Local disorder in Na_0.5Bi_0.5TiO₃-piezoceramic determined by 3D electron diffuse scattering.

ABSTRACT: Local structural distortions in Na_0.5Bi_0.5TiO₃-based solid solutions have been proved to play a crucial role in understanding and tuning their enhanced piezoelectric properties near the morphotropic phase boundary. In this work all local structural disorders in a lead-free ternary system, namely 85%Na_0.5Bi_0.5TiO₃-10%Bi_0.5K_0.5TiO₃-5%BaTiO₃, were mapped in reciprocal space by 3D electron diffraction. Furthermore, a comprehensive model of the local disorder was developed by analysing the intensity and morphology of the observed weak diffuse scattering. We found that the studied ceramics consists of plate-like in-phase oxygen octahedral nanoscale domains randomly distributed in an anti

SUBMITTER: Neagu A 

PROVIDER: S-EPMC5624983 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature