Abstract
Polycrystalline ( Pb 1-x Sr x) TiO 3 (PST) (x = 0.25, 0.50) ceramics were synthesized by the solid-state reaction method. PST sintering temperatures ranged between 1050–1250°C. The samples were characterized by X-ray diffractometer (XRD) and scanning electron microscopy (SEM). The sintered pellets showed pure perovskite in all samples. The lattice parameter c increased, while the lattice parameter a decreased with increasing sintering temperatures. The tetragonality and average grain sizes increased when sintering temperatures were increased. The dielectric constants vs temperature curves of PST ceramics with x = 0.25 and x = 0.50 associated with the ferroelectric to paraelectric phase transition, showed a maximum peak at around 311 and 139°C, respectively. The dielectric constants of both compositions were related with their densities.
Published Version
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