Influence of BLT content on phase structure and electrical properties of (1-x)BT-xBLT ceramic

Authors

N Thongmee
R Sumang
S Pojprapai
T Klaytae

Publication Date

2018-07-01

Abstract

(1-x)BaTiO3-x(Bi3.25La0.75)Ti3O12; (1-x)BT-xBLT ceramics with x = 0-0.20 wt.% were prepared by a solid-state reaction method. The BaTiO3 (BT) and (Bi3.25La0.75)Ti3O12 (BLT) powders were, respectively, calcined at 1100°C and 750°C for 4 h. The (1-x)BT-xBLT samples were sintered between 1250°C and 1350°C. The structure exhibited a transformation from tetragonal to orthorhombic with increasing in BLT contents. The average grain size increased with increasing BLT contents. The maximum density and relative density about 6.19 ± 0.07 g/cm3and 99.3% were obtained for the composition of 0.95BT-0.05BLT. The Curie temperature (Tc) continuously decreased with increase in BLT contents. The dielectric constant showed a broad peak and pronounced dependence on frequency, which implied an existence of the relaxor behavior. The hysteresis parameters such as saturation polarization (Ps~18.06 mC/cm2), remanent polarization (Pr~12.64 mC/cm2) and coercive field (Ec~11.09 kV/cm) can be improved when BLT content is increased to 0.05 wt.%.

First Page

109

Last Page

115

Recommended Citation

Thongmee, N; Sumang, R; Pojprapai, S; and Klaytae, T (2018) "Influence of BLT content on phase structure and electrical properties of (1-x)BT-xBLT ceramic," Journal of Metals, Materials and Minerals: Vol. 28: No. 1, Article 15.
Available at: https://digital.car.chula.ac.th/jmmm/vol28/iss1/15