“…This is quite clear from the SEM results. The authors obtained quite good performances compared to those obtained by others at Composites with 70 vol% of piezoelectric particles, the BCTZOcement composites, with average sizes of 569.8 and 8.9 μm have d 33 values of 44 and 52 pC/N, respectively, which are higher than that of the BTO-cement composite (16 pC/N) [6] and the PZT-cement composite (43 pC/N) [3]. Therefore, the authors expect that 1-3 will play a more active role than 0-3 lead free piezoelectric-cement composites for sensors and actuators applications in civil engineering structures.…”