Synthesis and dielectric behavior of lead-free (Na0.5Bi0.5)(1-x)BaxTi1-yTayO3 piezoelectric ceramics

Solid solution of (Na0.5Bi0.5)(1-x)BaxTi1-yTayO3 in the composition range x = 0.06 and 0.0 LT = y LT = 0.05 were prepared by conventional ceramics sintering technique. These new group of lead-free piezoelectric ceramic were studied for their crystal structure, dielectric and piezoelectric properties. It is shown that the system possess pure perovskite phase in its as calcined state. A morphotropic phase boundary (MPB) between tetragonal and rhombohedral phases appears at x = 0.06 and y = 0.05. The room temperature measurements of dielectric and piezoelectric properties reveal that the obtained ceramics with MPB composition has potential for use as piezoelectric material