Dielectric and pyroelectric properties of (Pb1-xBax) (Zr0.70Ti0.30) O-3 [x=0.25 divided by 0.35] ceramics exhibiting the relaxor ferroelectrics behaviour

Dielectric constant, loss factor and remanent polarization were investigate d as a function of temperature for PBZT - type ceramics with Zr/Ti ratio eq ual 70/30 and Ba contents x = 0.25+0.35. Additionally measurements of pyroe lectric and thermally stimulated depolarization currents were carried out. The reported experimental results obtained reveal the relaxor ferroelectric s behaviour of the studied ceramics. The physical processes leading to the relaxor behaviour are discussed in this paper. The Bi-doped PBZT ceramics w ere also investigated. A small amount of this dopant caused considerable im provement in thr quality of the ceramics and their relaxor behaviour.