Crystal growth and ferroelectric property of Na0.5K0.5NbO3 and Mn-doped Na0.5K0.5NbO3 crystals grown by floating zone method

被引：41

作者：

Inagaki, Yumi ^{[1
]}

Kakimoto, Ken-ichi ^{[1
]}

Kagomiya, Isao ^{[1
]}

机构：

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

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2010年 / 30卷 / 02期

基金：

日本学术振兴会;

关键词：

Dielectric properties; Ferroelectric properties; Grain growth; Piezoelectric properties; Single crystal; KNBO3; CRYSTAL; SYSTEM;

D O I：

10.1016/j.jeurceramsoc.2009.05.050

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Na0.5K0.5NbO3 (NKN) and Mn-doped NKN crystals, which are one of the promising candidates of lead-free piezoelectric materials, were grown by using a floating zone (FZ) method. The resulting crystal growth was compared with crystal growth that resulted from using a flux method in a previous study. In the crystal grown by FZ method under where the growth rate was controlled to 3 mm/h, thin layers formed parallel and perpendicular directions to the growth direction. In the crystal grown by FZ method, the crystal structure could not be classified as having the orthorhombic lattice of Amm2, which was observed in the crystal grown using a flux method. It was found that doped Mn was substituted in the perovskite-type lattice of NKN. Pure NKN crystals showed 90 degrees domains that had a zig-zag shape, whereas Mn-doped NKN crystals were aligned to the domain layers in straight lines. It was confirmed that Mn-doped NKN crystal showed a square P-E hysteresis loop. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：301 / 306

页数：6