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Exceptional High-Power and Field-Stable Performance in Hard Pb(Zr,Ti)O3-Rich Textured Ceramics.

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Summary

This study developed advanced hard textured piezoelectric ceramics using a PZT-rich matrix and defect engineering. These novel ceramics achieve high performance for demanding applications like underwater acoustic transducers.

Keywords:
PZThigh‐power propertiestextured ceramicsthermal/electric stabilityvibration velocity

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Area of Science:

  • Materials Science
  • Solid State Physics
  • Ceramics Engineering

Background:

  • Textured piezoelectric ceramics enhance piezoelectric coefficient (d33) but hard textured ceramics lag in high-power performance due to co-optimization challenges.
  • Existing hard textured ceramics (e.g., PT-based, PZT-poor) exhibit limited excitation electric field (E) and poor stability (low coercive field (EC) and Curie temperature (TC)).

Purpose of the Study:

  • To develop high-performance hard textured piezoelectric ceramics with superior high-power capabilities.
  • To overcome limitations of existing hard textured ceramics by focusing on PZT-rich compositions and synergistic defect engineering.

Main Methods:

  • Selected a PZT-rich composition as the matrix for hard textured piezoelectric ceramics.
  • Integrated defect engineering with crystallographic anisotropy.
  • Utilized high-resolution microscopy and piezoelectric force microscopy to analyze loss mechanisms and domain dynamics.

Main Results:

  • Developed Mn-doped 0.1PYN-0.9PZT textured ceramics exhibiting high vibration velocity (v ≈ 0.9 m s⁻¹), high coercive field (EC ≈ 11.4 kV cm⁻¹), and high Curie temperature (TC ≈ 340 °C).
  • Achieved performance exceeding common hard lead-based random and textured ceramics, as well as single crystals.
  • Demonstrated enhanced figure of merit (FOM = d33×Qm×E) and superior electric/thermal field stability.

Conclusions:

  • Successfully demonstrated high-performance hard PZT-rich textured piezoelectric ceramics.
  • The developed ceramics offer significant potential for high-power piezoelectric devices, including underwater acoustic transducers.
  • Synergistic integration of defect engineering and crystallographic anisotropy is key to achieving excellent high-power performance and stability.