Simulations on the electromechanical poling of ferroelectric ceramics

TL;DR

This paper uses simulations based on the two-step-switching model to analyze the electromechanical poling process in ferroelectric ceramics, revealing differences in remnant polarization depending on the order of mechanical stress and electric field application.

Contribution

It demonstrates the validity of the two-step-switching model in simulating electromechanical poling and explains polarization differences based on stress application order.

Findings

Remnant polarization differs when mechanical stress is applied before or after electric poling.

Simulation results match experimental observations.

The two-step-switching model accurately describes the poling process.

Abstract

Based on the two-step-switching model, the process of electromechanical poling of a ferroelectric ceramics is simulated. A difference of the remnant polarizations between two poling protocols (mechanical stress is applied before and after the application of poling field) is found from our simulations, which is also observed in experiment. An explanation is given to illustrate why the remnant polarization for the case that mechanical stress is loaded after the application of electric field is larger than the case that mechanical stress is loaded before the application of electric field. Our simulation results supply a proof for the validity of the two-step-switching model in the electromechanical poling of polycrystalline ferroelectric ceramics.