Simulations on the electromechanical poling of ferroelectric ceramics

Effective electromechanical moduli of ferroelectric ceramics with fiber textures

Effective electromechanical moduli of ferroelectric ceramics with fiber textures" (2005). Faculty Publications from Nebraska Center for Materials and Nanoscience. 42.

A Mesoscopic Electromechanical Theory of Ferroelectric Films and Ceramics

We present a multi-scale modelling framework to predict the effective electromechanical behavior of ferroelectric ceramics and thin films. This paper specifically focuses on the mesoscopic scale and models the effects of domains and domain switching taking into account intergranular constraints. Starting from the properties of the single crystal and the pre-poling granular texture, the theory p...

On the fracture toughness anisotropy of mechanically poled ferroelectric ceramics

In this paper an incremental constitutive theory for the deformation due to switching in ferroelectrics is applied to predict the fracture toughness anisotropy in these materials after mechanical poling. Mechanical poling of an initially unpoled specimen differs from electrical poling in that only mechanical stresses are applied to the material. Therefore, no electrical polarization can develop...

Electromechanical Anisotropy at the Ferroelectric to Relaxor Transition of (Bi0.5Na0.5)0.94Ba0.06TiO3 Ceramics from the Thermal Evolution of Resonance Curves

(Bi0.5Na0.5)0.94Ba0.06TiO3 dense ceramics were obtained from autocombustion sol-gel synthesized nanopowders and sintered at 1050 ◦C for 1–2 h for the study of the electromechanical anisotropy. Measurement of the complex impedance spectrum was carried out on thin ceramic disks, thickness-poled, as a function of the temperature from 16 ◦C up to the vanishing of the electromechanical resonances at...

Nanoscale electromechanical properties of CaCu3Ti4O12 ceramics