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Phase Transformation Behavior and Electrical Properties of Pb(Zr 0.56 Ti 0.44 )O 3 –Bi(Zn 0.5 Ti 0.5 )O 3 Solid Solution Ceramics
Author(s) -
Zuo Ruzhong,
Liu Yi,
Su Shi,
Chu Xiangcheng,
Wang Xiaohui
Publication year - 2011
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2011.04699.x
Subject(s) - phase boundary , materials science , tetragonal crystal system , analytical chemistry (journal) , solid solution , dielectric , perovskite (structure) , curie temperature , ferroelectricity , crystallography , lattice constant , phase (matter) , mineralogy , crystal structure , diffraction , chemistry , ferromagnetism , condensed matter physics , metallurgy , physics , optoelectronics , organic chemistry , chromatography , optics
The solid solutions of (1− x )Pb(Zr 0.56 Ti 0.44 )O 3 – x Bi(Zn 0.5 Ti 0.5 )O 3 ((1− x )PZ 56 T 44 – x BZT) were synthesized via a solid‐state reaction method. X‐ray diffraction results indicated that the tetragonality of (1− x )PZ 56 T 44 – x BZT was enhanced with increasing the BZT content, and a morphotropic phase boundary ( MPB ) between rhombohedral and tetragonal ferroelectric phases was identified to be in the range of 0.15 < x < 0.18. In addition, the dielectric diffuseness and frequency dispersion behavior were induced with increasing the BZT content, owing to increased disorder degree of both A‐site and B‐site cations in (1− x )PZ 56 T 44 – x BZT perovskite lattice. Contrary to the case in PT–BZT , the increased tetragonality accompanies reduced Curie temperatures ( T c ) as PZ 56 T 44 was substituted by BZT . The electrical properties of solid solutions exhibit obviously compositional dependence. The optimum dielectric and piezoelectric properties ofε 33T = 1430, d 33 = 365 pC/N, k p = 50%, Q m = 32, and T c = 260°C were achieved in (1− x )PZ 56 T 44 – x BZT ceramics with x = 0.18 owing to the co‐existence of two ferroelectric phases near the MPB .