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Investigation of the Effects of Reduced Sintering Temperature on Dielectric, Ferroelectric and Energy Storage Properties of Microwave-Sintered PLZT 8/60/40 Ceramics

Author

Listed:
  • Ajeet Kumar

    (School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Korea
    Ceramics and Composites Group, Defence Metallurgical Research Laboratory, Hyderabad 500058, India)

  • Sivanagi Reddy Emani

    (Advanced Centre of Research in High Energy Materials, School of Physics, University of Hyderabad, Hyderabad 500046, India)

  • K. C. James Raju

    (School of Physics, University of Hyderabad, Hyderabad 500046, India)

  • Jungho Ryu

    (School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Korea)

  • A. R. James

    (Ceramics and Composites Group, Defence Metallurgical Research Laboratory, Hyderabad 500058, India)

Abstract

In this study, (Pb 0.92 La 0.08 ) (Zr 0.60 Ti 0.40 ) O 3 (PLZT 8/60/40) ceramics were synthesized using a high-energy ball-milling technique followed by microwave sintering at different temperatures from 900 °C to 1200 °C. The optimal microwave sintering temperature for the PLZT 8/60/40 ceramics was found to be 1150 °C, which is relatively low compared with conventional sintering temperature. The sintered ceramics show the pure perovskite phase, uniform grain microstructure (1.2 µm) and high density (~99.5%). The polarization vs. electric field ( P-E ) hysteresis curves were used to investigate the ferroelectric and energy storage properties. The switching characteristic in P-E loops and occurrence of domain switching current in current vs. electric field ( I-E ) loops confirms their ferroelectric nature. The PLZT ceramics, which were sintered at 1150 °C, show the highest remnant polarization ( P r ) of ~32.18 μC/cm 2 and domain switching current ( I max ) of ~0.91 mA with a low coercive field ( E c ) of ~10.17 kV/cm. The bipolar and unipolar strain vs. electric field ( S-E ) hysteresis loops were also measured and the highest unipolar strain was found to be ~0.26% for the PLZT ceramics sintered at 1150 °C. The unipolar S-E curves were used to derive the piezoelectric coefficient ( d 33 ~495 pm/V) and a strain hysteresis loss (~5.8%).

Suggested Citation

  • Ajeet Kumar & Sivanagi Reddy Emani & K. C. James Raju & Jungho Ryu & A. R. James, 2020. "Investigation of the Effects of Reduced Sintering Temperature on Dielectric, Ferroelectric and Energy Storage Properties of Microwave-Sintered PLZT 8/60/40 Ceramics," Energies, MDPI, vol. 13(23), pages 1-17, December.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:23:p:6457-:d:457895
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    References listed on IDEAS

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    1. Ajeet Kumar & V. Bhanu Prasad & K. James Raju & A. James, 2015. "Optimization of poling parameters of mechanically processed PLZT 8/60/40 ceramics based on dielectric and piezoelectric studies," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 88(11), pages 1-9, November.
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