J. Phys. IV France
Volume 128, September 2005
Page(s) 3 - 6

J. Phys. IV France 128 (2005) 3-6

DOI: 10.1051/jp4:2005128001

Structural and ferroelectric study of Na0.5Bi0.5TiO3-BiScO3 system

E. 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 $_{3})_{\rm (1-x)}$(BiScO $_{3})_{\rm x}$ ${\rm x}=0$ 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$_{\rm c}$.

© EDP Sciences 2005