Bismuth sodium titanate, (Bi0.5Na0.5)TiO3 or BNT, is a lead-free ferroelectric material and a candidate for piezoelectric and pyroelectric applications [1]. It was discovered by Smolenskii et al. in 1960 [2]. BNT showed strong ferroelectric properties at room temperature due to its large remanent polarization, Pr = 38 µC/cm2 and high coercive field, Ec = 7.3 kV/mm [3]. Pure BNT was rather difficult to be poled to achieve saturate polarization. This material’s properties were therefore often improved by forming solid solution with other compounds such as NaNbO3 or BaTiO3 [4-6]. Another way was by doping a small amount a rare-earth or alkaline-earth element. Currently, A-site substitution with cations such as Ba2+, Sr2+ or La3+ was found to reduce coercive field and increase the strength of the spontanouse polarization, thus improving its ferroelectric properties [7-8].
Bismuth sodium titanate, (Bi0.5Na0.5)TiO3 or BNT, is a lead-free ferroelectric material and a candidate for piezoelectric and pyroelectric applications [1]. It was discovered by Smolenskii et al. in 1960 [2]. BNT showed strong ferroelectric properties at room temperature due to its large remanent polarization, Pr = 38 µC/cm2 and high coercive field, Ec = 7.3 kV/mm [3]. Pure BNT was rather difficult to be poled to achieve saturate polarization. This material’s properties were therefore often improved by forming solid solution with other compounds such as NaNbO3 or BaTiO3 [4-6]. Another way was by doping a small amount a rare-earth or alkaline-earth element. Currently, A-site substitution with cations such as Ba2+, Sr2+ or La3+ was found to reduce coercive field and increase the strength of the spontanouse polarization, thus improving its ferroelectric properties [7-8].
การแปล กรุณารอสักครู่..
