Phase formation and properties of doped SBN and SBT solid solutions

Phase formation, structural and electric properties of bismuth layered perovskite like ferroelectric ceramics Sr[Bi1 − xTbx]2[Nb0.9Fe0.05Cr0.05]2O9 − δ (1) and Sr[Bi1 − xTbx]2[Ta0.9Fe0.05Cr0.05]2O9 − δ (2) have been investigated. It has been determined that single phase solid solutions are formed at 0.00 ≤ x ≤ 0.04 (1) and 0.00 ≤ x ≤ 0.30 (2). The perovskite-like structure of all solid solutions obtained is characterized by the orthorhombic symmetry. The volume of the unit cell and TC of solid solutions 1 and 2 has been found to decrease with x increasing.