Dielectric Behaviour of Nanocrystalline Ni-Zn Ferrites Prepared by Oxalate Co-Precipitation Method

Abstract:

Nickel–zinc ferrites with chemical formula Ni1-xZnxFe2O4 (x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0) were prepared by oxalate co-precipitation method. The dielectric constant (ε') dielectric loss (tanδ) and AC conductivity (σac) of all the samples were determined at room temperature in the frequency range 20Hz -1MHz. The dielectric constant and dielectric loss are much smaller than those for samples prepared by ceramic method. The dielectric behaviour is attributed to the Maxwell–Wagner type interfacial polarization. AC conductivity of all the samples lies in the range 1.20×10-8 to 54.7×10-8 Ω-1cm-1. Low dielectric loss and high resistivity suggest the suitability of these ferrites for high frequency applications.

• Periodical: Advanced Materials Research (Volume 645)
• Pages: 56-59
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.645.56
• Online since: January 2013
• Authors: Shinde J. Tukaram, Gadkari B. Ashok, Vasambekar N. Pramod
• Keywords: AC Conductivity, Dielectric Constant, Dielectric Loss, Nanostructure, Ni-Zn Ferrites

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DOI: 10.1007/bf02707892