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http://dx.doi.org/10.4313/JKEM.2009.22.6.489

Dielectric and Piezoelectric Properties of 0.95(K0.5Na0.5)NbO3-0.05Li(Sb0.8Nb0.2)O3 Ceramics according to the Amount of CuO Addition  

Lee, Yu-Hyung (세명대학교 전기공학과)
Kim, Do-Hyung (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Kim, In-Sung (한국전기연구원 압전소자연구그룹)
Song, Jae-Sung (한국전기연구원 압전소자연구그룹)
Hong, Jae-Il (동서울대학 전기과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.22, no.6, 2009 , pp. 489-494 More about this Journal
Abstract
In this study, In order to improve dielectric and piezoelectric properties of Lead-free piezoelectric ceramics, $0.95(K_{0.5}Na_{0.5})NbO_3-0.05Li(Sb_{0.8}Nb_{0.2})O_3+0.2\;wt%Ag_2O+0.4\;wt%MnO_2+Xwt%CuO$ were investigated as a function of the amount of CuO addition. With increasing the amount of CuO addition, density was increased up to 0.4 wt.% CuO and then decreased above. And also, electro mechanical coupling factor ($k_p$) was decreased. At the 0.4 wt% CuO added specimen sintered at $1020^{\circ}C$, $k_p$, Qm, density, dielectric constant (${\varepsilon}_r$) and $d_{33}$[pC/N] showed the optimal value of $4.37\;g/cm^3$, 0.354, 305, 645, and 144 pC/N respectively.
Keywords
NKN ceramics; CuO addition; Dielectric properties; Piezoelectric properties;
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Times Cited By KSCI : 1  (Citation Analysis)
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