Dielectric and piezoelectric properties of lead-free (Na0.5K0.5)NbO3-SrTiO3 ceramics

被引：351

作者：

Guo, YP ^{[1
]}

Kakimoto, K ^{[1
]}

Ohsato, H ^{[1
]}

机构：

[1] Nagoya Inst Technol, Grad Sch Engn, Dept Mat Sci & Engn, Shikumi Coll,Showa Ku, Nagoya, Aichi 4668555, Japan

来源：

SOLID STATE COMMUNICATIONS | 2004年 / 129卷 / 05期

关键词：

NKN-ST ceramics; dielectric properties; piezoelectric properties;

D O I：

10.1016/j.ssc.2003.10.026

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

In this article, we report successful preparation of dense [(Na0.5K0.5)(1-x)Sr-x](Nb1-xTix)O-3 (x = 0.005-0.100) ceramics by ordinary sintering in air. The dependence of phase structure on doping content of SrO and TiO2 has been determined by the X-ray diffraction technique. It was found that the crystal structure changed from orthorhombic to tetragonal at x approximate to 0.040. Dielectric study revealed that the dielectric relaxor behavior was induced by doping of SrO and TiO2 into (Na0.5K0.5)NbO3. The samples in the composition range from x = 0.005 to 0.020 exhibited excellent electrical properties, piezoelectric constant of d(33) = 90-96 pC/N, electromechanical planar and thickness coupling coefficients of k(p) = 26.6-32.5% and k(l) = 39.8-43.8%. The results show that the [(Na0.5K0.5)(1-x)Sr-x](Nb1-xTix)O-3 ceramics are one of the promising lead-free materials for electromechanical transducer applications. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：279 / 284

页数：6

共 24 条

[1] Impurity-induced ferroelectric relaxor behavior in quantum paraelectric SrTiO3 and ferroelectric BaTiO3 [J].