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http://dx.doi.org/10.4313/JKEM.2009.22.11.925

Dielectric and Piezoelectric Characteristics of 0.95(K0.5Na0.5)NbO3-0.05Li(Sb0.8Nb0.2)O3 Pb-free Ceramics with amount of Ag2O Addition  

Kim, Do-Hyung (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Jeong, Yeong-Ho (충주대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.22, no.11, 2009 , pp. 925-929 More about this Journal
Abstract
In this study, $0.95(K_{0.5}Na_{0.5})NbO_3-0.05Li(Sb_{0.8}Nb_{0.2})O_3$ ceramics were investigated as a function of the amount of $Ag_2O$ addition in order to improve dielectric and piezoelectric properties of lead-free piezoelectric ceramics. With increasing the amount of $Ag_2O$ addition, density and electromechanical coupling factor ($k_p$) increased up to 0.2 wt.% $Ag_2O$ and decreased above 0.2 wt.% $Ag_2O$. At the sintering temperature of $1020^{\circ}C$, electromechanical coupling factor ($k_p$), density, dielectric constant (${\varepsilon}r$) and curie temperature (Tc) of ceramics with 0.2 wt% $Ag_2O$ showed the optimal values of 0.42, $4.33\;g/cm^3$, 738 and $393^{\circ}C$, respectively.
Keywords
Lead-free ceramics; Piezoelectric constant; $(Na,K)NbO_3$; Electromechanical coupling factor; Dielectric constant;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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