Structural and electrical properties of Ni1−xMgxFe2O4 synthesized by citrate gel process

Berchmans, L. John; Selvan, R. Kalai; Kumar, Pawan; Augustin, C.O.

doi:10.1016/j.jmmm.2004.01.073

Cited by 178 publications

(69 citation statements)

References 33 publications

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“…The tetrahedral sites are four-fold coordinated, whereas the octahedral sites are six-fold coordinated by oxygen. Each anion is coordinated by one A-site Several researchers thoroughly investigated magnesium containing ferrite compositions [4,5]. The site occupancy of magnesium was also discussed to some extent, but the exact amount of magnesium occupancy has not been well investigated in terms of complete structural parameters.…”

Section: Introductionmentioning

confidence: 99%

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Prasad

Babu²,

Prasad

2015

Materials Science-Poland

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Polycrystalline ferrites having the chemical formula Ni 0.65−x Zn 0.35 Mg x Fe 2 O 4 (0 x 0.2) were prepared by solid state reaction route in steps of x = 0.04. The effect of incorporation of diamagnetic divalent magnesium at expense of nickel on the structural properties of these ferrites has been studied. The proposed cation distribution was derived from theoretical X-ray diffraction intensity calculations. These intensity calculations were done by varying the concentration of magnesium ions over two sites in the lattice. For a certain amount of magnesium concentration, the calculated and observed X-ray diffraction intensities were found to be in good agreement. Site occupancy of divalent diamagnetic magnesium was established from this cation distribution. The octahedral environment facilitates magnesium to enter the B-site at about 95 % and the remaining 5 % occupy tetrahedral sites (A-sites). The movements of cations between tetrahedral and octahedral sites as a result of magnesium substitution were discussed in the view of structural parameters, such as tetrahedral and octahedral bond lengths, cation-cation and cation-anion distances, bond angles and hopping lengths, which were calculated using experimental lattice constants and oxygen parameters. All structural parameters showed slight deviations from ideal values. Among all magnesium substituted samples, the ones with x = 0.12 exhibited insignificant variation in view of structural properties. Dielectric measurements were conducted at a standard frequency of 1 kHz. Large values of the recorded dielectric constants displayed typical characteristics of bulk ferrites. Both dielectric constant and loss values showed mixed variations, attributed to the loss of zinc ions during the sintering process.

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Section: Introductionmentioning

confidence: 99%

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Prasad

Babu²,

Prasad

2015

Materials Science-Poland

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“…. From the figure we find that with the increase of Sn concentration (x), lattice parameters are increasing linearly [17], which shows that the variation of tetrahedral radius with increasing Sn concentration. 5 increase of the ionic radius.…”

Section: X-ray Diffractionmentioning

confidence: 79%

Effect of Sn (Tin) Alloying on Ni-Zn Ferrites Characteristics

Mahmud¹,

Mahmud²,

Sabikun³

2016

IJAMSE

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“…When dissolved in water, FeSO 4 will undergo oxidation and hydrolysis reactions which can be described as equation (1). Oxygen in equation (1) comes from the dissolved O 2 in water.…”

Section: Resultsmentioning

confidence: 99%

“…These properties make them much suitable for microencapsulation, drug delivery, magnetic separation [1][2][3], etc. As an important category of magnetic hollow structured ferrites, spinel structured ferrites (MFe 2 O 4 , M =Zn, Mg, Co, Ni, Cd) hollow spheres have been reported to be synthesized through a two-steps template method [4,5], where microspheres such as carbonaceous saccharide microspheres and carbon microspheres are used as templates.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of MnFe₂O₄ hollow microspheres via a sacrificial templates approach

Zhang

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Structural and electrical properties of Ni1−xMgxFe2O4 synthesized by citrate gel process

Cited by 178 publications

References 33 publications

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Effect of Sn (Tin) Alloying on Ni-Zn Ferrites Characteristics

Synthesis of MnFe₂O₄ hollow microspheres via a sacrificial templates approach

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Structural and electrical properties of Ni1−xMgxFe2O4 synthesized by citrate gel process

Cited by 178 publications

References 33 publications

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Structural and dielectric studies of Mg2+ substituted Ni–Zn ferrite

Effect of Sn (Tin) Alloying on Ni-Zn Ferrites Characteristics

Synthesis of MnFe2O4 hollow microspheres via a sacrificial templates approach

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Synthesis of MnFe₂O₄ hollow microspheres via a sacrificial templates approach