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http://dx.doi.org/10.4313/JKEM.2008.21.10.901

Dielectric and Piezoelectric Characteristics of (Na,K)NbO3 Ceramics System According to Sintering Time  

Kim, Do-Hyung (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Kim, In-Sung (한국전기연구원 압전소자그룹)
Song, Jae-Sung (한국전기연구원 압전소자그룹)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.21, no.10, 2008 , pp. 901-905 More about this Journal
Abstract
In this study, $0.95(K_{0.5}Na_{0.5})NbO_{3}-0.05Li(Sb_{0.8}Nb_{0.2})O_{3}+0.2\;wt%Ag_{2}O$ were investigated as a variations of sintering times in order to improve dielectric and piezoelectric properties of lead-free piezoelectric ceramics. $Ag_{2}O$ were used as sintering aids and the specimens were sintered during 3, 5, 7, 9 and 11 hours, respectively. At the specimen sintered during 7 hour, Electromechanical coupling factor ($k_p$), density, dielectric constant (${\epsilon}_{\gamma}$), piezoelectric constant ($d_{33}$) and curie temperature ($T_c$) of composition ceramics showed the optimal value of 0.450, 4.274 $[g/cm^3]$, 1007, 257 [pC/N] and $396^{\circ}C$, respectively.
Keywords
Lead-free piezoelectric ceramics$(Na,K)NbO_3$; Sintering times; Grain size; Electromechanical coupling factor; Dielectric constant;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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