文摘
High piezoelectricity was achieved in Ba(Ti0.90Sn0.10)O3 lead-free ceramics by optimizing CuO addition and sintering temperature. The phase structure of 1.0 mol% CuO-doped Ba(Ti0.90Sn0.10)O3 ceramic is coexisting rhombohedral and tetragonal phases as sintered at 1300 °C. The coexistence of rhombohedral, tetragonal and orthorhombic phases appears in 1.0 mol% CuO-doped Ba(Ti0.90Sn0.10)O3 ceramics as sintered at 1350–1450 °C, which leads to highly enhanced d33 up to 650pC/N. This work demonstrates that high piezoelectric property (d33 = 650pC/N) can be obtained in BaTiO3-based lead-free piezoceramics with a simple composition modification by modulating phase structures, which also indicates that Ba(Ti,Sn)O3 is a promising candidate to replace the lead-based piezoceramics.