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The (Na0.52K0.435 Li0.045)Nb0.87Sb0.08Ta0.05O3 (KNNLST) + x wt% LiF piezoelectric ceramics, where x = 0, 2, 4, and 6, have been fabricated successfully by the conventional solid-state reaction method. The effect of LiF on the sintering temperature, the st