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Updated: Oct 16, 2025

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A gravity-driven sintering method to fabricate geometrically complex compact piezoceramics.

Yao Shan1, Shiyuan Liu1, Biao Wang1

  • 1Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China.

Nature Communications
|October 19, 2021
PubMed
Summary

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This summary is machine-generated.

A new gravity-driven sintering process enables the fabrication of curved, compact piezoceramics. This method overcomes 3D printing limitations, offering a scalable and cost-effective route for advanced piezoelectric materials.

Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Electromechanical Devices

Background:

  • Compact and geometrically complex piezoceramics are crucial for electromechanical devices.
  • Current 3D printing methods struggle to produce curved, compact piezoceramics due to feedstock limitations.

Purpose of the Study:

  • To develop a novel method for fabricating curved and compact piezoceramics.
  • To overcome the limitations of existing 3D printing techniques for complex ceramic shapes.

Main Methods:

  • A gravity-driven sintering (GDS) process was employed, utilizing gravitational force and high-temperature viscous behavior.
  • Lead zirconate titanate (PZT) specimens were sintered to achieve desired curved geometries.

Main Results:

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  • The GDS process successfully produced curved PZT ceramics with tunable geometries.
  • Achieved piezoelectric properties (d33 = 595 pC/N) are comparable to conventionally sintered PZT.
  • The GDS process is suitable for large-scale and low-cost production.

Conclusions:

  • The GDS process provides a facile and universal route for fabricating functional curved ceramics.
  • This method offers a viable alternative to 3D printing for complex piezoceramic components.
  • The GDS strategy fabricates curved piezoceramics without compromising functionality.