Performance enhancement of the piezoelectric ceramics by alternating current polarizing

The piezoelectric properties of the PZT-5H ceramics under various polarization conditions are compared and analyzed. It is worth noting that compared to direct current polarization, the piezoelectric coefficient (d(33)), free dielectric constant (epsilon(T)(33)/epsilon(0)), and electromechanical coupling coefficient (k(t)) of the PZT-5H ceramics under alternating current polarization (ACP) have increased by 10.7%, 15.9%, and 15.4%, respectively. According to the analysis of the domain distribution patterns in the [001] surface of the PZT-5H ceramics under the two polarization conditions measured using a piezoresponse force microscope, the ACP makes the piezoelectric material have a high density of the domain wall, which greatly enhances its piezoelectric performance. This work provides an effective means to improve the piezoelectric properties of PZT-5H ceramics and will be of great significance to piezoelectric applications using this type of piezoelectric ceramic.

Automated summary

The study found that the piezoelectric properties of PZT-5H ceramics significantly improve under alternating current polarization conditions, with the piezoelectric coefficient, free dielectric constant, and electromechanical coupling coefficient increasing by 10.7%, 15.9%, and 15.4% respectively. The alternating current polarization results in a high density of domain walls, greatly enhancing the performance of the piezoelectric material.