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

页码：168 / 174

页数：7