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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/025/02/0133-0136

    • Keywords

       

      Tungsten bronze(TB) strucutre; X-ray diffraction; dielectric constant; phase transition.

    • Abstract

       

      The polycrystalline samples of Ca4Bi2Ti4Nb6O30 (herein designated CBTN) were synthesized by the conventional ceramic method. Preliminary X-ray structural study of the compound showed the formation of a single phase solid solution having orthorhombic structure in the paraelectric phase. Measurements of the dielectric constant (𝜀') and dielectric loss (tan 𝛿) as a function of temperarure (-180-200°C) at 1 kHz and 10 kHz and also as a function of frequency (102 Hz to 104 Hz) at five different temperatures [-180°C, -40°C, -10°C, 26°C (room temperature) and 75°C] have shown a dielectric anomaly and a phase transition at -13 ± 1°C in CBTN.

    • Author Affiliations

       

      H Sharma1 Kiran Kumari2 L S Singh1 R N P Choudhary3

      1. University Department of Physics, Veer Kunwar Singh University, Arrah 802 301, India
      2. Department of Physics, R N College, Hajipur 844 101, India
      3. Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur 721 302, India

    • Dates

       
      Published
      April 2002
      Manuscript received
      21 December 2000
      Manuscript revised
      16 January 2002

  • Bulletin of Materials Science | News

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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

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