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http://dx.doi.org/10.4313/TEEM.2011.12.2.72

Dielectric and Piezoelectric Properties of (K0.5Na0.5) (Nb0.97Sb0.03)O3 Ceramics Doped with K4CuNb8O23  

Lee, Sang-Ho (Department of Electrical Engineering, Semyung University)
Lee, Kab-Soo (Department of Electrical Engineering, Semyung University)
Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
Jeong, Yeong-Ho (Department of Electrical Engineering, Chungju National University)
Yoon, Hyun-Sang (Department of Train Electricity, Kookje College)
Publication Information
Transactions on Electrical and Electronic Materials / v.12, no.2, 2011 , pp. 72-75 More about this Journal
Abstract
In this study, $(K_{0.5}Na_{0.5})(Nb_{0.97}Sb_{0.03})O_3+0.9$ mol% $K_{5.4}Cu_{1.3}Ta_{10}O_{29}+x$ mol% $K_4CuNb_8O_{23}$ (x = 0, 0.2, 0.6, 0.8) ceramics were prepared by a conventional mixed oxide method. Their microstructure and electric properties were investigated. The secondary phase was made by virtue of $K_4CuNb_8O_{23}$ (KCN) addition in the $(K_{0.5}Na_{0.5})(Nb_{0.97}Sb_{0.03})O_3$ system ceramics. However, the sinterability of the ceramics increased with increasing $K_4CuNb_8O_{23}$ content. At the 0.6 mol% $K_4CuNb_8O_{23}$ added composition ceramics sintered at $1,060^{\circ}C$, kp and $d_{33}$ showed the optimum values of 0.39 and 145 pC/N, respectively, suitable for piezoelectric actuator application.
Keywords
Lead-free ceramic; $(K_{0.5}Na_{0.5})(Nb_{0.97}Sb_{0.03})O_3$; Electro-mechanical coupling factor (kp); Mechanical quality factor (Qm); Haptic actuator;
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