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HomeKey Engineering MaterialsKey Engineering Materials Vols. 510-511Structural, Electrical and Dielectric Properties...

Structural, Electrical and Dielectric Properties of Nanocrystalline Mg-Zn Ferrites

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Abstract:

The nanocrystalline Mg-Zn ferrites having general formula Mg_1-xZn_xFe₂O₄ (x=0, 0.1, 0.2, 0.3, 0.4, 0. 5) were prepared by WOWS sol-gel route. All prepared samples were sintered at 700°C for 2 h. X-ray powder diffraction (XRD) technique was used to investigate structural properties of the samples. The crystal structure was found to be spinel. The crystallite size, lattice parameters and porosity of samples were calculated by XRD data analysis as function of zinc concentration. The crystallite size for each sample was calculated using the Scherrer formula considering the most intense (3 1 1) peak and the range obtained was 34-68 nm. The dielectric constant (ε), dielectric loss tangent () and AC electrical conductivity of nanocrystalline Mg-Zn ferrites are investigated as a function of frequency. The dielectric constant (ε), dielectric loss tangent () increased with increase of Zn concentration. All the electrical properties are explained in accordance with MaxwellWagner model and Koops phenomenological theory.

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Advanced Materials XII

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Periodical:

Key Engineering Materials (Volumes 510-511)

Pages:

51-57

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.510-511.51

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Online since:

May 2012

Authors:

Muhammad Anis-ur-Rehman, M.A. Malik, S. Nasir, M. Mubeen, K. Khan, Asghari Maqsood

Keywords:

AC Conductivity, Crystallite Size, Dielectric Constant, Porosity, X-Ray Diffraction (XRD)

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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