J. Phys. IV France 128 (2005) 3-6
Structural and ferroelectric study of Na0.5Bi0.5TiO3-BiScO3 systemE. Boucher, P. Marchet and J.P. Mercurio
SPCTS, UMR 6638, Faculté des Sciences et Techniques, Université de Limoges, 123 avenue Albert Thomas, 87060 Limoges Cedex, France
Lead free ceramics [ (Na0.5Bi0.5TiO (BiScO to 0.25] were prepared following the conventional mixed oxide route. The effect of incorporated BiScO3 on the structure, lattice parameters and electrical properties of the NBT-BS system has been studied. The increase of the lattice parameters with x is linked to the increase of the mean ionic radii in the B-site of the perovskite structure. The Sc-Ti substitution increases the disorder in the cationic sublattice which involves an increase of the diffuseness of the structural phase transition at T.
© EDP Sciences 2005