Poling piezoelectric (K,Na,Li)NbO<sub>3</sub>-polydimethylsiloxane composites

Journal article (2017)

Authors

D.B. Deutz Novel Aerospace Materials - Aerospace Engineering
N.T. Mascarenhas Novel Aerospace Materials - Aerospace Engineering
S. van der Zwaag Novel Aerospace Materials - Aerospace Engineering
W.A. Groen Novel Aerospace Materials - Aerospace Engineering , TNO
Research Group
Novel Aerospace Materials (Aerospace Engineering) (TU Delft)
Copyright: © 2017 D.B. Deutz, N.T. Mascarenhas, S. van der Zwaag, W.A. Groen
DOI
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https://doi.org/10.1080/00150193.2017.1360110
Dielectrophoresis Piezoelectric composites Poling
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Published Date

27-07-2017

Language

English

Faculty

Aerospace Engineering

Department

Aerospace Structures & Materials

Research Group

Novel Aerospace Materials

Abstract

Composites of aligned (K,Na,Li)NbO3 (KNLN) piezoceramic particles in a PDMS polymer matrix are presented as promising materials for flexible sensors and energy harvesters. Their ease of processing is matched with a relatively high damage tolerance and piezoelectric performance at low dielectric loss. To maximize piezoelectric performance, the effective poling conditions for dielectrophoretically structured KNLN-PDMS composites are studied, and compared with random composites. Effective poling is identified at 7.5 kV/mm, for 6 min at 150°C in structured composites. The structured composites demonstrate improved piezoelectric performance, with respect to random composites, while retaining the low stiffness of the PDMS polymer matrix.