Dielectric, ferroelectric and pyroelectric properties of Pb[(Ni1/3Sb2/3)(x)TiyZrz]O-3 ceramics

摘要

In the present study, various Pb[(Ni1/3Sb2/3)(x)Ti(y)Z(r)]O-3 where x+y+z = 1, x = 0.08 and y = 0.44-0.49, ceramics in the morphotropic phase boundary (MPB) range were studied by dielectric and pyroelectric methods. The results of the investigations revealed an MPB composition range of y congruent to 0.46. The study of the dielectric properties of these compounds as a function of temperature suggests that with increase in y the permittivity maximum increases and transition temperature shifts towards higher temperature. Well-saturated polarization versus electric field (P-E) hysteresis loops were obtained and values of P, were calculated. The samples revealed good pyroelectric properties for y = 0.44 and y = 0.45 at room temperature with large figures of merit F-v = 0.019 m(2)/C and F-D = 1.34 x 10(-5)Pa(1/2).