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<p>Maintaining a high Curie temperature (<i>T</i><sub>C</sub>) along with a piezoelectric coefficient (<i>d</i><sub>33</sub>) is crucial for the effective application of actuators and sensors. In this study, (0.36-<i>x</i>)BiScO<sub>3</sub>-0.64PbTiO<sub>3</sub>-<i>x</i>BaTiO<sub>3</sub> ceramics were synthesized via the solid-state reaction method. We thoroughly investigated the influence of BaTiO<sub>3</sub> (BT) additions on the structural, dielectric, ferroelectric, electrostrain and piezoelectric properties of ceramics. The X-ray diffraction (XRD) patterns showed that the phase evolution from a coexistence of coexistence of rhombohedral (<i>R</i>) and tetragonal (<i>T</i>) phases to a tetragonal (<i>T</i>) phase as the BT content increasing from 0 to 20%. The temperature-dependent dielectric properties exhibited a diffused phase transition with increasing BT content. The piezoelectric coefficient (<i>d</i><sub>33</sub>) is most noticeable at 450 pC/N, with an electromechanical coupling factor (<i>k</i><sub>P</sub>) of 57% and a Cuire temperature (<i>T</i><sub>C</sub> = 399.5&#xa0;°C). In addition, a large electrostrain of <i>S</i><sub>max</sub> = 0.23% and a high remanent polarization (<i>P</i><sub>r</sub>) of 54.7 μC/cm<sup>2</sup> were observed and stable at <i>x</i> = 0.05. These results suggest that the BS-PT-<i>x</i>BT (0 ≤ <i>x</i> ≤ 0.20) ceramics are promising candidates for high-temperature piezoelectric applications.</p>

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Phase evolution and enhanced electrostrain characteristics of (0.36-x)BiScO3-0.64PbTiO3-xBaTiO3 ceramic solid solutions

  • 期刊论文

  • 发表日期：

    2025年3月29日

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  • Subramanian Sasikumar,
  • Min-Seon Lee,
  • Young Hun Jeong

摘要

Maintaining a high Curie temperature (TC) along with a piezoelectric coefficient (d33) is crucial for the effective application of actuators and sensors. In this study, (0.36-x)BiScO3-0.64PbTiO3-xBaTiO3 ceramics were synthesized via the solid-state reaction method. We thoroughly investigated the influence of BaTiO3 (BT) additions on the structural, dielectric, ferroelectric, electrostrain and piezoelectric properties of ceramics. The X-ray diffraction (XRD) patterns showed that the phase evolution from a coexistence of coexistence of rhombohedral (R) and tetragonal (T) phases to a tetragonal (T) phase as the BT content increasing from 0 to 20%. The temperature-dependent dielectric properties exhibited a diffused phase transition with increasing BT content. The piezoelectric coefficient (d33) is most noticeable at 450 pC/N, with an electromechanical coupling factor (kP) of 57% and a Cuire temperature (TC = 399.5 °C). In addition, a large electrostrain of Smax = 0.23% and a high remanent polarization (Pr) of 54.7 μC/cm2 were observed and stable at x = 0.05. These results suggest that the BS-PT-xBT (0 ≤ x ≤ 0.20) ceramics are promising candidates for high-temperature piezoelectric applications.