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

页码：76 / 81

页数：6

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