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Updated: May 30, 2025
10:40
A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
Published on: April 8, 2018
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Large Electromechanical Response and Field-Induced Shape Memory Effect in Ferroelectric Ceramics
Menglu Li1, Weili Li1, Wenping Cao2
1School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 29, 2025
Summary
This study introduces a phase structure design for (Na,Bi,Sr)TiO3-PbTiO3 ceramics, achieving a significant shape memory effect for electromechanical actuators. Optimized composition enhances electric-field-induced deformation and shape memory properties.
Area of Science:
- Materials Science
- Solid State Physics
- Ceramic Engineering
Background:
- Electric-field-induced shape memory effect is crucial for advanced electromechanical actuators.
- Tailoring material properties is key to enhancing this effect.
Purpose of the Study:
- To design a phase structure routine in (1-x)(75Na0.5Bi0.5TiO3-25SrTiO3)-xPbTiO3 ceramics.
- To achieve large electromechanical response and shape memory effect.
Main Methods:
- Investigated phase structure design in (1-x)(75Na0.5Bi0.5TiO3-25SrTiO3)-xPbTiO3 ceramics.
- Analyzed the relationship between polarization asymmetry and shape memory effect.
- Studied the influence of PbTiO3 content on ferroelectric phase, crystal structure, and coercive field.
Main Results:
- Shape memory effect is linked to bending deformation from asymmetric polarization, caused by Bi3+ and Pb2+ reduction via electron injection.
- Increasing PbTiO3 content enhances ferroelectric phase (P4mm), c/a ratio, and coercive field.
- A composition with 40% PbTiO3 achieved 2.77% field-induced deformation and 1.75% shape memory effect at 80kV/cm and 0.1 Hz.
Conclusions:
- Phase structure design is effective in optimizing electromechanical response and shape memory effect in these ceramics.
- PbTiO3 addition is critical for enhancing ferroelectric properties and achieving superior performance.
- The developed ceramic composition shows significant potential for electromechanical actuator applications.
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