Corona Poling of Printed Piezoelectric Films

<p> <strong> Introduction </strong></p><p> What is piezoelectric material? <ul> <li> Piezoelectric materials generate charge when squeezed or deformed and convert mechanical energy into electrical energy </li> <li> They are used in sensors, transducers, and actuators in various devices </li> <li> Examples include PVDF, PVDF-trFE, ceramics, and polymers </li> </ul></p><p> What is PVDF-trFE? <ul> <li> Polyvinylidene Fluoride-Trifluoroethylene (20 mol% trFE) </li> <li> It exhibits enhanced piezoelectric properties compared to PVDF alone </li> </ul></p><p> What is d_33? <ul> <li> Piezoelectric coefficient </li> <li> d_33=*Delta;Q/&Delta;:F </li> </ul></p><p> What is PVDF-trFE Phase? <ul> <li> Alpha phase is non-polar with a disordered molecular structure (as-printed material ) </li> <li> Beta phase is polar, ordered, and demonstrates enhanced piezoelectric properties (poling is required) </li> </ul></p>