• Studies of structural and dielectric properties of Ba5BiTi3Nb7O30 ceramics

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    • Keywords


      Tungsten bronze structure; X-ray diffraction; dielectric constant; phase transition

    • Abstract


      The polycrystalline samples of Ba5BiTi3Nb7O30 (hereafter BBTN) belonging to ferroelectric oxide family of tungsten bronze structure were prepared by high temperature solid-state reaction method. Preliminary X-ray analysis of the samples provided the lattice parametersa=11·9331 Å,b=14·9684 Å, andc=7·0193 Å, and also formation of a single-phase orthorhombic structure at room temperature (303 K). Detailed studies of dielectric constant (ε) and loss (tanδ) as a function of frequency (500 Hz to 10 KHz) at room temperature and also as a function of temperature (liquid nitrogen to 160°C) show the dielectric anomaly and structural phase transition at 16·8°C.

    • Author Affiliations


      H Sharma1 Kiran Kumari1 2 S N Giri1

      1. Department of Physics, Veer Kunwar Singh University, Arrah - 802 301, India
      2. Department of Physics, Dr S K S M College, Motihari - 845 401, India
    • Dates

  • Bulletin of Materials Science | News

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