Studies of Piezoelectric Behaviors for PVF2 under Dynamic Loadings

The piezoelectric behaviors of PVF2 (polyvinylidene fluoride) under dynamic loadings (0.01~4 MPa) are studied by means of explosion shock tube. It is found in the experiments that the piezoelectric sensitivity abruptly decreases for the loading pressures larger than 0.25 MPa, and approaches a constant. The crystalline feature of PVF2 under dynamic loadings were observed with a X-ray diffractometer. The results show that it is not obviously changed even undergoing shock loadings of 3~4 MPa for many times.