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

• Published in: Electronic materials letters Vol. 14; no. 2; pp. 113 - 123
• Main Authors: Tolvanen, Jarkko, Hannu, Jari, Juuti, Jari, Jantunen, Heli
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Institute of Metals and Materials 01-03-2018; Springer Nature B.V; 대한금속·재료학회
• Subjects: Addition polymerization; Characterization and Evaluation of Materials; Chemistry and Materials Science; Coefficients; Condensed Matter Physics; Extrusion; Formability; High temperature; Lead zirconate titanates; Liquid crystal polymers; Liquid crystals; Materials Science; Nanotechnology; Nanotechnology and Microengineering; Optical and Electronic Materials; Piezoelectricity; Polymer matrix composites; Pressure sensors; Sensors; 전자/정보통신공학; Extruder; Flexible; Pressure; Piezoelectric; 3D printing
• ISSN: 1738-8090; 2093-6788
• DOI: 10.1007/s13391-018-0027-0

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 d
33
and g
33
of the composites were > 14 pC/N and > 108 mVm/N at pressure < 10 kPa. In all cases, the piezoelectric charge coefficient (d
33
) of the composites decreased as a function of pressure. Also, piezoelectric coefficient (d
33
) 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