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      https://www.ias.ac.in/article/fulltext/boms/027/06/0547-0553

    • Keywords

       

      Pb2Sb3LaTi5O18; impedance; phase transition; dielectric constant; orthorhombic structure.

    • Abstract

       

      Polycrystalline sample of Pb2Sb3LaTi5O18, a member of tungsten–bronze (TB) family, was prepared using a high temperature solid-state reaction technique. XRD analysis indicated the formation of a singlephase orthorhombic structure. The dielectric studies revealed the diffuse phase transition and the transition temperature was found to be at 52°C. Impedance plots were used as tools to analyse the sample behaviour as a function of frequency. Cole–Cole plots showed Debye relaxation. The activation energy was estimated to be 0.634 eV from the temperature variation of d.c. conductivity. The nature of variation of d.c. conductivity with temperature suggested NTCR behaviour.

    • Author Affiliations

       

      C K Suman1 K Prasad1 R N P Choudhary2

      1. University Department of Physics, T.M. Bhagalpur University, Bhagalpur 812 007, India
      2. Department of Physics & Meteorology, Indian Institute of Technology, Kharagpur 721 302, India
    • Dates

       
  • Bulletin of Materials Science | News

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