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<p>This study explores the impact of SrTiO<sub>3</sub> (STO) chemical substitution on the crystal lattice and piezoelectric properties of BiFeO<sub>3</sub>–BaTiO<sub>3</sub> (BFO-BTO) solid solution. The investigation involves crystal structure analysis based on the X-ray diffraction data and local-scale measurements of the piezoelectric properties using piezoresponse force microscopy. We demonstrated that the substitution by Sr results in the enhancement of the electromechanical response as well as the volume fraction of the polar phase, while the crystal structure remains pseudocubic. The enhancement of the piezoelectric properties is associated with the reduction of the chemical disorder and breaking of the core–shell structure in the grains of the ceramics. This research reveals the intricate interplay between the chemical composition, the crystal structure, and electromechanical properties of the BFO-BTO-STO ceramics, identifying the compositions with potential interest for energy storage applications.</p>

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Evolution of the polar phase across morphotropic phase boundary in 0.65BiFeO3–0.35BaTiO3–SrTiO3 solid solutions

  • 期刊论文

  • 发表日期：

    2025年2月7日

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  • Alexander Abramov,
  • Anton Turygin,
  • Ismail Hossain,
  • Li Jin,
  • Vladimir Shur,
  • Denis Alikin,
  • Yuan Yao,
  • Alex V. Trukhanov,
  • Dmitry Karpinsky

摘要

This study explores the impact of SrTiO3 (STO) chemical substitution on the crystal lattice and piezoelectric properties of BiFeO3–BaTiO3 (BFO-BTO) solid solution. The investigation involves crystal structure analysis based on the X-ray diffraction data and local-scale measurements of the piezoelectric properties using piezoresponse force microscopy. We demonstrated that the substitution by Sr results in the enhancement of the electromechanical response as well as the volume fraction of the polar phase, while the crystal structure remains pseudocubic. The enhancement of the piezoelectric properties is associated with the reduction of the chemical disorder and breaking of the core–shell structure in the grains of the ceramics. This research reveals the intricate interplay between the chemical composition, the crystal structure, and electromechanical properties of the BFO-BTO-STO ceramics, identifying the compositions with potential interest for energy storage applications.