Electric-Field-Induced Phase Transformation and Frequency-Dependent Behavior of Bismuth Sodium Titanate-Barium Titanate.

ABSTRACT: The electric field response of the lead-free solid solution (1-x)Bi_0.53Na_0.47TiO₃-xBaTiO₃ (BNT-BT) in the higher BT composition range with x = 0.12 was investigated using in situ synchrotron X-ray powder diffraction. An introduced Bi-excess non-stoichiometry caused an extended morphotropic phase boundary, leading to an unexpected fully reversible relaxor to ferroelectric (R-FE) phase transformation behavior. By varying the field frequency in a broad range from 10^-4 up to 10² Hz, BNT-12BT showed a frequency-dependent gradual suppression of the field induced ferroelectric phase transformation in favor of the relaxor state. A frequency triggered self-heating within the sample was found and the temperature i

SUBMITTER: Lee KY 

PROVIDER: S-EPMC7084422 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature