论文信息 - Electromechanical Testing and Modeling of a Pb(Mg1/3Nb2/3)O3‐PbTiO3‐BaTiO3 Relaxor Ferroelectric

Electromechanical Testing and Modeling of a Pb(Mg1/3Nb2/3)O3‐PbTiO3‐BaTiO3 Relaxor Ferroelectric

Compressive prestress effects on the electrical and mechanical properties of relaxor ferroelectric materials were studied as a function of temperature for several formulations of Pb(Mg1/3Nb2/3)O3-PbTiO3-BaTiO3 (PMN-PT-BT) ceramics. Experimentally measured polarization and strain, induced by an ac electric field, decreased as compressive stress increased. Effective Young's moduli also were measured under constant dc electric fields. A significant decrease in modulus was observed with increasing field. The prestress and modulus experiments were modeled analytically using a proposed relaxor ferroelectric constitutive law. In general, excellent agreement between the model and experiments was obtained, indicating that the model accurately predicted the coupled behavior of this relaxor ferroelectric material.

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