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    • Impedance and a.c. conductivity studies on Ba(Nd0.2Ti0.6Nb0.2)O3 ceramic prepared through conventional and microwave sintering route

      Syed Mahboob G Prasad G S Kumar

      Ceramics and Glasses Volume 29 Issue 4 August 2006 pp 347-355

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/029/04/0347-0355

    • Keywords

       

      Barium titanate; impedance; grain/grain boundary resistance and capacitance; grain/grain boundary relaxation frequency; electrical conductivity; hopping mechanism.

    • Abstract

       

      Electrical conduction studies on Ba(Nd0.2Ti0.6Nb0.2)O3 ceramic samples prepared through conventional and microwave sintering route are presented in this paper. D.C. and a.c. conductivities of these samples as a function of temperature from 300–900 K have been studied. Two types of conduction processes are evident from the frequency dependant conductivity plots, i.e. low-frequency conduction due to short-range hopping and high-frequency conduction due to the localized relaxation (reorientational) hopping mechanism. Grain and grain boundary contributions to the conductivity in these samples are obtained from impedance/admittance measurements via equivalent circuit modelling.

    • Author Affiliations

       

      Syed Mahboob1 G Prasad1 G S Kumar1

      1. Department of Physics, Osmania University, Hyderabad 500 007, India

    • Dates

       
      Published
      August 2006
      Manuscript received
      7 October 2005
      Manuscript revised
      9 May 2006

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