Effect of A-site off-stoichiometry on ferroelectric and piezoelectric properties of BaTiO3–Bi(Mg1/2Ti1/2)O3–BiFeO3 ceramics

Hyunwook NAM; Ichiro FUJII; Sangwook KIM; Tomoya AIZAWA; Shintaro UENO; Satoshi WADA

doi:10.2109/jcersj2.19010

Feature: Cutting edge research on electroceramics 2018: Full papers

Effect of A-site off-stoichiometry on ferroelectric and piezoelectric properties of BaTiO₃–Bi(Mg_1/2Ti_1/2)O₃–BiFeO₃ ceramics

Hyunwook NAM, Ichiro FUJII, Sangwook KIM, Tomoya AIZAWA, Shintaro UENO, Satoshi WADA

Author information

Keywords: BF-based piezoelectric ceramics, A-site off-stoichiometry, Defect dipole

JOURNAL FREE ACCESS

2019 Volume 127 Issue 6 Pages 369-373

DOI https://doi.org/10.2109/jcersj2.19010

Details

Abstract

Mn-added 0.3BaTiO₃–0.1Bi_x(Mg_1/2Ti_1/2)O₃–0.6BiFeO₃ (x = 0.93, 0.96, 1.00, 1.04, 1.07, and 1.10) ceramics were fabricated by conventional solid-state reaction. The crystal systems of all the ceramics were pseudo-cubic, and no secondary phase was observed. It was found that the ceramics with x = 1.00 exhibited an optimum piezoelectric property of d₃₃ = 106.16 pC/N, while the Bi-deficient and excess ceramics lowered the piezoelectric properties to 81.09 and 102.29 pC/N, respectively. The reason of the decreases could be associated with domain wall pinning effects by defect complexes and the presence of the residual small amount of Bi₂O₃.

Corresponding author

Register with J-STAGE for free!