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http://dx.doi.org/10.4313/JKEM.2015.28.3.165

Dielectric and Piezoelectric Properties of PMW-PNN-PZT Ceramics As a Function of ZnO Addition  

Ra, Cheol-Min (Department of Electrical Engineering, Semyung University)
Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.28, no.3, 2015 , pp. 165-169 More about this Journal
Abstract
In this paper, in order to develop the composition ceramics with the excellent dielectric properties, $Pb(Mg_{1/2}W_{1/2})_{0.03}(Ni_{1/3}Nb_{2/3})_{0.09}(Zr_{0.5}Ti_{0.5})_{0.88}O_3$ ceramics were fabricated by the conventional solid-state method. The effects of ZnO addition on their microstructure and piezoelectric properties were systematically investigated. The rhombohedral-tetragonal phase coexistence has been found in the ceramics without ZnO content and then with further increasing ZnO content, specimens exhibited tetragonal phase. The optimized ZnO content formed liquid phase and aided the grain growth of specimens. When 0.4 wt% ZnO was added, the optimal physical properties ($d_{33}=422pC/N$, $d_{31}=161pC/N$, ${\varepsilon}_r=1,905$, $k_p=0.55$, $Q_m=160$) were obtained.
Keywords
ZnO addition; Ceramic; PMW-PNN-PZT; Dielectric properties;
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