Low-temperature synthesis and characterization of the Mn–Zn ferrite

Szczygieł, I.; Winiarska, Katarzyna

doi:10.1007/s10973-010-0988-1

Cited by 23 publications

(6 citation statements)

References 22 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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“…Additionally, the ferrites and Fe 2 O 3 inclusions of several micrometers in grain size uniformly dispersed through the matrix were identified . In our opinion, the weight loss in the temperature range of 1050–1200 °C is probably related to a zinc loss, − which increases with increasing temperature.…”

Section: Resultsmentioning

confidence: 75%

Mg–Zn and Mn–Zn Ferrites Derived from Coil Core Materials as New Phenol Methylation Catalysts

Klimkiewicz

Grabowska

Miśta

et al. 2012

Ind. Eng. Chem. Res.

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A catalytic phenol methylation study on two ferrospinel materials (Mg 0.63 Zn 0.37 )(Mn 0.1 Fe 1.8 )O 3.85 (hereafter Mg− Zn) and (Mn 0.55 Zn 0.35 Fe 0.1 )Fe 2 O 4 (hereafter Mn−Zn) was performed. The reaction was carried out in the gas phase in a continuous manner with the feed composition of phenol, methanol, and water in molar ratio 1:5:1. Both ferrites are active in the studied reaction. The alkylation of phenol with methanol led to the selective production of o-methylated phenol derivatives, i.e., o-cresol and 2,6-xylenol. However, both catalysts markedly differ in terms of activity. Different synergy effects on both catalysts cannot be a sufficient explanation. These materials do not differ significantly either in their susceptibility to reduction or in their Lewis type acidity. Because their microstructure differs significantly, a size effect may therefore be responsible for the differences in activity.

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“…The bottom-up nanotechnology approach, including soft chemical method, allows to synthesize homogeneous materials with defined morphology. Among these methods, especially sol-gel autocombustion [1][2][3][4][5][6], coprecipitation [7,8], the hydrothermal and solvothermal [9][10][11], the reverse micelles [12] and the mechanochemical [13] methods have been extensively studied in the last years. Ferrite produced by chemical methods is often characterized by unique properties suitable for new advanced application, i.e., magnetic high-density information storage or drug delivery or contrast agent in biomedicine [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

The study of thermal, microstructural and magnetic properties of manganese–zinc ferrite prepared by co-precipitation method using different precipitants

Szczygieł

Winiarska

Sobianowska-Turek

2018

J Therm Anal Calorim

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Mn-Zn ferrite was prepared from the solution after acid leaching of spent batteries by co-precipitation method using ammonia oxalate, sodium carbonate and sodium hydroxide as precipitating agents. The co-precipitation process was performed at temperature of over 50°C by continuous magnetic stirring. The precipitates were pre-sintered at 850°C in air. Dilatometric study has revealed that lowest shrinkage (only 5.6%) showed a material obtained from an oxalate precipitant. After pressing and high-temperature sintering at 1325°C, it showed both insufficient density and the presence of pores, which contribute to the deterioration in the magnetic properties of the ferrites: the low magnetic permeability value and high magnetic losses. Ferrite prepared from hydroxide and carbonate precipitant showed a much higher shrinkage, sintered density and much higher magnetic permeability compared with the ferrite prepared from oxalate precursor.

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Low-temperature synthesis and characterization of the Mn–Zn ferrite

Cited by 23 publications

References 22 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

Mg–Zn and Mn–Zn Ferrites Derived from Coil Core Materials as New Phenol Methylation Catalysts

The study of thermal, microstructural and magnetic properties of manganese–zinc ferrite prepared by co-precipitation method using different precipitants

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