Physical Properties of PNN-PMN-PZT Doped with Zinc Oxide and CLBO for Ultrasonic Transducer

In this paper, to develop the ceramics with high d33 and high Qm for ultrasonic transducer applications, 0.10 Pb(Ni1/3Nb2/3)O3-0.07 Pb(Mn1/3Nb2/3)O3 -0.83 Pb(Zr0.5Ti0.5)0.83O3 (PNN-PMN-PZT) ceramics were sintered at 940℃ using CuO-Li2CO3-Bi2O3(CLBO) as a sintering aid by a traditional solid-state technique. The influence of zinc oxide additive on the physical propertiesof the prepared ceramics were systematically investigated. The R-T (rhombohedral-tetragonal) phase coexistence was foundin the ceramics without zinc oxide additive and with increasing amounts of ZnO additive, the specimens showed a tetragonalphase. The formation of a liquid phase between ZnO and Bi2O3 contributed significantly to the grain growth of specimens. For the 0.1 wt% ZnO ceramics, the optimal physical properties of d33= 370 pC/N,εr = 1,344, kp= 0.621, and Qm= 1,523 wereobtained. KCI Citation Count: 2