Synthesis and study of structural and electrophysical characteristics of piezoceramic section (1-x)(0.8PbMg1/3Nb2/3O3⋅0.2BiScO3)⋅ x(0.8PbTiO3⋅0.2BiScO3) of the ternary system BiScO3-PbTiO3-PbMg1/3Nb2/3O3

X-ray diffraction and dielectric studies were performed on synthesized ceramic samples of the section (1-x) (0.8PbMg(1/3)Nb(2/3)O(3)& sdot;0.2BiScO(3))& sdot; x(0.8PbTiO(3)& sdot;0.2BiScO(3)) with x=0-1 of the ternary BiScO3-PbTiO3-PbMg1/3Nb2/3O3 (BS-PT-PMN) system, including the temperature dependence of thermally stimulated depolarization currents (TSDC). It was found that the samples are solid solutions with a perovskite structure, which have cubic symmetry in the range of x = 0-0.587 and tetragonal symmetry in the range of x = 0.680-1. In the intermediate composition range of x = 0.587-0.680 (morphotropic region - MR), the samples consist of a mixture of solid solutions of different symmetries. Data on the change in dielectric properties and TSDC(T) dependencies of solid solutions with a change in their composition were obtained. It was found that samples of compositions x =0-0.625 and 0.6875-1 exhibit relaxor-ferroelectric and conventional ferroelectric properties, respectively, while samples of compositions x = 0.625-0.6875 combine ferroelectric and relaxor-ferroelectric properties.