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Structure, electrical, and thermal expansion properties of PZ nTe– PZT ternary system piezoelectric ceramics
Author(s) -
Huang Xiang,
Zeng Jiangtao,
Ruan Xuezheng,
Zheng Liaoying,
Li Guorong
Publication year - 2018
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/jace.15179
Subject(s) - thermal expansion , materials science , negative thermal expansion , phase boundary , dielectric , ceramic , piezoelectric coefficient , tetragonal crystal system , microstructure , ferroelectricity , phase (matter) , analytical chemistry (journal) , phase transition , temperature coefficient , mineralogy , composite material , thermodynamics , chemistry , optoelectronics , organic chemistry , physics , chromatography
x P b(Zn 0.5 Te 0.5 )O 3 –(1− x )Pb(Zr 0.5 Ti 0.5 )O 3 ( PZ nTe– PZT ) ceramics were prepared by the solid‐state reaction method. The phase structure, microstructure, ferroelectric and dielectric properties and thermal expansion properties were systematically investigated. X‐ray diffraction analysis showed the morphotropic phase boundary ( MPB ) existed at the composition of x = 0.08, which was the coexistence of the rhombohedral phase and the tetragonal phase. The grain size of ceramics decreased rapidly from 10‐20 μm to 1‐3 μm when the PZ nTe was added in. The PZ nTe– PZT ceramics at the MPB composition showed the largest high field effective piezoelectric coefficient d 33∗and the lowest strain hysteresis H . The dielectric permittivity and phase transition temperature exhibited strongly compositional dependence. A good linear relation was shown in T m temperature vs x content and a DPT behavior was found in x PZnT e–(1− x ) PZT ( x = 0.02‐0.08). The thermal expansion properties showed a low thermal expansion coefficient in the low temperature while a high thermal expansion coefficient in the high temperature. Besides, the thermal expansion curve also showed the characteristic of DPT in PZ nTe– PZT ceramics.