Extrinsic Contribution and Instability Properties in Lead-Based and Lead-Free Piezoceramics

Materials

José Eduardo García¹ 

[1] Department of Physics, Universitat Politècnica de Catalunya—BarcelonaTech., 08034 Barcelona, Spain

关键词: piezoelectric materials;    nonlinear properties;    extrinsic contribution;    dielectric properties;    piezoelectric properties;   

DOI  :  10.3390/ma8115426

来源: mdpi

【 摘 要 】

Piezoceramic materials generally exhibit a notable instability of their functional properties when they work under real external conditions. This undesirable effect, known as nonlinear behavior, is mostly associated with the extrinsic contribution to material response. In this article, the role of the ferroelectric domain walls’ motion in the nonlinear response in the most workable lead-based and lead-free piezoceramics is reviewed. Initially, the extrinsic origin of the nonlinear response is discussed in terms of the temperature dependence of material response. The influence of the crystallographic phase and of the phase boundaries on the material response are then reviewed. Subsequently, the impact of the defects created by doping in order to control the extrinsic contribution is discussed as a way of tuning material properties. Finally, some aspects related to the grain-size effect on the nonlinear response of piezoceramics are surveyed.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.