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<p>Textured piezoelectric ceramics represent a promising approach for enhancing electromechanical performance. However, their macroscopic properties do not scale linearly with the degree of texturing, and the underlying mechanisms driving these enhancements remain insufficiently understood. In this study, high-Curie-temperature (<i>T</i><sub>C</sub> &gt; 400 °C) bismuth scandate-lead titanate (BS-PT) textured ceramics with a high degree of orientation (<i>F</i><sub>001</sub> &gt; 95%) were fabricated via templated grain growth (TGG). For BS-PT compositions near the morphotropic phase boundary (MPB), texturing along the &lt;001&gt; direction significantly improved the piezoelectric properties of the rhombohedral phase but had a negligible effect on tetragonal-dominated compositions. This disparity originates from the angular mismatch between the intrinsic spontaneous polarization direction and the (001) grain orientation. In the rhombohedral phase, this misalignment facilitates substantial polarization rotation under an applied electric field, yielding a divergent and enhanced piezoelectric response. These findings provide critical theoretical insights for the design of high-performance textured piezoceramics.</p>

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Crucial contribution of the rhombohedral phase to <001>-oriented textured BiScO3–PbTiO3 piezoelectric ceramics

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Rixi Li,
  • Xiao Hu,
  • Ricuo Ge,
  • Zhiquan Zhou,
  • Qiaochao Xue,
  • Fangfang Wang,
  • Kang Yan

摘要

Textured piezoelectric ceramics represent a promising approach for enhancing electromechanical performance. However, their macroscopic properties do not scale linearly with the degree of texturing, and the underlying mechanisms driving these enhancements remain insufficiently understood. In this study, high-Curie-temperature (TC > 400 °C) bismuth scandate-lead titanate (BS-PT) textured ceramics with a high degree of orientation (F001 > 95%) were fabricated via templated grain growth (TGG). For BS-PT compositions near the morphotropic phase boundary (MPB), texturing along the <001> direction significantly improved the piezoelectric properties of the rhombohedral phase but had a negligible effect on tetragonal-dominated compositions. This disparity originates from the angular mismatch between the intrinsic spontaneous polarization direction and the (001) grain orientation. In the rhombohedral phase, this misalignment facilitates substantial polarization rotation under an applied electric field, yielding a divergent and enhanced piezoelectric response. These findings provide critical theoretical insights for the design of high-performance textured piezoceramics.