Electrical properties of SbO-modified BiScO-PbTiO-based piezoelectric ceramics.

Compared with pure Pb-based perovskite ferroelectric materials, BiMeO-PbTiO (Me = Sc, In, and Yb) systems have remarkable advantages in their Curie temperatures. As a member of this group, the BiScO-PbTiO (BS-PT) solid solution has drawn considerable attention from scientists for its high Curie temperature and excellent piezoelectric coefficient. However, BS-PT ceramics still have some shortcomings, such as high dielectric loss and low mechanical quality factor, which make them unsuitable for high-temperature applications. Herein, we report the effect of the addition of complex ions on the electrical properties of BS-PT ceramics. SbO-doped 0.36BiScO-0.64PbTiFeO + 1 mol% MnO (BS-PTFMn + % SbO) ceramics were fabricated and their electrical properties were studied. BS-PTFMn + 0.75% SbO had an optimal piezoelectric coefficient, exhibiting which indicates that SbO doping can improve the piezoelectric properties of the BS-PT ceramics, exhibiting a "soft" effect of SbO doping. In addition, the thermal depolarization temperature ( ) of BS-PTFMn + 0.75% SbO ceramics remained above 300 °C, such as 325 °C for BS-PTFMn + 0.75% SbO. It was concluded that the piezoelectric properties of BS-PT ceramics were enhanced by the addition of SbO.