Piezoelectric flexible LCP–PZT composites for sensor applications at elevated temperatures
Tolvanen, Jarkko; Hannu, Jari; Juuti, Jari; Jantunen, Heli (2018-03-03)
Tolvanen, J., Hannu, J., Juuti, J. et al. Electron. Mater. Lett. (2018) 14: 113. https://doi.org/10.1007/s13391-018-0027-0
© The Korean Institute of Metals and Materials 2018. This is a post-peer-review, pre-copyedit version of an article published in Electronic Materials Letters. The final authenticated version is available online at: http://dx.doi.org/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 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.
- Avoin saatavuus