Dielectric and Piezoelectric Properties of Low Temperature Sintering PCW-PMN-PZT Ceramics according to MnO 2 Addition

In this study, in order to develop the low temperature sintering ceramics for multilayer piezoelectric transformer, PCW-PMN-PZT ceramics using LiCO, BiO, and CuO as sintering aids were manufactured according to the amount of MnO addition. Their microstructural, dielectric and piezoelectric properties were investigated. When the sintering aids were added, specimens could be sintered below 95, but mechanical qualify factor decreased. Therefore, MnO was added excessively to the PCW-PMN-PZT ceramics to increase mechanical quality factor. At the sintering temperature of 95, the density, dielectric constant(), electromechanical coupling factor(k), mechanical quality factor(Q) and Curie temperature(T) of 0.1 wt% MnO added specimen showed the optimal values of 7.75 g/㎤, 1503, 0.57, 1502, and 337, respectively, for multilayer piezoelectric transformer application.ation.n.