Structural and dielectric properties of Sc doped 0.94NBT-0.06BT lead free ceramics.

Lead free piezoelectric ceramics 0.94Na0.5Bi0.5-xScxTiO3−0.06BaTiO3 (x = 0.0, and 0.05) doped with Scandium (Sc) were prepared by a standard solid state reaction. Structural properties of samples were studied using powdered XRD and Raman spectroscopy. The coexistence of rhombohedral and tetragonal phases in both ceramics is observed from the XRD. Dielectric measurements and analysis were performed from room temperature to 450 °C at various frequencies. The relaxor nature of the ceramics was observed with the diffusive phase transition at the dielectric maxima. The substitution of Scandium in NBT-6BT has increased the transition temperatures Td and Tm. [ABSTRACT FROM AUTHOR]