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<p>Dielectric materials are widely used in high-energy storage devices as an essential component of electronic capacitors. While a high pyroelectric coefficient caused by high remnant polarization (P<sub>r</sub>) can restrict their superior and wider energy storage performance. Here, (0.8-x)(Na<sub>0.5</sub>Bi<sub>0.5</sub>)TiO<sub>3</sub>-0.2SrTiO<sub>3</sub>-xBaTiO<sub>3</sub> (NBSTBx) (x = 0.0, 0.05, 0.1, and 0.15) ceramic materials prepared by the solid solution method were targeted to undergo the idea of present research. The crystal lattice symmetry increased as configurational entropy (ΔS) increased, resulting in the disrupting of ferroelectricity long-range order of NBT-ST ceramic. Two exclusive dielectric anomalies accompanying large-temperature nanoregions (PNRs) in the ergodic relaxor (ER) case and short-temperature PNRs in the nonergodic relaxor (NR) case are recognized at x &lt; 0.1. The highest activation energy (Ea = 0.098&#xa0;eV) was achieved at 0.1 of BT, which denotes low coupling between polar clusters, resulting in intriguing to establish ordered polarized zones with large polarization. The pyroelectric parameter (PE) was evaluated by an approximately numeric technique through differentiating remnant polarization P<sub>r</sub> as a function of temperature. The suppression of PE was achieved at NBSTB<sub>0.1</sub> sample close to the phase transition temperature. However, high figure of merit coefficient (FOM = 7.9 × 10<sup>− 9</sup> C.cm<sup>− 2</sup>.°C<sup>− 1</sup>) was achieved at T = 180&#xa0;°C indicating the material is suitable for pyroelectric applications at high T. The present work shows a good paradigm for enhancing the energy storage performance of NBT ceramics via suppression of pyroelectric characteristics to converge the demanding requirements of energy storage applications.</p>

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Optimizing energy storage and pyroelectric characteristics through A-site disorder in (Bi0.5Na0.5)TiO3 – based ceramics

  • 期刊论文

  • 发表日期：

    2025年10月13日

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  • Karam S. El-Nasser,
  • Ebtsam K. Alenezy,
  • Mohamed S. Massoud,
  • Eid Eissa Salama,
  • Ibrahim O. Ali,
  • K. A. Aly,
  • Amira A. Kamal,
  • Abd El-razek Mahmoud

摘要

Dielectric materials are widely used in high-energy storage devices as an essential component of electronic capacitors. While a high pyroelectric coefficient caused by high remnant polarization (Pr) can restrict their superior and wider energy storage performance. Here, (0.8-x)(Na0.5Bi0.5)TiO3-0.2SrTiO3-xBaTiO3 (NBSTBx) (x = 0.0, 0.05, 0.1, and 0.15) ceramic materials prepared by the solid solution method were targeted to undergo the idea of present research. The crystal lattice symmetry increased as configurational entropy (ΔS) increased, resulting in the disrupting of ferroelectricity long-range order of NBT-ST ceramic. Two exclusive dielectric anomalies accompanying large-temperature nanoregions (PNRs) in the ergodic relaxor (ER) case and short-temperature PNRs in the nonergodic relaxor (NR) case are recognized at x < 0.1. The highest activation energy (Ea = 0.098 eV) was achieved at 0.1 of BT, which denotes low coupling between polar clusters, resulting in intriguing to establish ordered polarized zones with large polarization. The pyroelectric parameter (PE) was evaluated by an approximately numeric technique through differentiating remnant polarization Pr as a function of temperature. The suppression of PE was achieved at NBSTB0.1 sample close to the phase transition temperature. However, high figure of merit coefficient (FOM = 7.9 × 10− 9 C.cm− 2.°C− 1) was achieved at T = 180 °C indicating the material is suitable for pyroelectric applications at high T. The present work shows a good paradigm for enhancing the energy storage performance of NBT ceramics via suppression of pyroelectric characteristics to converge the demanding requirements of energy storage applications.