A correlative study on strain and variation of coercive field in lead-free (Na0.5Bi0.5)TiO3-Bi(Mg0.5Zr0.5)O-3-Bi(Mg0.5Ti0.5)O-3 ternary system

作者：Ruth D E Jain^*; Sundarakannan B

来源：Journal of Materials Science: Materials in Electronics , 2017, 28(21): 15907-15914.

DOI：10.1007/s10854-017-7486-1

Sodium bismuth titanate-bismuth magnesium zirconate-bismuth magnesium titanate (NBT-BMZ-BMT) lead-free ternary ceramics are prepared by solid-state reaction method. Consequence on structural, dielectric, ferroelectric properties and piezoelectric coefficient is investigated. Single phase rhombohedral R3c phase is retained in all poled samples. Coercive field decreases due to minimum homogeneous strain (delta) which facilitates domain reorientation and domain switching. Reduced homogeneous strain is the key factor which lowers the coercive field and enhances the dielectric constant. NBT-BMZ-BMT ternary ceramics reduces the coercive field and possesses high remnant polarization, dielectric constant and piezoelectric coefficient-the important requirement in functional devices.

• 出版日期2017-11