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    • Keywords


      Equivalent circuit; electrical modulus; a.c. conductivity; hopping mechanism.

    • Abstract


      The Na2ZnP2O7 compound was obtained by the conventional solid-state reaction. The sample was characterized by X-ray powder diffraction, infrared analysis and electrical impedance spectroscopy. The impedance plots show semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. The circuits consist of the parallel combination of bulk resistance 𝑅p and constant phase elements CPE. Dielectric data were analyzed using complex electrical modulus 𝑀* for the sample at various temperatures. The frequency dependence of the conductivity is interpreted in terms of Jonscher’s law. The conductivity 𝜎d.c. follows the Arrhenius relation. The near value of activation energies obtained from the analysis of 𝑀'' and conductivity data confirms that the transport is through ion hopping mechanism, dominated by the motion of the Na+ ions in the structure of the investigated materials.

    • Author Affiliations


      S Chouaib1 A Ben Rhaiem1 K Guidara1

      1. Laboratoire de L’Etat Solide, Faculté des Sciences, de Sfax-BP 1171-3000 Sfax, Tunisia
    • Dates

  • Bulletin of Materials Science | News

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