High thermally stable BiFeO3–PbTiO3–BaTiO3 ceramics with improved ferroelectric properties

Abstract

High temperature (0.9-x)BiFeO3–(x)PbTiO3–0.1BaTiO3 (BF–PT–BT) ceramics at MPBs (x = 0.18, 0.20 and 0.22) were synthesized by solid-state reaction technique. Well-saturated P–E loops were obtained and an enhanced ferroelectric behavior of Pr ~60 μC/cm2 and Ec ~50 kV/cm was observed in 0.68BiFeO3–0.22PbTiO3–0.10BaTiO3 ceramics, which was much higher than those of reported BiFeO3–PbTiO3-based and BiFeO3–BaTiO3-based ceramics. The temperature stability of the ceramics was also investigated, showing a high resistivity to thermal depoling, with a degradation temperature Td of ~500 °C. Our results suggested that BF–PT–BT was a good lead-reduced high-temperature ferroelectric ceramics.