Affiliation:
1. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, P. R. China
Abstract
[Formula: see text][Formula: see text]([Formula: see text]Ti)[Formula: see text]([Formula: see text][Formula: see text]O3 (PZN–PZT) piezoceramics with various Zr/Ti ratios and Li2CO3 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.
Funder
Sichuan Science and Technology Program
Fundamental Research Funds for the Central Universities
National Natural Science Foundation of China
Publisher
World Scientific Pub Co Pte Ltd
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Ceramics and Composites,Electronic, Optical and Magnetic Materials
Cited by
21 articles.
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