Effect of composition and pressure on dielectric property in the Sn-modified lead zirconate titanate ceramics

A detailed study of composition and hydrostatic pressure on the Pb0.97La0.02[(Zr1−xSnx)Ti0.114]O3 (x = 0.13,0.19,0.21,0.25) ceramics has provided a detailed view of the dielectric response and phase transition of the technologically important material. The incommensurateness of Sn4+ has a great influence of the BOCT (BO6 octahedral in perovskite ABO3) in the complex perovskite structure. The more Sn doped, the more obvious the character of antiferroelectric behaves and the lower the transformation pressure becomes. The electric energy can be released under the pressure from polarized ferroelectric state to antiferroelectric state. With increasing Sn concentration, the phase transition pressure decreases from 300 to 100 MPa. Dielectric properties were measured as a function of hydrostatic for poled samples. Because of the substitution at the A site, there existed the behavior of dielectric frequency dispersion. Dielectric measurement has the same phase transition point as the test result in the hydrostatic depoling.