Electronic Materials Letters

, Volume 14, Issue 2, pp 113–123 | Cite as

Piezoelectric Flexible LCP–PZT Composites for Sensor Applications at Elevated Temperatures

  • Jarkko Tolvanen
  • Jari Hannu
  • Jari Juuti
  • Heli Jantunen
Article

Abstract

In this paper fabrication of piezoelectric ceramic–polymer composites is demonstrated via filament extrusion enabling cost-efficient large-scale production of highly bendable pressure sensors feasible for elevated temperatures. These composites are fabricated by utilizing environmentally resistant and stable liquid crystal polymer matrix with addition of lead zirconate titanate at loading levels of 30 vol%. These composites, of approximately 0.99 mm thick and length of  > 50 cm, achieved excellent bendability with minimum bending radius of ~ 6.6 cm. The maximum piezoelectric coefficients d33 and g33 of the composites were > 14 pC/N and > 108 mVm/N at pressure < 10 kPa. In all cases, the piezoelectric charge coefficient (d33) of the composites decreased as a function of pressure. Also, piezoelectric coefficient (d33) further decreased in the case of increased frequency press-release cycle sand pre-stress levels by approximately 37–50%. However, the obtained results provide tools for fabricating novel piezoelectric sensors in highly efficient way for environments with elevated temperatures.

Graphical Abstract

Keywords

Extruder Flexible Piezoelectric Pressure 3D printing 

Notes

Acknowledgements

Financial support of the Hybrid materials project (2105/31/2013) of Tekes program of the Finnish Metals and Engineering Competence Cluster (FIMECC Ltd) is gratefully acknowledged. Author J.J. acknowledges the funding of the Academy of Finland (project numbers 267573). Author JT was supported by Riitta and Jorma J. Takanen Foundation, Walter Ahlström Foundation, Tauno Tönning Foundation, and Finnish Foundation for Technology Promotion. Also, authors would like to acknowledgment Dr. Maciej Sobocinski for introducing the filament extruding technique and Dr. Mikko Nelo for helping to find possible solutions to fabricate filaments with higher PZT loadings.

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Copyright information

© The Korean Institute of Metals and Materials 2018

Authors and Affiliations

  1. 1.Microelectronics Research UnitUniversity of OuluOuluFinland

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