Impedance spectroscopic studies on NiFe2O4 with different morphologies: Microstructure vs. dielectric properties

Impedance spectroscopic studies on NiFe2O4 with different morphologies: Microstructure vs. dielectric properties

NiFe2O4 powders were prepared by combustion synthesis, polyol-mediated and sol–gel methods. Morphological characterization of sintered disks was carried out using scanning electron microscopy (SEM). Dielectric properties of NiFe2O4 synthesized by different routes were investigated over the frequency...

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Bibliographic Details
Published in:Ceramics international Vol. 39; no. 3; pp. 2309 - 2315
Main Authors: Sudalai Muthu, K., Lakshminarasimhan, N.
Format: Journal Article
Language:English
Published: Elsevier Ltd 01-04-2013
Subjects:
A. Powders: Chemical preparation
B. Electron microscopy
C. Impedance
Combustion synthesis
D. Ferrites
Dielectric properties
Discs
Disks
Frequency ranges
Microstructure
Morphology
Sol gel process
B. Electron microscopy
D. Ferrites
A. Powders: Chemical preparation
C. Impedance
Online Access:Get full text
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Summary:NiFe2O4 powders were prepared by combustion synthesis, polyol-mediated and sol–gel methods. Morphological characterization of sintered disks was carried out using scanning electron microscopy (SEM). Dielectric properties of NiFe2O4 synthesized by different routes were investigated over the frequency range of 100Hz–5MHz at room temperature. A difference in dielectric constant (εr) and dissipation factor (tanδ) of NiFe2O4 samples obtained by different synthesis methods has been observed. The observed dissimilarity in the behavior originates from the variation in the microstructure of the samples that is evident in the Cole–Cole plot results.
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ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2012.08.078