Piezoelectric properties of low-temperature sintered Li-modified (Na, K)NbO3 lead-free ceramics

被引：162

作者：

Wang, Ke ^{[1
]}

Li, Jing-Feng ^{[1
]}

Liu, Nan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 09期

关键词：

D O I：

10.1063/1.2977551

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

LiNbO3-doped (Na, K)NbO3 lead-free piezoceramics were prepared by conventional sintering at a temperature as low as 950 degrees C using excess Na2O additives. The crystal structure changed from orthorhombic to tetragonal with increasing LiNbO3 amount since the phase transition temperature TO-T shifted downward. In the region of two-phase coexistence, enhanced piezoelectric constant d(33) (280 pC/N) and electromechanical coupling factor k(p) (48.3%) with a high Curie temperature T-C (475 degrees C) were obtained in the nominal composition 0.92(Na0.535K0.48)NbO3-0.08LiNbO(3). Our results open up the way to low-temperature sintering of (Na, K)NbO3-based lead-free piezoceramics with high performance. (c) 2008 American Institute of Physics.

引用

页数：3

共 30 条

[1] Effects of Li content on the phase structure and electrical properties of lead-free (K0.46-x/2Na0.54-x/2Lix)(Nb0.76Ta0.20Sb0.04)O3 ceramics [J].