Fabrication of Lead-Free Piezoelectric Particle/Polymer Composites and Voltage Output due to Air-Flow/Temperature Change

Abstract

With the appearance of the wearable devices and Internet of Things (IoT) sensors, energy harvesting devices are becoming more and more important. Energy harvesting is a process that captures unused ambient energy. We present the results of output voltage measurements in lead-free piezoelectric particle/polymer composites due to air-flow or temperature change. Barium titanate (BTO)/epoxy composite and potassium sodium niobate (KNN)/epoxy composite sheets were prepared. The composite specimens were polarized using either a parallel plate contact or contactless (corona) polarization technique. The output voltage was then measured for the composites due to air-flow and temperature changes. As the same time, the effect of polarization condition on the performance was discussed.