Lead-free (1-x)(K_0,48Na_0,48Li_0,04)(Nb_0,95Sb_0,05)O₃-xBi_0.5(Na_0.82K_0.18)_0.5ZrO₃ (KNLNS-xBNKZ) piezoelectric ceramics (x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1) were successfully prepared by the two-step sintering method. The effects of different BNKZ contents on the crystal structure, ferroelectric phase transition, and electrical properties of the as-prepared ceramics were systematically researched. The ceramics with a perovskite structure possessed an orthorhombic phase (space group = Amm2) at x = 0, a mixed orthorhombic-tetragonal phase (Amm2 + P4/mbm) at x = 0.02, a mixed rhombohedral-tetragonal (R-T) phase (R3m + P4/mbm) at x = 0.04–0.06, and a rhombohedral phase (R3m) at x>0.06. At x = 0.04 (rhombohedral and tetragonal (R-T) phases coexisted), the ceramics manifested the best electrical properties with d₃₃ = 224 pC/N, k_p = 0.44, k_t = 0.47, T_C = 218^oC, and remanent polarization (P_r) = 11.5µC/cm². The improvement of the electrical properties of KNLNS-BNKZ ceramics was achieved by controlling their phase compositions and microstructures.

无铅 (1- x )(K _0,48 Na _0,48 Li _0,04 )(Nb _0,95 Sb _0,05 )O ₃ - x Bi _0.5 (Na _0.82 K _0.18 ) _0.5 ZrO ₃ (KNLNS- x BNKZ) 压电陶瓷 ( x = 0、0.02、0.04、0.06、0.08 和 0.1) 通过两步烧结方法成功制备。系统研究了不同BNKZ含量对制备的陶瓷晶体​​结构、铁电相变和电性能的影响。具有钙钛矿结构的陶瓷在x  = 0处具有正交相（空间群 =  Amm 2），在x  = 0.02处具有混合斜方-四方相（Amm 2 +  P 4 / mbm），在x = 0.02 处具有混合菱形-四方相（R - T ) 相位 ( R 3 m  +  P 4 /mbm ) 在x = 0.04–0.06，以及x > 0.06处的菱形相 ( R 3 m ) 。在x  = 0.04（菱形和四方（R - T）相共存）时，陶瓷表现出最好的电性能，d ₃₃  = 224 pC/N, k _p = 0.44, k _t = 0.47, T _C = 218 ^o C，和剩余极化 ( P _r ) = 11.5µC/cm ²。KNLNS-BNKZ陶瓷电性能的改善是通过控制其相组成和微观结构来实现的。