The piezoelectric ceramics with outstanding piezoelectric properties and high Curie temperature are significantly applied to the severe condition of high temperature, and it is one of the mostly researched piezoelectric and ferroelectric ceramics nowadays. It is briefly summarized that the factors influence the curie temperature and piezoelectric, dielectric properties of piezoelectric ceramics, focused on binary system of BiScO_3-PbTiO_3(BSPT) with perovskite structure, where the researching progress of th...