Microstructure and Electrical Properties of Eu-Doped K0.5Na0.5NbO3 Ceramics

被引：0
|
作者：
Zhang, Li-Hua [1 ,2 ]
Wang, Shu-Lin [1 ]
Cheng, Xue-Liang [1 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Sch Mech Engn, Zhenjiang 212003, Jiangsu, Peoples R China
来源：
FERROELECTRICS | 2015年 / 486卷 / 01期
关键词：
Lead-free ceramics; dielectric; piezoelectric; ferroelectric; PHASE-TRANSITION; DIELECTRIC-PROPERTIES; PIEZOELECTRIC PROPERTIES;
D O I：
10.1080/00150193.2015.1100913
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
(K0.5Na0.5)(1-3x)EuxNbO3 (0 <= x <= 0.05) lead-free ceramics have been prepared by a conventional solid state reaction. XRD show that the ceramics possess a pure perovskite structure with orthorhombic symmetry. Dopant Eu restrains the grain growth, decreases the ferroelectric-paraelectric phase transition temperature and leads to a diffuse phase transition. With the increase of Eu, the observed remanent polarization (Pr) decreases while the coercive field (E-c) remains almost unchanged. Nevertheless, for the increase in relative permittivity, the sample with x = 0.005 exhibits the optimum piezoelectric properties, giving a large piezoelectric coefficient (d(33) = 121 pC/N) and a high planar electromechanical coupling coefficient (kp D 0.41).
引用
收藏
页码：168 / 174
页数：7
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