Magnetic and dielectric properties of mixed spinel Ni–Zn ferrites synthesized by citrate–nitrate combustion method

Kambale, Rahul C.; Adhate, N.R.; Chougule, B.K.; Kolekar, Y. D.

doi:10.1016/j.jallcom.2009.10.187

Cited by 104 publications

(33 citation statements)

References 34 publications

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“…Sample calcined at 500°C for 30 min showed irregular morphology with large clusters of nano-sized particles below 100 nm (Fig. 4a), with results similar to Jebeli Moeen et al [6] and Kambale et al [26], who used calcination times of 1,000°C for 60 min and 700°C for 120 min, respectively. The micrograph of ferrite Ni 0.75 Zn 0.25 Fe 2 O 4 calcined at 950°C (Fig.…”

Section: Resultssupporting

confidence: 84%

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Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Assis¹,

Bomio²,

Nascimento³

et al. 2014

J Therm Anal Calorim

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Ferrites Ni 0.75 Zn 0.25 Fe 2 O 4 were obtained by polymeric precursor method and calcined in a short time with microwave energy to assess the morphological and microstructural characteristics. Samples were calcined at 500, 650, 800, and 950°C for 30 min in a microwave oven. The resulting powders were characterized by thermal analysis (TG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectrometer, field-emission gun scanning electron microscope (FEG-SEM), and energy-dispersive X-ray spectroscopy. The XRD results showed the formation of single ferrite phase at temperature of 500°C for 30 min. The FEG-SEM analysis showed agglomerated particles with formation of non-dense longitudinal plates, with interparticle porosity and agglomerated fine particles. The rapid calcination by microwave energy demonstrated satisfactory results in relatively low temperature of 500°C for 30 min and appeared to be a promising technique for obtaining nickel-zinc ferrite powders.

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Section: Resultssupporting

confidence: 84%

“…The lattice parameter was calculated using the UnitCell -97 software [25] through refinement from XRD data. The density of the ferrite obtained by XRD was calculated using the following equation [26][27][28]:…”

Section: Resultsmentioning

confidence: 99%

Rapid calcination of ferrite Ni0.75Zn0.25Fe2O4 by microwave energy

Assis¹,

Bomio²,

Nascimento³

et al. 2014

J Therm Anal Calorim

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show abstract

“…Ni-Zn ferrite is a soft magnetic and an important ceramic material which has enormous applications in various fields like electric, magnetic, electronics, microwave devices, catalysts, transformers cores, power conversions, high frequency applications in telecommunications, magnetically control drug delivery system, for multilayer inductor applications, etc [1][2][3][4][5][6][7]. The nanoferrite properties can be easily adjustable, controllable to a great extent by choosing proper preparation methods and suitable doping with divalent, trivalent and rare earth ions [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Dielectric Response of Nix Zn1-x Al Fe O4 Nanoferrites

Donta¹,

Katrapally²,

Pendyala³

2016

NanoWorld J

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Ni-Zn-Al nanoferrites of general formula Ni x Zn 1-x Al Fe O 4 (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) were synthesized by sol-gel auto combustion technique. The X-ray diffraction and FTIR studies confirmed the formation of single cubic spinel structure. Dielectric performance and AC conductivity of prepared mixed nanoferrites were carried out using LCR impedance meter. It was observed that both dielectric constant and dielectric loss were decreased by increasing the frequency whereas AC conductivity increases with applied frequency but decreases with increasing the Ni 2+ ion substitution for a fixed Al 3+ ion concentration. DC resistivity, activation energy and Curie temperature were calculated by using the two probe experimental method. It was observed that DC resistivity decreased whereas the charge mobility increased with increasing the temperature. DC resistivity and activation energy of the nanoferrite samples were increased with Ni 2+ ion substitution for a fixed Al 3+ ion concentration.

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“…The physical properties of the nanomaterials are predominantly controlled by the grain boundaries than by the grains [6]. The nanoparticles of ferrite can be prepared by various techniques such as citrate-nitrate combustion method [7], sol-gel route [8], pulsed laser ablation [9], and solvothermal process [10]. Ferrites, by virtue of their structure can accommodate a variety of cations at different sites enabling of wide variation in the electrical and magnetic properties.…”

Section: Introductionmentioning

confidence: 99%