期刊
MATERIALS
卷 14, 期 15, 页码 -出版社
MDPI
DOI: 10.3390/ma14154071
关键词
ferroelectric composites; piezoelectric sensor; health monitoring; 1-3 connectivity; dielectrophoresis; smart materials
类别
资金
- INSAVALOR
- Region Auvergne Rhone Alpes
Piezoelectric composites, particularly those with PZT filler in PDMS matrix, have unique internal structure and are widely used in structural monitoring sensors in various fields due to their high performance and low-cost characteristics.
Piezoelectric materials have been used for decades in the field of sensors as transducers and energy harvesters. Among these, piezoelectric composites are emerging being extremely advantageous in terms of production, costs, and versatility. However, the piezoelectric performances of a composite with randomly dispersed filler are not comparable with bulk ferroelectric ceramics and electroactive polymers. In order to achieve highly performing and low-cost materials, this work aims to develop flexible composites made of Lead zirconate titanate (PZT) filler in Polydimethylsiloxane (PDMS) matrix, with a specific internal structure called quasi-1-3 connectivity. Such a structure, comprising particles arranged in columns along a preferred direction, is performed through dielectrophoresis by applying an alternating electric field on the composite before and during the polymerization. The developed flexible material could be introduced into complex structures in various application fields, as sensors for structural monitoring.
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