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      https://www.ias.ac.in/article/fulltext/boms/035/02/0197-0202

    • Keywords

       

      Dielectric; piezoelectric; diffuse phase transition; optical study.

    • Abstract

       

      Bismuth sodium titanate, Bi0.5Na0.5TiO3 (BNT) is considered to be an excellent candidate for a key material of lead-free dielectric ceramics. In this study, we propose the dielectric and optical study of single phase BNT powder prepared by solid-state reaction route. The phase formation and structural study were done by X-ray diffraction (XRD) which shows well developed crystallite with a pure perovskite phase. The ceramic was sintered at different temperatures from 1050°C to 1175°C to study the effect of sintering temperature on the morphology and density. It was found that the sample sintered at 1150°C shows the highest density. The microstructure of the ceramic was investigated by scanning electron microscopic (SEM) technique. The temperature-dependent dielectric study of the sample sintered at 1150°C was done in the frequency range of 50 kHz–1 MHz which shows a diffuse phase transition. The piezoelectric constant (𝑑33) was found to be 41 pCN-1. The P–E hysteresis loop confirms the ferroelectric behaviour in the ceramic. The UV–Vis spectrum indicated that the Bi0.5Na0.5TiO3 ceramic has an optical band gap of 2.94 eV.

    • Author Affiliations

       

      B Parija1 T Badapanda2 V Senthil1 S K Rout3 S Panigrahi1

      1. Department of Physics, National Institute of Technology, Rourkela 769 008, India
      2. Department of Physics, C V Raman College of Engineering, Bhubaneswar 752 054, India
      3. Department of Applied Physics, Birla Institute of Technology, Mesra, Ranchi 835 215, India
    • Dates

       
  • Bulletin of Materials Science | News

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