Effect of specific features of the phase formation on structural transformations and the formation of properties of solid solutions of the PbZr 1 − x Ti x O 3 (0 < x < 1.00) system

The x - T phase diagram ( T = 25°C) of the PbZr 1 − x Ti x O 3 system has been constructed in the entire solubility range of components 0 ≤ x ≤ 1.00. It has been found that the phase composition of solid solutions, the cell volume decreasing rate, the electrical parameters, and density of ceramics periodically vary with increasing x . It has been shown that the nonmonotonic behavior of the electrical parameters is caused by different contributions of the spontaneous strain dominant in the tetragonal phase and domain reorientations different from 180-degree ones in the rhombohedral phase to their formation. Detailed multifractal parametrization of the grain structure of ceramics has been performed. The microstructure evolution features associated with phase changes in the system have been revealed. The data of other studies that tetragonal phase clusters appear in the range 0.11 < x ≤ 0.12 are confirmed; it has been assumed that rhombohedral phase clusters appear in the range 0.675 < x < 0.80.