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    • Keywords


      BaTiO3 nanoparticles; XRD; SEM; TEM; DLS; dielectric constant.

    • Abstract


      A new sol-precipitation technique for the preparation of nano BaTiO3 crystallite has been developed by reacting 0.2 M each of Ti(IV) triethanolaminato isopropoxide and hydrated barium hydroxide in methanol such that the molar ratio of Ba : Ti is 1.02 at 80 °C under stirring (1200 rpm) for one hour in alkaline media using tetra methyl ammonium hydroxide (TMAH). It was calcined at 100 °C for 12 h. Structural and compositional properties were investigated by XRD, SEM, EDX, TEM, SAED and DLS techniques. FT–IR and TG–DTA were used to characterize its purity and the thermal stability. The BaTiO3 particles prepared were found to be spherical, homogeneous and cubic in structure. The particle size was found to be 23–31 nm. The dielectric constant and dissipation factor after sintering at 400 °C were 5379 and 0.63, respectively at 100 Hz frequency. The a.c. conductivity (𝜎a.c.) was found to be 2 × 10-5 S-cm-1 at room temperature (30 °C). It increased with increasing temperature up to 50 °C and decreased with further increase in temperature. The impedance was 3.37 × 105 ohms at room temperature. It decreased with increasing frequency.

    • Author Affiliations


      Ravindra H Upadhyay1 Anant P Argekar2 Rajendra R Deshmukh1

      1. Physics Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
      2. Department of Chemistry, Institute of Science, Fort, Mumbai 400 032, India
    • Dates

  • Bulletin of Materials Science | News

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      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

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      Posted on July 25, 2019

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