Open AccessEnhanced piezoelectric properties in low-temperature sintering PZN-PZT ceramics by adjusting Zr/Ti ratio
Author(s) -
Yaxia Luo,
Tao Pu,
Shibo Fan,
Liu Hong,
Jianguo Zhu
Publication year - 2022
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x22500011
Subject(s) - materials science , piezoelectricity , tetragonal crystal system , ceramic , phase boundary , sintering , grain size , ferroelectricity , dielectric , relaxation (psychology) , microstructure , phase (matter) , grain boundary , condensed matter physics , composite material , physics , psychology , social psychology , optoelectronics , quantum mechanics
[Formula: see text][Formula: see text]([Formula: see text]Ti)[Formula: see text]([Formula: see text][Formula: see text]O 3 (PZN–PZT) piezoceramics with various Zr/Ti ratios and Li 2 CO 3 sintering aid were sintered at 900 ∘ C by the solid-state reaction route. The samples with different Zr/Ti ratios were compared according to microstructure, phase structure, piezoelectricity, ferroelectricity, and dielectric relaxation. The Zr/Ti ratio in the PZN–PZT ceramics greatly affects the electrical properties. The Zr/Ti ratio affects the proportion between the rhombohedral and tetragonal phases and also affects the grain size. The PZN–PZT ceramics with the Zr/Ti ratio of 53:47 have the largest grain size and have optimized piezoelectric properties ([Formula: see text] = 0.58, [Formula: see text] = 540 pC/N, and [Formula: see text] = 250 ∘ C). The larger the grain size, the lesser the grain boundary, the easier the domain wall motion, and the better the piezoelectric properties. The PZT ceramic with Zr/Ti ratio of 53:47 locates the morphotropic phase boundary (MPB) region which is one of the key factors for the high piezoelectric properties of the PZT.