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http://dx.doi.org/10.4313/JKEM.2005.18.2.136

Dielectric and Piezoelectric Properties of Low Temperature Sintering PCW-PMN-PZT Ceramics according to MnO2 Addition  

Chung, Kwang-Hyun (인하대학교 전기공학과)
Lee, Duck-Chool (인하대학교 전기공학과)
Lee, Chang-Bae (세명대학교 전기공학과)
Lee, Sang-Ho (세명대학교 전기공학과)
Yoo, Ju-Hyun (세명대학교 전기공학과)
Lee, Hyeung-Gyu (전자부품연구원)
Kang, Hyung-Won (전자부품연구원)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.18, no.2, 2005 , pp. 136-141 More about this Journal
Abstract
In this study, in order to develop the low temperature sintering ceramics for multilayer piezoelectric transformer, PCW-PMN-PZT ceramics using Li$_2$CO$_3$, Bi$_2$O$_3$, and CuO as sintering aids were manufactured according to the amount of MnO$_2$ addition. Their microstructural, dielectric and piezoelectric properties were investigated. When the sintering aids were added, specimens could be sintered below 95$0^{\circ}C$, but mechanical qualify factor decreased. Therefore, MnO$_2$ was added excessively to the PCW-PMN-PZT ceramics to increase mechanical quality factor. At the sintering temperature of 95$0^{\circ}C$, the density, dielectric constant($\varepsilon$$_{r}$), electromechanical coupling factor(k$_{p}$), mechanical quality factor(Q$_{m}$) and Curie temperature(T$_{c}$) of 0.1 wt% MnO$_2$ added specimen showed the optimal values of 7.75 g/㎤, 1503, 0.57, 1502, and 337, respectively, for multilayer piezoelectric transformer application.ation.n.
Keywords
Low temperature sintering ceramics; $k_p$; $Q_m$; $MnO_2$ addition; Piezoelectric Properties;
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