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http://dx.doi.org/10.4313/JKEM.2011.24.3.194

Dielectric and Piezoelectric Properties of (Na0.5K0.5)0.97NbO3 Ceramics Substituted with CeMnO3  

Oh, Young-Kwang (Department of Electrical Engineering, Semyung University)
Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
Mah, Suk-Burm (Department of Electrical Facilities, Yong-In Songdam College)
Jeong, Yeong-Ho (Department of Electrical Engineering, Chungju National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.24, no.3, 2011 , pp. 194-199 More about this Journal
Abstract
In this study, non-stoichiometric 1-x$[(K_{0.5}Na_{0.5})_{0.97}(Nb_{0.96}Sb_{0.04})O_3]$ + x $CeMnO_3$ + 0.8 mol%CuO + 0.2 wt% $Ag_2O$ (x=0, 0.005) ceramics were prepared by a conventional mixed oxide and carbonate method, their dielectric and piezoelectric properties were investigated with the variations of sintering temperature. As $CeMnO_3$ substitution incereased, the density, piezoelectric constant($d_{33}$) and dielectric constant($\varepsilon_r$) were increased and the mechanical quality factor(Qm) was decreased. At the sintering temperature of $1100^{\circ}C$, the density, electromechanical coupling factor($k_p$), dielectric constant($\varepsilon_r$) and piezoelectric constant($d_{33}$) of 0.5mol% $CeMnO_3$ specimen showed the optimun values of 4.475 $g/cm^2$, 0.437, 552 and 166 pC/N, respectively. However, the mechanical quality factor($Q_m$) showed the minimum value of 380.
Keywords
Non-stoichiometric; Lead-free; Piezoelectric properties; $CeMnO_3$;
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Times Cited By KSCI : 4  (Citation Analysis)
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