Phase formation and properties of doped SBN and SBT solid solutions

Abstract Phase formation, structural and electric properties of bismuth layered perovskite like ferroelectric ceramics Sr[Bi 1 −  x Tb x ] 2 [Nb 0.9 Fe 0.05 Cr 0.05 ] 2 O 9 −  δ ( 1 ) and Sr[Bi 1 −  x Tb x ] 2 [Ta 0.9 Fe 0.05 Cr 0.05 ] 2 O 9 −  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 T C of solid solutions 1 and 2 has been found to decrease with x increasing.