Enhanced electrical properties of (1-x)(K_0.48Na_0.48Li_0.04)(Nb _0.95Sb_0.05)O₃-xBi_0.5(Na0.4K_0.1)TiO₃ ceramics through structural phase modification

Lead-free (1-x)(K0.48Na0.48Li0.04)(Nb0.95Sb0.05)O-3-xBi(0.5)(Na0.4K0.1)TiO3 (KNLNS-xBNKT) ceramics were synthesized following a two-step sintering method. We focused on studying the effect of Bi-0.5(Na0.4K0.1)TiO3 on the structural phase modification process and the physical properties of lead-free KNLNS-xBNKT ceramics to optimize the BNKT content to improve the physical properties of the ceramic materials. The experimental results reveal that the physical properties of the 0.98KNLNS-0.02BNKT ceramics were the best at the optimum BNKT content of 0.02 mol, the density (rho) was recorded to be 4.55 g/cm(3), the k(p) value was 0.35, the epsilon(r) value was 1287, d(33) value was 217 pC/N, the Q(m) value was 108, and the P-r value was 15.3 mu C/cm(2). Additionally, the value of S-max (0.17%) and d(33)* (374 pm/V) increased significantly when the BNKT content was 0.03 mol.