Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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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)
  • Received : 2011.02.18
  • Accepted : 2011.03.17
  • Published : 2011.04.25
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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.

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