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This study presents a self-standing bimorph actuator made from a lead-free piezoelectric composite material. The composite consists of nanocrystalline lead-free piezoelectric fillers dispersed in a piezo polymeric matrix. Electric field-induced polarization measurements showed significant polarization enhancement in the flexible bimorph structure compared to unimorph actuators. Piezoelectric measurements indicated higher displacement and lower resonance frequency for the flexible substrate compared to the rigid one. The bimorph actuator exhibited more than double the displacement of the flexible unimorph and demonstrated excellent fatigue resistance over 10^11 cycles without signs of aging.

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Lead-Free Composite Bimorph Actuator for Energy Harvesting and Active Sensing

  • 会议论文

  • 发表日期：

    2025年

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  • Paola Sabrina Barbato,
  • Christian Verrengia Caporossi,
  • Valeria Casuscelli,
  • Annachiara Esposito,
  • Rossana Scaldaferri

摘要

This study presents a self-standing bimorph actuator made from a lead-free piezoelectric composite material. The composite consists of nanocrystalline lead-free piezoelectric fillers dispersed in a piezo polymeric matrix. Electric field-induced polarization measurements showed significant polarization enhancement in the flexible bimorph structure compared to unimorph actuators. Piezoelectric measurements indicated higher displacement and lower resonance frequency for the flexible substrate compared to the rigid one. The bimorph actuator exhibited more than double the displacement of the flexible unimorph and demonstrated excellent fatigue resistance over 10^11 cycles without signs of aging.