Relationship between Nonlinear Piezoelectricity and Decrease of Mechanical Quality Factor in Pb(Mn1/3Sb2/3)O3–PbZrO3–PbTiO3 Piezoelectric Ceramics Driven at High Power

概要

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By changing the Pb(Mn1/3Sb2/3)O3 content and Zr/Ti ratio, Pb(Mn1/3Sb2/3)O3–PbZrO3–PbTiO3 (PMS–PZT) system piezoelectric ceramics having different nonlinear piezoelectricities were fabricated. The transient responses of the sample current and the vibration velocity at the sample end were simultaneously measured during high-power driving. Both mechanical quality factors, $Q_{\text{m}}$, which were calculated from these two kinds of transient responses, changed similarly on the driving power scale. This indicates that the change in $Q_{\text{m}}$ when driven at a high power can be estimated from the transient response of the sample current. From the analysis of the experimental results of $Q_{\text{m}}$, it was found that high-power driving induces a decrease in $Q_{\text{m}}$ more easily in the samples with larger nonlinear piezoelectric constants of third-higher term, $\xi_{\text{D31}}$.
2010-09-25