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Lead-free piezoelectric ceramics with the composition of (1- x )[Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 ]- x Ba(Ti 0.90 Sn 0.10 )O 3  or (1- x )[BNT-0.06BT]- x BTS ternary system (where  x  = 0, 0.01, 0.02, 0.03, 0.04 and 0.05 mol fraction) have been synthesized by a conventional mixed-oxide method. The optimum sintering condition for all samples was found to be 1125 °C/2 h with a heating/cooling rate of 5 °C/min. The relative densities of all samples were ∼98% with the accompanying linear shrinkage of ∼18%. The XRD patterns of all samples showed no detected impurity phase. It was found that the composition of  x  = 0.03 exhibited optimum electrical properties ( ε r = 1895, tan  δ  = 0.0355 and  d 33 = 255 pC/N at room temperature), suggesting that this composition had potential to be a promising lead-free piezoelectric candidate compound for dielectric and piezoelectric applications.

Effects of Ba(Ti 0.90 Sn 0.10 )O 3 on Electrical Properties of Bi 0.5 Na 0.5 TiO 3 -0.06BaTiO 3 Lead-Free Piezoelectric Ceramic System