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http://dx.doi.org/10.4313/JKEM.2005.18.3.243

Piezoelectric and Dielectric Characteristics of Low Temperature Sintering PNW-PMN-PZT Ceramics according to CaCO3Addition  

Yoo, Ju-Hyun (세명대학교 전기공학과)
Lee, Sang-Ho (세명대학교 전기공학과)
Lee, Chang-Bae (세명대학교 전기공학과)
Song, Hyun-Sun (세명대학교 전기공학과)
Chung, Kwang-Hyun (인하대학교 전기공학과)
Jeong, Yeong-Ho (한전전력연구원)
Park, Durk-Won (세명대학교 컴퓨터과학과)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.3, 2005 , pp. 243-247 More about this Journal
Abstract
In this study, in order to develop low temperature sintering ceramics for ultrasonic vibrator application, PNW-PMN-PZT system ceramics were manufactured according to the amount of CaCO$_3$ addition, and their piezoelectric, dielectric and microstructural characteristics were investigated. The ceramic specimens could be sintered at sintering temperature below 1000 $^{\circ}C$ due to the effect of Li$_2$CO$_3$-CaCO$_3$ liquid phase produced by the reaction of Li$_2$CO$_3$ and CaCO$_3$. At 0.2 wt% Li$_2$CO$_3$ and 0.25 wt％ CaCO$_3$ added specimen sintered at 920 $^{\circ}C$, the density, electromechanical coupling factor(k$_{p}$), mechanical quality factor(Q$_{m}$) and dielectric constant showed the optimal value of 7.78 g/㎤, 0.49, 1396, and 1300, respectively, for ultrasonic vibrator application.ion.
Keywords
Ultrasonic vibrator; Sintering aids; Liquid phase; Electromechanical coupling factor;
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