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Ferroelectric studies and impedance analysis of PLZT (10/52/48) electroceramics

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Abstract

Perovskite Pb0.90La0.10(Zr0.52Ti0.48)O3 ceramic material was prepared through sol–gel process. Structural, phase formation and thermal properties were confirmed by X-ray diffraction, thermogravimetry and differential thermal analysis; size and microstructural study was carried out using particle size analyser and scanning electron microscope. The electrical properties of the ceramics were investigated as a function of both temperature (from room temperature to 500 °C) and frequency (from 100 Hz to 1 MHz) using complex impedance spectroscopy (CIS). The impedance spectrum results indicate the decrease in dielectric constant with increase in frequency while the dielectric loss increases with frequency. The activation energy of the sample was calculated from the slope of the Arrhenius plot as 0.129 eV from the Arrhenius’s plot of dc conductivity versus inverse of absolute temperature. The dc conductivity was obtained from CIS measurements and the activation energy. The remnant polarization (Pr) and coercive electric fields (Ec) are found out as 6.52 μC/cm2 and 2.55 kV/cm from the ferroelectric loop measured at room temperature.

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Acknowledgments

The authors acknowledge Prof. M. S. Ramachandra Rao, Department of Physics, IIT Madras and DST Government of India for funding through research projects (Project No: PHY/06-07/187/DSTX/MSRA & SR/FTP/ETA-11/08).

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Authors and Affiliations

  1. Department of Physics, B. S. Abdur Rahman University, Vandalur, Chennai, 600 048, Tamilnadu, India

    M. Prabu & I. B. Shameem Banu

  2. Material Science Research Center, Indian Institute of Technology Madras, Chennai, 600 036, Tamilnadu, India

    D. Kannan

  3. Department of Nanotechnology, School of Interdisciplinary Courses, Noorul Islam Centre for Higher Education, Kumaracoil, 629 180, Tamilnadu, India

    S. Gobalakrishnan & Murthy Chavali

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  1. M. Prabu
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  2. I. B. Shameem Banu
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Correspondence to M. Prabu.

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Prabu, M., Shameem Banu, I.B., Kannan, D. et al. Ferroelectric studies and impedance analysis of PLZT (10/52/48) electroceramics. J Mater Sci: Mater Electron 24, 1556–1561 (2013). https://doi.org/10.1007/s10854-012-0972-6

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