Abstract
In this study, for developing the low temperature sintering ceramics for speaker using piezoelectric actuator, Pb(Mg1/2W1/2)O3-Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3 [PMW-PNN-PZT] ceramics doped with PbO, CuO, and WO3 as sintering aids were manufactured, and their microstructural, dielectric, and piezoelectric properties were investigated. At 0.3 wt% tungsten oxide (=WO3) added specimen sintered at 920 °C, the maximum values of piezoelectric properties were shown, respectively: the dielectric constant (εr) of 2275, piezoelectric constant (d33) of 502 pC/N, electromechanical coupling factor (kp) of 0.644, and mechanical quality factor (Qm) of 57 were suitable for the device application such as haptic display actuator using low temperature sintering multilayer ceramics.
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