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<p>In this work, NN-based lead-free ceramics [Na<sub>1 − 3x/2</sub>Bi<sub>3x/2</sub>) (Nb<sub>1 − x</sub>Sr<sub>x</sub>) O<sub>3</sub>] where x = 0.00, 0.04, 0.05, 0.06, 0.07, and 0.08 were synthesized via solid-state reaction route. XRD study confirmed the increase of the appearance of secondary phase with the increase of doping concentrations. FE-SEM study showed the decrease of average grain size with the increase of doping concentration. Dielectric study showed dielectric constant (ε<sub>r</sub>) ⁓ 1051 with low dielectric loss (tanδ) &lt; 0.6 near T<sub>c</sub> in [(Na<sub>0.91</sub>Bi<sub>0.09</sub>) (Nb<sub>0.94</sub>Sr<sub>0.06</sub>) O<sub>3</sub>] ceramics at 1&#xa0;kHz frequency. Polarization vs. electric field ferroelectric study of [(Na<sub>0.91</sub>Bi<sub>0.09</sub>) (Nb<sub>0.94</sub>Sr<sub>0.06</sub>) O<sub>3</sub>] ceramics demonstrated the highest total energy storage density (W<sub>total</sub>) of ~ 1.74&#xa0;J/cm³ with a high recoverable energy storage density (W<sub>rec</sub>) of ~ 1.28&#xa0;J/cm³, with an efficiency (η) ~ 74% at an electric field of 145&#xa0;kV/cm among the synthesized ceramics.</p>

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Exploring energy storage characteristics of lead-free [(Na1 − 3x/2Bi3x/2) (Nb1 − xSrx) O3] ceramics

  • 期刊论文

  • 发表日期：

    2025年4月29日

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  • Aman Malasi,
  • M. Chandrasekhar,
  • Ankur Khokhar,
  • Shivam Kumar Mittal,
  • Amiya Mandal,
  • Kanhaiya Lal Yadav,
  • Nibedan Nanda,
  • Pawan Kumar

摘要

In this work, NN-based lead-free ceramics [Na1 − 3x/2Bi3x/2) (Nb1 − xSrx) O3] where x = 0.00, 0.04, 0.05, 0.06, 0.07, and 0.08 were synthesized via solid-state reaction route. XRD study confirmed the increase of the appearance of secondary phase with the increase of doping concentrations. FE-SEM study showed the decrease of average grain size with the increase of doping concentration. Dielectric study showed dielectric constant (εr) ⁓ 1051 with low dielectric loss (tanδ) < 0.6 near Tc in [(Na0.91Bi0.09) (Nb0.94Sr0.06) O3] ceramics at 1 kHz frequency. Polarization vs. electric field ferroelectric study of [(Na0.91Bi0.09) (Nb0.94Sr0.06) O3] ceramics demonstrated the highest total energy storage density (Wtotal) of ~ 1.74 J/cm³ with a high recoverable energy storage density (Wrec) of ~ 1.28 J/cm³, with an efficiency (η) ~ 74% at an electric field of 145 kV/cm among the synthesized ceramics.