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http://dx.doi.org/10.4313/JKEM.2012.25.6.435

Piezoelectric Properties of Ag2O Doped 0.95(Na,K)NbO3-0.05LiNbO3 Ceramics  

Chae, Moon-Soon (Department of Electronic Materials Engineering, Kwangwoon University)
Shin, Dong-Jin (Department of Electronic Materials Engineering, Kwangwoon University)
Koh, Jung-Hyuk (Department of Electronic Materials Engineering, Kwangwoon University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.25, no.6, 2012 , pp. 435-438 More about this Journal
Abstract
As lead-free piezoelectric materials, $Ag_2O$ doped $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3+x$ mol% (where x = 0, 0.5, 1, 1.5, 2, 2.5 and 3, respectively) ceramics were fabricated by a conventional sintering process. The doping effects on the microstructure and electrical properties of the $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3$ ceramics were systematically investigated. When the 3 mol % $Ag_2O$ doped $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3$ samples were sintered at $1,080^{\circ}C$ for 5 hrs in air, these ceramics showed excellent values of density=4.20 $g/cm^3$, piezoelectric constant ($d_{33}$)=174 pC/N and phase transition temperature$(T_c)=421.6^{\circ}C$, respectively.
Keywords
$Ag_2O$; Lead-free piezoelectric;
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