BiScO3-PbTiO3 (BS-PT) piezoelectric ceramics with high Curie temperature and excellent electrical properties have become one of materials for working in high-temperature environments. The 0.36BS-0.64PT and 1wt%Pb-0.36BS-0.64PT piezoelectric ceramics were prepared by the solid-state reaction. The influences of different sintering processes on the phase structure and properties of the two ceramic components were studied. The optimal sintering and polarization technological were determined. The results showed that the phase composition of ceramic such as increased tetragon and decreased rhombohedral phase content strongly depends on the sintering temperature and soaking time. Through the adjustment of sintering and polarization process, the excellent properties, including Curie temperature TC=454 ℃, piezoelectric constant d33=365 pC/N, electromechanical properties kp=51% were obtained in 1wt%Pb-0.36BS-0.64PT composition ceramics.

BiScO3-PbTiO3 piezoelectric ceramics；preparation technology；structure and performance；non-stoichiometric