By introducing Ni ion into the Bsite of perovskite lattice, (K 0.47 Na 0.51 Li 0.02 )(Nb 0.94¹x Sb 0.06 Ni x )O 3 (KNN-LSN, x = 0, 0.002, 0.005, and 0.008) Pb-free piezoceramics were prepared by solid state reaction method. The effect of Ni doping amounts on the structure and electrical properties of KNN-LSN ceramics were investigated. XRD results showed that all ceramics had pure orthorhombic perovskite structure. The introduction of Ni ion into Bsite of KNN-LSN ceramics effectively improved

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... e electrical properties. The optimal electrical properties of d 33 = 192 pC/N, k p = 38.6%, Q m = 128, ¾ r = 756, tan ¤ = 0.025, P r = 25.6¯C/cm 2 , and E c = 1.21 kV/mm were obtained when Ni doping amount x = 0.005, indicating that this ceramic was a promising Pb-free candidate for practical use.