Sodium bismuth titanate (Na0.5Bi0.5TiO3-NBT) is a mixed A-site disordered and distorted ABO3 perovskite discovered by Smolenskii et al. in 1960. At room temperature, it involves a distortion of the ideal cubic structure to rhombohedral due to a rotation of the TiO6 octahedra in an antiphase direction around the rhombohedral axis (Glazer tilt system [a-a-a-]) and a displacement of the Na+/Bi+3 cation from its inversion center. But, what is the exact origin of ferreoelectricity and relaxor behavior in this system.
Dear Dr. Azeez Barzinjy,
In the article that you suggested is discussing more about the morphotropic phase boundary (MPB) in the solid solutions of NBT-BT, NBT-ST systems. But, there is no detailed explanation of occurrence of piezoelectric effect in pure NBT structures.
Could you please explain or suggest any other article ?
Thank you.
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