Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 ceramics

被引：47

作者：

Ahn, Cheol-Woo

Park, Hwi-Yeol

Nahm, Sahn

Uchino, Kenji

Lee, Hyeung-Gyu

Lee, Hwack-Joo

机构：

[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

[2] Penn State Univ, Mat Res Inst, Int Ctr Actuators & Transducers, University Pk, PA 16802 USA

[3] Korea Elect Technol Inst, Soeongami 463816, Gyeonggi Do, Solomon Islands

[4] Korea Res Inst Stand & Sci, New Mat Evaluat Ctr, Taejon 305600, South Korea

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 2007年 / 136卷 / 01期

关键词：

lead-free piezoelectric ceramics; alkaline niobate; barium titanate;

D O I：

10.1016/j.sna.2006.10.036

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A dense microstructure was developed for the 0.95(Na0.5K0.5)NbO3-0.05BaTiO(3) (0.95NKN-0.05BT) ceramics sintered at above 1050 degrees C. Grain growth was observed in the specimens sintered at 1050-1060 degrees C while a liquid phase was found in the specimens sintered at above 1050 degrees C, which explained the increased sinterability and grain size. KTiNbO5 and Ba6Ti2Nb8O30 second phases were also observed for the specimens sintered at above 1060 degrees C. Evaporation of Na2O was responsible for the formation of the liquid phase and the KTiNbO5 and Ba6Ti2Nb8O30 second phases. Muffling with 0.95NKN-0.05BT powders during the sintering improved the piezoelectric properties, possibly due to the increased poling efficiency resulting from the reduced Na2O evaporation. (C) 2006 Elsevier B.V. All rights reserved.

引用

页码：255 / 260

页数：6

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