Abstract
Lead free 0.95[(K0.5Na0.5)1−xAgxNbO3]–0.05LiSbO3 (KNAN–LS) ceramics with x = 0, 0.02, 0.04, 0.06 and 0.08 have been synthesized by conventional solid state reaction route (CSSR). X-ray diffraction (XRD) analysis confirmed the transformation of mixed structure to pure tetragonal structure with the increase in Ag content in KNN–LS ceramics. The Curie temperature (Tc) of the ceramics decreased from 385.5 °C to 331 °C with the increase in silver (Ag) content. The poling temperature was optimized for better piezoelectric properties. The KNAN–LS ceramics with x = 0.06 showed better piezoelectric and ferroelectric properties (d33 = 227 pC/N, kp = 42.5%, Tc = 368 °C and Pr = 21.9 μC/cm2).
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