Low-Temperature Sintering and Piezoelectric Properties of (Na0.5K0.5)NbO3 Lead-Free Piezoelectric Ceramics |
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| Authors: | Hwi-Yeol Park In-Tae Seo Jae-Hong Choi Sahn Nahm Hyeung-Gyu Lee |
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| Affiliation: | Department of Materials Science and Engineering, Korea University, Seoul 136-701, Korea;
Korea Electronics Technology Institute, Gyeonggi-do 463-816, Korea |
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| 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 ( E c) and Q m values of the specimens. High-piezoelectric properties of k p=0.37, Q m=755, and ɛ3 T /ɛ0=327 were obtained from the NKNC ceramics containing 1.0 mol% ZnO sintered at 900°C for 2 h. |
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