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<p>Dielectric ceramic capacitors have received a great deal of attention. In this work, (1-<i>x</i>)[0.92Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-0.08(0.5Ca<sub>0.3</sub>Ba<sub>0.7</sub>TiO<sub>3</sub>-0.5BaTi<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>3</sub>)]-<i>x</i>NaNbO<sub>3</sub> ceramics were prepared. The breakdown electric field of the ceramics is significantly enhanced, thanks to the rational two-phase (<i>P</i>4bm and <i>R</i>3c) coexistence structure and introduction of NaNbO<sub>3</sub>. As a result, a recoverable energy storage density (<i>W</i><sub><i>r</i></sub>) of 3.7&#xa0;J/cm<sup>3</sup> and an efficiency (<i>η</i>) of 84.8% are achieved in 0.88[0.92Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-0.08(0.5Ca<sub>0.3</sub>Ba<sub>0.7</sub>TiO<sub>3</sub>-0.5BaTi<sub>0.8</sub>Zr<sub>0.2</sub>O<sub>3</sub>)]-0.12NaNbO<sub>3</sub> sample. In addition, at 160&#xa0;°C, the sample has 2.8&#xa0;J/cm<sup>3</sup> of <i>W</i><sub><i>r</i></sub> and 92.1% of <i>η</i> at 240&#xa0;kV/cm. Besides, the sample has excellent power density and rapid charge/discharge capability.</p>

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Significantly improved energy storage characteristics of Bi0.5Na0.5TiO3-BaTiO3-based lead-free relaxation ferroelectric ceramics

  • 期刊论文

  • 发表日期：

    2025年2月28日

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  • Minghui Sun,
  • Li Wang,
  • Ruiling Jia,
  • Yang Fu,
  • Shengnan Yao

摘要

Dielectric ceramic capacitors have received a great deal of attention. In this work, (1-x)[0.92Bi0.5Na0.5TiO3-0.08(0.5Ca0.3Ba0.7TiO3-0.5BaTi0.8Zr0.2O3)]-xNaNbO3 ceramics were prepared. The breakdown electric field of the ceramics is significantly enhanced, thanks to the rational two-phase (P4bm and R3c) coexistence structure and introduction of NaNbO3. As a result, a recoverable energy storage density (Wr) of 3.7 J/cm3 and an efficiency (η) of 84.8% are achieved in 0.88[0.92Bi0.5Na0.5TiO3-0.08(0.5Ca0.3Ba0.7TiO3-0.5BaTi0.8Zr0.2O3)]-0.12NaNbO3 sample. In addition, at 160 °C, the sample has 2.8 J/cm3 of Wr and 92.1% of η at 240 kV/cm. Besides, the sample has excellent power density and rapid charge/discharge capability.