The Effects of MnO2 Addition on the Physical Properties of Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3-Pb(Mg1/2W1/2)O3-BiFeO3 Ceramics
2021
In this paper, for the application to multi-layer piezoelectric devices capable of being used in piezoelectric speakers, Pb(Ni1/3Nb2/3)O3-Pb(Zr,Ti)O3-BiFeO3 ceramics substituted with Pb(Mg1/2W1/2)O3 were manufactured according to MnO2 addition, and their physical properties were studied. At non-doped MnO2 added specimen, the maximum values of piezoelectric properties were shown, respectively: the er of 2182, d33 of 513 pC/N, and kp of 0.634. When taking into consideration the low dielectric constant and high d33 in case of increasing the numbers of multilayer in ceramics, the x = 0.2 composition ceramics was suitable for the device application such as speaker using low-temperature sintering multilayer piezoelectric actuators.
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