首页|Improvement of dielectric and energy storage properties in Sr0.85Bi0.1ZrO3 modified (Bi0.5Na0.5)0.7Sr0.3TiO3 lead-free ceramics

Improvement of dielectric and energy storage properties in Sr0.85Bi0.1ZrO3 modified (Bi0.5Na0.5)0.7Sr0.3TiO3 lead-free ceramics

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  • NSTL
  • Elsevier
? 2022 Elsevier B.V.In recent years, with the rapid development of electronic components industry, higher requirements are put forward for energy storage density and efficiency of pulse power capacitors. In this work, the improved energy storage density and efficiency of (Bi0.5Na0.5)0.7Sr0.3TiO3 (BNST)-based ceramics have been obtained by introducing the Sr0.85Bi0.1ZrO3(SBZ). The addition of SBZ reduced phase transition temperature to about 50 oC, accompanied by relaxation enhancement. A high recoverable energy density (Wrec = 3.53 J/cm3) and energy efficiency (η = 87.15%) were synchronously achieved in 0.875BNST-0.125SBZ ceramic under 270 kV/cm. Moreover, excellent temperature stability (20–120 oC) and frequency stability (5–200 Hz) for energy storage have been achieved at 150 kV/cm. A power density (PD) of 7.32 MW/cm3 and the transitory discharge time (t0.9 = 0.86 μs) were achieved for 0.875BNST-0.125SBZ ceramics under 120 kV/cm. These characteristics indicate that 0.875BNST-0.125SBZ ceramic is expected to be applied in high-power equipment.

Charge-discharge performancesEnergy densityEnergy efficiencyLead-free ceramics

Zhang F.、Dai Z.、Liu W.、Wei Y.、Xi Z.、Ren X.

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Shaanxi Province Key Laboratory of Thin Films Technology & Optical Test Xi'an Technological University

Shaanxi Key Laboratory of Optoelectronic Functional Materials and Devices School of Materials and Chemical Engineering Xi'an Technological University

Frontier Institute of Science and Technology and State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University

2022

10.1016/j.jallcom.2022.164577

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.908
  • 11
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