Nonlinear Piezoelectric Effect in Ferroelectric Ceramics

概要

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Ferroelectric ceramic is often subjected to both high electric and high stress in piezoelectric power devices, causing nonlinear piezoelectric response. In this work, nonlinear behavior of the ferroelectric ceramic, Pb(Mn1/3Sb2/3)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3, electrically excited at resonant mode was studied. It was found that an induced vibration stress has a greater effect on the nonlinearity than an electric field. Mechanical loss factor Qm-1, Young's modulus cE and piezoelectric d31 constant are shown to be a function of the square of the vibration stress above the stress threshold. It was also found that the nonlinear proportional constant for the stress becomes smaller in the order of Qm-1, d31 and cE, and that the softer in piezoelectricity the material is, the larger the nonlinear proportional constant becomes.
Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
1998-09-30