• Preparation and characterization of niobates. Part VI: Synthesis, XRD, SEM and piezoelectric studies of potassium and barium-doped lead strontium niobates

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    • Keywords


      Niobates; SEM; piezoelectric properties; doping of cations; grain size; dielectric constant

    • Abstract


      Lead niobates belong to orthorhombic symmetry and acquire tetragonal symmetry at 570°C. Some lead-based ceramic compounds have been synthesized and their structural and ferroelectric properties studied. Strontium, barium and potassium were used to reduce the transition temperature and to control the grain growth, thereby electrical properties. The transition temperature was found to decrease from 465°C to 282°C with dopants. The transition temperature was drastically reduced with the addition of barium. This can be attributed to the suitability of doping ion in determining the transition temperature and other piezoelectric constants. Powder X-ray diffraction studies were carried out and orthorhombic symmetry was confirmed. The lattice constants were calculated through diffraction patterns. The average grain size was measured from the scanning electron microscopy (SEM) pictures taken on fractured surfaces of the samples.

    • Author Affiliations


      K Umakantham1 2 G Nageswara Rao1

      1. Department of Inorganic Chemistry, Andhra University, Visakhapatnam - 530 003, India
      2. Department of Physics, Andhra University, Visakhapatnam - 530 003, India
    • Dates

  • Bulletin of Materials Science | News

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