ) and mass magnetization (M mass ) were determined for a series of ternary manganese and zinc ferrite nanoparticles (Mn-Zn ferrite NPs, Mn x Zn 1¡x Fe 2 O 4 ) with different Mn:Zn ratios (0.08 x 4.67), prepared by the thermal decomposition reaction of the appropriate metal acetylacetonate complexes, and for the binary homologs (M x Fe 3¡x O 4 , where M = Mn or Zn). Alteration of the Mn:Zn ratio in Mn-Zn ferrite NPs does not significantly affect the particle size. At room temperature and low applied field strength the mass susceptibility increases sharply as the Mn:Zn ratio increases, but above a ratio of 0.4 further increase in the amount of manganese results in the mass susceptibility decreasing slightly, reaching a plateau above Mn:Zn % 2. The compositional dependence of the mass magnetization shows less of a variation at room temperature and high applied fields. The temperature dependence of the mass magnetization of Mn-Zn ferrite NPs is significantly less for Mn-rich compositions making them more suitable for downhole imaging at higher temperatures (>100 C). For non-shale reservoirs, replacement of nMag by Mnrich Mn-Zn ferrites will allow for significant signal-to-noise enhancement of 6.5£ over NP magnetite.

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Preparation and characterization of nanosize Mn–Zn ferrite

Cited by 172 publications

References 24 publications

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Synthesis and characterization of manganese–zinc ferrite obtained by thermal decomposition from organic precursors

Mössbauer studies of Cr substituted bulk and nano Co–Zn ferrites

Temperature dependence on the mass susceptibility and mass magnetization of superparamagnetic Mn–Zn–ferrite nanoparticles as contrast agents for magnetic imaging of oil and gas reservoirs

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