Morphotropic phase boundary-like effect in hybrid electrically poled, mechanically depolarized ferroelectric ceramics

The morphotropic phase boundary plays an important role in ferroelectric materials

Qiangzhong Wang; Faxin Li

2020

Scholarcy highlights

  • The morphotropic phase boundary plays an important role in ferroelectric materials
  • We produce an MPB-like effect in hybrid electrically poled, mechanically depolarized BaTiO3 and lead zirconate titanate ceramics where depolarized region A and vertical electrically poled region C intersect each other with a period of 400 μm in both in-plane directions
  • The polarization and strain of both HEPMD samples are over 3 times those of conventionally poled samples under unipolar electric loading
  • The tendencies are similar and the coercive fields of the HEPMD samples are considerably smaller, which is similar to the MPB effect in traditional ferroelectric ceramics
  • Enhanced polarization and strain occur in HEPMD samples due to reversible ferroelectric domain switching during loading and unloading under large electric fields
  • The HEPMD method may be applied to all types of multiaxial ferroelectric ceramics to enhance actuation strain and polarization

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