Abstract
In this study, in order to develop low-temperature sintering ceramics for a multilayer piezoelectric transformer application, we explored CuO and Bi 2O 3 as sintering aids at low temperature (900 °C) sintering condition for Sb, Li and Mn-substituted 0.8Pb(Zr 0.48Ti 0.52)O 3–0.16Pb(Zn 1/3Nb 2/3)O 3–0.04Pb(Ni 1/3Nb 2/3)O 3 ceramics. These substituted ceramics have excellent piezoelectric and dielectric properties such as d 33 ∼ 347 pC/N, k p ∼ 0.57 and Q m ∼ 1469 when sintered at 1200 °C. The addition of CuO decreased the sintering temperature through the formation of a liquid phase. However, the piezoelectric properties of the CuO-added ceramics sintered below 900 °C were lower than the desired values. The additional Bi 2O 3 resulted in a significant improvement in the piezoelectric properties. The composition Sb, Li and Mn-substituted 0.8Pb(Zr 0.48Ti 0.52)O 3–0.16Pb(Zn 1/3Nb 2/3)O 3–0.04Pb(Ni 1/3Nb 2/3)O 3 + 0.5 wt% CuO + 0.5 wt% Bi 2O 3 showed the value of k p = 0.56, Q m = 1042 (planar mode), d 33 = 350 pC/N, when it was sintered at 900 °C for 2 h. These values indicated that the newly developed composition might be suitable for multilayer piezoelectric transformer application.
Published Version
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