Domain configuration and piezoelectric properties of (K0.50Na0.50)1-xLix(Nb0.80Ta0.20)O3 ceramics

被引：55

作者：

Qin, Yalin ^{[1
,2
]}

Zhang, Jialiang ^{[1
]}

Tan, Yongqiang ^{[1
]}

Yao, Weizeng ^{[1
]}

Wang, Chunlei ^{[1
]}

Zhang, Shujun ^{[2
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Labs Crystal Mat, Jinan 250100, Peoples R China

[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 16期

基金：

中国国家自然科学基金;

关键词：

(K; Na)NbO3-based; Domains; Piezoelectric properties; Domain size; Domain switching; LEAD-ZIRCONATE-TITANATE; X-RAY; TEXTURE;

D O I：

10.1016/j.jeurceramsoc.2014.07.026

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Domain structure plays an important role in determining piezoelectric properties of ferroelectric materials. However, limited studies have been carried out on the domains of (K,Na)NbO3-based lead free ceramics. The domain configuration, domain reversal behavior and piezoelectric properties of (K0.50Na0.50)(1-x)Li-x(Nb0.80Ta0.20)O-3 (KNN-Li-x) ceramics with x = 0.02, 0.035 and 0.05, were studied in this research. It was observed that ceramics with different phases show distinctly different domain configurations and domain reversal behaviors. When compared to other two compositions, x = .0.035 with coexistent orthorhombic-tetragonal phases at room temperature was found to possess curved domain stripes and larger average domain width, leading to optimal piezoelectric properties with d(33)* = 260 pm/V and k(p) = 48%. Based on the microstructures, polarization hysteresis loops and unipolar strain curves under high electric field, it was concluded that the larger domain size and easier domain switching are due to the coexistence of orthorhombic and tetragonal phases, account for the improved properties in KNNT-Li-0.035 ceramics. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：4177 / 4184

页数：8

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