An investigation of (Na0.5K0.5)NbO3-CaTiO3 based lead-free ceramics and surface acoustic wave devices

被引：52

作者：

Chang, Ren-Chuan ^{[1
]}

Chu, Sheng-Yuan ^{[1
,2
]}

Lin, Yi-Fang ^{[1
]}

Hong, Cheng-Shong ^{[1
,3
]}

Wong, Yi-Peng ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan

[2] Natl Cheng Kung Univ, Ctr Micro Nano Sci & Technol, Tainan 701, Taiwan

[3] Chien Kuo Technol Univ, Dept Elect Engn, Changsha 500, Peoples R China

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 16期

关键词：

sintering; piezoelectric properties; niobates; perovskites; CaTiO3;

D O I：

10.1016/j.jeurceramsoc.2007.02.218

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：

Lead-free (Na0.5K0.5)NbO3 ceramics doped with CaTiO3 (0-3 mol%) have been prepared by the conventional mixed oxide method in this paper. All of the CaTiO3 doped (Na0.5K0.5)NbO3 specimens do not deliquesce as exposed to water for a long time. The samples are characterized by X-ray diffraction analysis, Raman scattering spectra, scanning electron microscopy, and atomic force microscopy. The dielectric, piezoelectric and ferroelectric properties are also investigated. The results show that the addition of CaTiO3 is very effective in preventing the deliquescence and in improving the electric properties of (Na0.5K0.5)NbO3 ceramics. Finally, surface acoustic wave devices based on lead-free ceramics have been successfully fabricated and their characterization is presented. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4453 / 4460

页数：8

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