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- Title
Crystal structure and dielectric properties of (1 − x)(NaBi)TiO · xBi(ZnTi)O perovskite solid solutions.
- Authors
Radyush, Yu.; Olekhnovich, N.; Pushkarev, A.
- Abstract
(1 − x)(NaBi)TiO · xBi(ZnTi)O ceramics have been prepared by solid-state reactions. In the composition range x < 0.2, we obtained (NaBi)TiO-based solid solutions with a rhombohedrally distorted perovskite structure. With increasing x, the degree of rhombohedral distortion, the angle of antiphase tilts of oxygen octahedra about the hexagonal axis in the unit cell, and the octahedral strain decrease systematically and the unit-cell parameters a and c increase. We have studied the dielectric properties of the solid solutions using ceramic samples. The results demonstrate that the ceramics undergo a high-temperature diffuse ferroelectric phase transition. Near the temperature of the maximum in the real part of the dielectric permittivity (510-610 K), the ceramics have low ɛ′ dispersion and low dielectric losses. At low temperatures (below 500 K), the dielectric response of the materials exhibits ferroelectric relaxor behavior.
- Subjects
SOLID solutions; CRYSTAL structure; DIELECTRICS; DIELECTRIC properties of perovskite; CERAMIC powders; TITANIUM compounds; FERROELECTRICITY
- Publication
Inorganic Materials, 2012, Vol 48, Issue 11, p1131
- ISSN
0020-1685
- Publication type
Article
- DOI
10.1134/S0020168512110118