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http://dx.doi.org/10.4313/JKEM.2008.21.10.906

Piezoelectric and Dielectric Properties of Low Temperature Sintering (K0.5Na0.5)NbO3 Ceramics according to Sintering Aid Li2CO3  

Lee, Il-Ha (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.21, no.10, 2008 , pp. 906-910 More about this Journal
Abstract
$(K_{0.5}Na_{0.5})NbO_3$ (NKN) ceramics doped with $Li_{2}CO_3$ as sintering aids were manufactured in order to develop the low temperature sintering ceramics for piezoelectric device. The sintering aids were proved to lower the sintering temperature of doped NKN ceramics due to the effect of $Na_{2}CO_{3}-Li_{2}CO_3$ liquid phase. All the specimens showed the orthorhombic phase without secondary phase. And also, the piezoelectric properties of specimens were improved with increasing $Li_{2}CO_3$ contents. At sintering temperature of $930^{\circ}C$, the density, electromechanical coupling factor (kp), mechanical quality factor (Qm) and dielectric constant(${\epsilon}_{\gamma}$), piezoelectric constant of 0.3 wt.% $Li_{2}CO_3$ added specimen showed the optimum values of $4.255 g/cm^3$, 0.37, 234, 309, 136 pC/N, respectively.
Keywords
$(K_{0.5}Na_{0.5})NbO_3$; Sinterig aid $Li_{2}CO_3$; Low temperature sintering;
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Times Cited By KSCI : 1  (Citation Analysis)
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