Nanosized zinc and magnesium ferrites obtained from PVA–metal nitrates’ solutions

Stoia, Marcela; Barbu–Tudoran, Lucian; Barvinschi, Paul

doi:10.1007/s10973-012-2888-z

Cited by 13 publications

(9 citation statements)

References 18 publications

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“…This confirms the earlier results, i.e., the formation of ferrite after gel combustion. When the mixture of citric acid (CA) and EDTA is used as the fuel, additional absorption peaks appear in the FTIR spectra at 3500 cm 1384 and 1598 cm -1 are characteristic of the multidentate type of coordination [25,31]. When glycine or citric acid is used as the fuel (Fig.…”

Section: Resultsmentioning

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: Resultsmentioning

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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“…The method involved in this work insures the in situ formation of a mixture of carboxylate compounds of the two involved metal cations. As a result of the redox reaction between the polyol (reducing agent) and the mixture of metal nitrates, a more homogenous mixture of the two oxide precursor [23], or even heteropolynuclear carboxylates [24] are obtained. Our previous work on iron oxide synthesis through this method showed that iron(III) forms coordination compounds with the carboxylate ions resulted from ethylene glycol and 1,2propanediol oxidation by nitrate ions [25].…”

Section: Resultsmentioning

confidence: 99%

“…Our previous work on iron oxide synthesis through this method showed that iron(III) forms coordination compounds with the carboxylate ions resulted from ethylene glycol and 1,2propanediol oxidation by nitrate ions [25]. Like other divalent ions [23], Mn(II) does not react with polyols up to 150°C, but it reacts at a higher temperature with partial burning of the formed carboxylate, as we have previously shown for the interaction of manganese nitrate with PVA [26]. When the divalent cation (Mn(II)) is mixed with a trivalent cation (Fe(III)), the redox reaction of M III (NO 3 ) 3 with the diol, promotes also the redox reaction of M II (NO 3 ) 2 , leading to a mixture of M(III) and M(II) carboxylates [26].…”

Section: Resultsmentioning

confidence: 99%

“…Up to 120°C, two exothermic effects are evidenced on the DSC curve (a small one at 80°C and a stronger one at 100°C), accompanied with 39 % mass loss on TG curve, overlapped with the endothermic effect of water evaporation. These exothermic effects can be assigned to the redox reactions of Fe(III) nitrate and Mn(II) nitrate with PVA [23,26]. As a result of the redox reaction between PVA and nitrates ions, the former gets oxidized to carboxylic acids, which coordinates to the Mn(II) and Fe(III) cations, forming a mixture of carboxylates [26].…”

Section: Resultsmentioning

confidence: 99%

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Thermoanalytical techniques

Stoia

Păcurariu

Istratie

et al. 2016

J Therm Anal Calorim

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Thermal analysis and FTIR spectroscopy were used to investigate the formation and thermal decomposition of several manganese ferrite precursors, obtained in the interaction between a mixture of manganese(II) nitrate and iron(III) nitrate (molar ratio 1:2) and different polyols/ polyvinyl alcohol, 1,2-propanediol, and ethylene glycol, naked or embedded in silica gel. All prepared precursors consisted in mixture of Mn(II) and Fe(III) carboxylates, obtained through the polyol oxidation by nitrates ions. Similar manganese ferrite precursors were obtained in silica gel also. By the thermal decomposition of the naked precursors, manganese ferrite was obtained at 300 and 400°C, as fine nanoparticles, with diameters up to 15 nm. Above 400°C, the manganese ferrite has begun to decompose, due to the Mn(II) oxidation to Mn(III). At 700°C, only crystalline phases containing Mn(III) were evidenced in the XRD patterns. In case of the precursors embedded in silica gel, their thermal decomposition took place at higher temperatures. Manganese ferrite was partially stabilized by the silica matrix. Thus, manganese ferrite was present in silica matrix, even at 1000°C, with bixbyite (FeMnO 3 ) impurities. Pure manganese ferrite embedded in silica matrix was obtained in all cases, after annealing the powders obtained at 400°C, in argon atmosphere, at 1000°C. The magnetic behavior of the manganese ferrite/silica nanocomposites obtained at 1000°C in air and in argon was superparamagnetic, with maximum magnetization values of 25 emu g -1 .

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“…Because of low value of resistivity of MnZn ferrites as compared to NiZn ferrites, these ferrites are used for low frequency applications [76][77][78]. The properties of MnZn ferrites are essentially dependent on the synthesis methods [55,[79][80][81][82][83][84][85] and the doping concentrations inside nanoferrites [86,87].…”

Section: Introductionmentioning

confidence: 99%

A review on MnZn ferrites: Synthesis, characterization and applications

Thakur

Chahar

Taneja

et al. 2020

Ceramics International

271

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Researchers are taking great interest in the synthesis and characterization of MnZn ferrites due to their wide range of applications in many areas. MnZn ferrites are a class of soft magnetic materials that have very good electrical, magnetic and optical properties. The properties of MnZn ferrites include high value of resistivity, permeability, permittivity, saturation magnetization, low power losses and coercivity. The above mentioned advantageous features of MnZn ferrites make them suitable for the use in various applications. In biomedical field these ferrites are used for cancer treatment and MRI. MnZn ferrites are also used in electronic applications for making transformers, transducers and inductors. These ferrites are also used in magnetic fluids, sensors and biosensors. MnZn ferrite is highly useful material for several electrical and electronic applications. It finds applications in almost every household appliances like mobile charger, LED bulb, TV, refrigerator, juicer mixer, washing machine, iron, microwave oven, mobile, laptop, desktop, printer and so on. Therefore, the present review focuses on different techniques for synthesis of MnZn ferrites in literature, their characterization tools, effect of doping on the properties of MnZn ferrite and finally we will discuss about their applications.

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Nanosized zinc and magnesium ferrites obtained from PVA–metal nitrates’ solutions

Cited by 13 publications

References 18 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

Thermoanalytical techniques

A review on MnZn ferrites: Synthesis, characterization and applications

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