"A Measure of Energy Density to Quantify Progress in Pb-free Piezoelect" by Nathan Giles-Donovan, Nicola G. Fenu et al.
The negative environmental impact of Pb has led to an increased demand for Pb-free electronics. This is particularly important in ultrasonic transducers where Pb-based piezoelectric materials, primarily ceramic PZT, are the dominant choice. Naturally for Pb-free materials to become a viable option, the performance must match that of the current standard. However, present comparison methods and figures of merit for piezoelectric materials are based on specific use cases which can lead to disparat...
Source: uow.edu.au