Effect of Sb5+ on the Properties of (K0.5Na0.5)NbO3 Lead-Free Piezoelectric Ceramics

被引：5
|
作者：
Chen, Qiang [1 ]
Peng, Zhihang [1 ]
Yue, Xi [1 ]
Zhu, Jiliang [1 ]
Xiao, Dingquan [1 ]
Zhu, Jianguo [1 ]
机构：
[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China
来源：
FERROELECTRICS | 2010年 / 404卷
关键词：
NKN; lead free ceramics; alkaline niobate;
D O I：
10.1080/00150193.2010.482438
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Antimony modified (Na0.5K0.5)NbO3 lead-free piezoelectric ceramics were prepared by conventional electroceramic process. The role of Sb5+ in (Na0.5K0.5)NbO3 perovskite structure B site was discussed. The degree of crystalline structural symmetry increased with Sb5+ content increasing, changing from orthorhombic to pseudocubic. As a result, the thermal stability of crystalline structure and ferroelectric properties of (Na0.5K0.5)NbO3 ceramics decreased. (Na0.5K0.5)NbO3 ceramics with 3 mol% Sb5+ displayed enhanced piezoelectric properties, the piezoelectric constant d(33) was 144 pC/N, planar electromechanical coupling coefficient k(p) was 49%, mechanical quality factor Q(m) was 160, and T-c = 344 degrees C, respectively.
引用
收藏
页码：76 / 81
页数：6
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