Influence of cation order on the dielectric properties of (1-x)Pb(Sc0.5Nb0.5)O3-xPb(Yb0.5Nb0.5)O3 ceramics

Ceramic lead niobates and their solid solutions (1 - x)Pb(Sc0.5Nb0.5)O-3-xPb(Yb0.5Nb0.5)O-3 were synthesized by solid state reactions from oxides. The structure of investigated samples was characterized by X-ray diffraction (XRD). Dielectric studies of the ceramics were performed by means of broadband dielectric spectroscopy at the temperature ranging from 600 K to 140 K. For all ceramic samples a diffuse phase transition as well as relaxor ferroelectric behavior were observed.