Theory of electric creep and electromechanical coupling with domain evolution for non-poled and fully poled ferroelectric ceramics.

ABSTRACT: Unlike mechanical creep with inelastic deformation, electric creep with domain evolution is a rarely studied subject. In this paper, we present a theory of electric creep and related electromechanical coupling for both non-poled and fully poled ferroelectric ceramics. We consider electric creep to be a time-dependent process, with an initial condition lying on the D (electric displacement) versus E (electric field) hysteresis loop. Both processes are shown to share the same Gibbs free energy and thermodynamic driving force, but relative to creep, the hysteresis loop is just a field-dependent process. With this view, we develop a theory with a single thermodynamic driving force but with two separate kinetic equations, one for the field-dependent loops in terms of a Lorentzian-

SUBMITTER: Xia X 

PROVIDER: S-EPMC5095447 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature