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<p>The dielectric, ferroelectric and energy storage properties of (Ba<sub>0.85</sub>Ca<sub>0.15</sub>)(Zr<sub>0.1</sub>Ti<sub>0.9</sub>)O<sub>3</sub> (BCZT)-x wt% Li<sub>2</sub>CO<sub>3</sub> ceramics (<i>x</i> = 0, 1, 2, 3 and 4) are studied. With x increasing to 2, the diffused phase transition gradually enhances because of the enhanced distortion of crystal structure. With further increasing x, the diffused phase transition gradually weakens due to the generated oxygen vacancies. A maximum <i>ε</i><sub>m</sub> of 15,488 is achieved at <i>x</i> = 3 due to the bigger average grain size. Meanwhile, the optimal energy storage properties are found at BCZT-3 wt% Li<sub>2</sub>CO<sub>3</sub> ceramic. Compared with pure BCZT ceramic, the energy storage density of BCZT-3 wt% Li<sub>2</sub>CO<sub>3</sub> ceramic is improved from 71&#xa0;mJ/cm<sup>3</sup> to 143&#xa0;mJ/cm<sup>3</sup> and the energy storage efficiency increases from 56 to 69%. It makes BCZT-3 wt% Li<sub>2</sub>CO<sub>3</sub> ceramic more suitable to use as energy storage capacitors.</p>

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Effects of Li2CO3 sintering aid on the dielectric, ferroelectric and energy storage properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 ceramic

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Shengbin Zhang,
  • Haoran Zheng,
  • Pan Yang,
  • Shihui Yu

摘要

The dielectric, ferroelectric and energy storage properties of (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 (BCZT)-x wt% Li2CO3 ceramics (x = 0, 1, 2, 3 and 4) are studied. With x increasing to 2, the diffused phase transition gradually enhances because of the enhanced distortion of crystal structure. With further increasing x, the diffused phase transition gradually weakens due to the generated oxygen vacancies. A maximum εm of 15,488 is achieved at x = 3 due to the bigger average grain size. Meanwhile, the optimal energy storage properties are found at BCZT-3 wt% Li2CO3 ceramic. Compared with pure BCZT ceramic, the energy storage density of BCZT-3 wt% Li2CO3 ceramic is improved from 71 mJ/cm3 to 143 mJ/cm3 and the energy storage efficiency increases from 56 to 69%. It makes BCZT-3 wt% Li2CO3 ceramic more suitable to use as energy storage capacitors.