Goswami, R and Chakravartty, S C and Krishna, J B M and Bose, E and Das, D and Chaudhury, S K and Mukherjee, S and Saha, P and Mukherjee, U and Das, Probal Kumar and Banerjee, Rajat (2011) AC conductivity and dielectric analysis of graphite–clay nanocomposite. Canadian Journal of Physics, 89 (12). pp. 1255-1260. ISSN 0008-4204

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Abstract

A number of graphite–clay composites with varying percentages of graphite in the clay host have been prepared and their AC conductivities and dielectric behaviours have been studied in the frequency range from 42 Hz to 5 MHz. Measurements have been done for various concentrations of graphite filler to characterize their behaviour and develop composites with the desired conductivity for possible practical applications. The AC conductivity, σ(ω), increased with ω and followed a power law σ(ω) ωs with s ≤ 1, signifying conduction by hopping mechanism. The dielectric behaviour and loss tangents of the samples have been characterized by loss peaks for all of the samples, suggesting the presence of relaxation dipoles. The broad asymmetric loss peaks of the dielectric response were analyzed using the Havriliak–Negami function and associated parameters relaxation time, τ; broadening, γ; and asymmetry, β, have been obtained.

Item Type:	Article
Subjects:	Structural Clay Products
Divisions:	Non-Oxide Ceramics & Composites
Depositing User:	Bidhan Chaudhuri
Date Deposited:	07 Aug 2012 06:47
Last Modified:	29 Mar 2016 07:02
URI:	http://cgcri.csircentral.net/id/eprint/1724

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