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January 25th, 2010

Low-Temperature Sintering and Piezoelectric Properties of (Na0.5K0.5)NbO3 Lead-Free Piezoelectric Ceramics

Published on January 25th, 2010 | By: pwray@ceramics.org

Volume 93 Issue 1, Pages 36 – 39

 

Hwi-Yeol Park, In-Tae Seo, Jae-Hong Choi, Sahn Nahm, Hyeung-Gyu Lee
Published Online: Oct 6 2009 11:48AM
DOI: 10.1111/j.1551-2916.2009.03359.x

 

ABSTRACT
(Na0.5K0.5)NbO3 (NKN) ceramic with 1.5 mol% CuO added (NKNC) was well sintered even at a low temperature of 900°C with the addition of ZnO. Most of the ZnO reacted with the CuO and formed the liquid phase that assisted the densification of the specimens at 900°C. A few Zn2+ ions entered the matrix of the specimens and increased the coercive field (Ec) and Qm values of the specimens. High-piezoelectric properties of kp=0.37, Qm=755, and ɛ3T/ɛ0=327 were obtained from the NKNC ceramics containing 1.0 mol% ZnO sintered at 900°C for 2 h.

 

Online Access to Journal of the American Ceramic Society


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