Impedance spectroscopy study of Pb2P2O7 compound

Ionics - Tập 17 - Trang 223-228 - 2011
Haibado Mahamoud1, Bassem Louati1, Faouzi Hlel1, Kamel Guidara1
1Laboratoire de L’Etat Solide, Faculté des Sciences de Sfax, University of Sfax, Sfax, Tunisia

Tóm tắt

The lead pyrophosphate, Pb2P2O7, compound was prepared by conventional solid-state reaction and identified by X-ray powder diffractometer. Pb2P2O7 has a triclinic structure whose electrical properties were studied using impedance spectroscopy technique. Both impedance and modulus analysis exhibit the grain and grain boundary contribution to the electrical response of the sample. The temperature dependence of the bulk and grain boundary conductivity were found to obey the Arrhenius law with activation energies E g = 0.66 eV and E gb = 0.67 eV, respectively. The scaling behavior of the imaginary part of the complex impedance suggests that the relaxation describes the same mechanism at various temperatures.

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