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Phase Diagram and Dielectric Properties of (1–x)Ba(Ti1–yZr y )O3 · xPbTiO3 Ceramics

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Abstract

Ceramic (1–x)Ba(Ti1–yZry)O3 · xPbTiO3 (0 ≤ x, у ≤ 1) samples have been characterized by X-ray diffraction and dielectric measurements. The results have been used to map out the phase diagram of the system, which demonstrates the variation in the phase composition of the samples. It has been shown that, in the composition regions adjacent to the BaTiO3–PbTiO3 side and BaZrO3 corner of the composition triangle, the samples consist of perovskite solid solutions that have tetragonal and cubic structures, respectively, at room temperature. In the intermediate composition region, the samples consist of different perovskite solid solutions similar in composition and structure. We have obtained composition dependences of the unit-cell symmetry and parameters for the solid solutions, their ferroelectric Curie temperature TC, characteristic dielectric relaxation temperatures, dielectric permittivity ε, and dielectric loss tangent tanδ (at temperatures from 100 to 800 K and frequencies from 25 to 106 Hz) and analyzed the evolution of their dielectric properties with increasing BaZrO3 content: from ferroelectric to properties of ferroelectric relaxors, reentrant relaxors, and dielectric relaxors of the dipole glass type.

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Correspondence to A. A. Bush.

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Original Russian Text © A.V. Stepanov, A.A. Bush, K.E. Kamentsev, 2018, published in Neorganicheskie Materialy, 2018, Vol. 54, No. 2, pp. 221–238.

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Stepanov, A.V., Bush, A.A. & Kamentsev, K.E. Phase Diagram and Dielectric Properties of (1–x)Ba(Ti1–yZr y )O3 · xPbTiO3 Ceramics. Inorg Mater 54, 208–219 (2018). https://doi.org/10.1134/S0020168518020140

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  • DOI: https://doi.org/10.1134/S0020168518020140

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