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Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
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Morphotropic Phase Boundary in Irradiated Ferroelectric Polymers.

Yuquan Liu1,2, Hui Tong3, Chenyi Li1,2

  • 1State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, China.

Advanced Materials (Deerfield Beach, Fla.)
|June 10, 2025
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Summary
This summary is machine-generated.

Ion irradiation creates a morphotropic phase boundary (MPB) in ferroelectric polymers without altering composition. This method significantly enhances piezoelectric properties, offering a scalable approach for advanced materials.

Keywords:
ferroelectric polymersion irradiationmorphotropic phase boundarypiezoelectricity

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Area of Science:

  • Materials Science
  • Polymer Science
  • Ferroelectric Materials

Background:

  • The morphotropic phase boundary (MPB) is crucial for large piezoelectric effects in ferroelectric polymers.
  • Conventional MPB induction relies on compositional tuning, limiting its application to a few polymer systems.

Purpose of the Study:

  • To introduce a novel method for inducing MPB in ferroelectric polymers using ion irradiation.
  • To demonstrate that ion irradiation can enhance piezoelectric properties without compositional changes.

Main Methods:

  • Ferroelectric polymers were subjected to ion irradiation at varying doses.
  • Structural changes and piezoelectric coefficients (d33) were analyzed.
  • The method's efficacy was validated using different irradiation sources and polymer compositions.

Main Results:

  • Ion irradiation successfully induced a helix/trans MPB in ferroelectric polymers as irradiation dose increased.
  • A significantly enhanced piezoelectric coefficient (d33) of -69.8 pC N⁻¹ was observed near the MPB.
  • The approach proved effective across different irradiation sources and polymer types.

Conclusions:

  • Ion irradiation provides a new, composition-independent route to design MPB in ferroelectric polymers.
  • This scalable postprocessing technique offers a general method to improve piezoelectric responses in these materials.