Microwave-flash combustion synthesis of Ni0.8Zn0.2Fe2O4 and its dielectric characterization

Mangalaraja, Ramalinga Viswanathan; Ananthakumar, S.; Manohar, P.; Gnanam, F. D.; Awano, Masanobu

doi:10.1016/j.matlet.2003.10.032

Cited by 23 publications

(9 citation statements)

References 20 publications

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“…According to him sintered density of Mn-Zn ferrite is 4800 kg/m 3 and porosity is 8%, whereas in view of Mangalaraya [3], typical porosity range for ferrites is 7-25%.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis of the Mn–Zn ferrites using XRD technique

Ghazanfar

Siddiqi

Abbas³

2005

Materials Science and Engineering: B

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“…According to him sintered density of Mn-Zn ferrite is 4800 kg/m 3 and porosity is 8%, whereas in view of Mangalaraya [3], typical porosity range for ferrites is 7-25%.…”

Section: Introductionmentioning

confidence: 99%

Structural analysis of the Mn–Zn ferrites using XRD technique

Ghazanfar

Siddiqi

Abbas³

2005

Materials Science and Engineering: B

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“…The small amount of zinc evaporation at higher temperature does not affect the sintered density of ferrites. It is also observed that the density of ferrite under investigation is higher than reported values of ferrite prepared by oxalate precipitation, ceramic and flash combustion method [33,35,36]. This suggests that microwave sintering favors higher densification and more compaction.…”

Section: Lattice Parameter Bulk Density and Porosity Of The Ni 1-x Zmentioning

confidence: 65%

Magnetic properties of Ni-Zn ferrites prepared by microwave sintering method

et al. 2011

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The effect of zinc ion substitution for nickel on structural and magnetic properties of NiZn ferrites is reported. The spinel ferrite system Ni 1-x Zn x Fe 2 O 4 with x0 0.2, 0.3, 0.4 and 0.5 was prepared by microwave sintering method. The uniaxially pressed samples were sintered at various temperatures such as 900°C, 1000°C and 1100°C for 30 min. X-ray diffraction patterns of the samples indicate the formation of single-phase cubic spinel structure. SEM micrographs show that grain size increases with increasing zinc content and sintering temperature. The elemental composition of these ferrites was analyzed by EDS. Lattice constant increases with increase in zinc content, obeying Vegard's law. The effect of composition and sintering temperature on initial permeability as the function of frequency and temperature was studied. The initial permeability of NiZn ferrite increases greatly with increasing Zn content and sintering temperature. The dependence of initial permeability with respect to temperature shows the decrease in the Curie point with increase in zinc content, is the normal behavior of ferrites. The relative loss factor ðtan d μ i = Þ of the order of 10 −2 to 10 −5 in the frequency range from 100 Hz to 1 MHz indicates that the prepared ferrites have relatively high purity.

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“…57 The density of material also influences the variation in dielectric losses; for example, high porosity (low density) results in low dielectric constant and higher dielectric losses. 58 The frequency dependence at different temperatures of the loss factor for the two samples is plotted in Fig. 10 .…”

Section: Resultsmentioning

confidence: 99%