On the structural and electrical properties of modified PbTiO3 ceramics

Ceramics (Pb0.75Ca0.25)[(Ni1/2W1/2)(y)Ti-1-y]O-3 for y = 0.05, 0.10, 0.15 and 0.30 have been prepared using high temperature solid state reaction method. X-ray analyses show that these materials are of single-phase perovskite type tetragonal structure. To solve inaccuracy in finding para-ferroelectric phase transition temperature T-c(epsilon(max)), we have carried out the analyses of the data using a computer program. The role of Ni and W as modifiers on structural and electrical (dielectric and pyroelectric) properties is discussed in terms of the usefulness of these materials. Results indicate that ceramic Pb0.75Ca0.25Ni0.025W0.025Ti0.95O3 is a good candidate for pyroelectric applications.