![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
A new methodology, based on birefringent light scattering, has been developed. It allows to determine qualitatively the dependence of the mean size of polar regions as function of temperature. Dielectric and light-scattering measurements are performed in PLZT (6–8)/65/35 ceramics in order to refine the phase diagram. A spontaneous relaxor-ferroelectric phase transition takes place in PLZT (6–7)/65/35 at temperature lower than the temperature of the dispersive dielectric constant maximum. At this temperature the mean size of polar regions ‘‘a'’ essentially increases to a > λ = 0.63 μm.