Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Piezoelectric and Dielectric Properties of 0.97[(K0.5Na0.5)(Nb0.97Sb0.03)O3]-0.03[(Bi0.5K0.5)TiO3] Ceramics Modified with K5.4Cu1.3Ta10O29

K5.4Cu1.3Ta10O29 첨가에 따른 0.97[(K0.5Na0.5)(Nb0.97Sb0.03)O3]-0.03[(Bi0.5K0.5)TiO3] 세라믹스의 압전 및 유전 특성

  • Lee, Kab-Soo (Department of Electrical Engineering, Semyung University) ;
  • Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
  • Received : 2011.06.01
  • Accepted : 2011.08.22
  • Published : 2011.09.01
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Abstract

In this study, piezoelectric and dielectric properties of Lead-free $0.97[(K_{0.5}Na_{0.5})(Nb_{0.97}Sb_{0.03})O_3]+0.03[(Bi_{0.5}K_{0.5})TiO_3]$ (abbreviated as 0.97NKNS-0.03BKT)ceramics synthesized by conventional solid-state reaction process were investigated as a function of $K_{5.4}Cu_{1.3}Ta_{10}O_{29}$ addition. The results indicated that the $K_{5.4}Cu_{1.3}Ta_{10}O_{29}$ addition significantly improved the sinterability, grain growth and piezoelctric properties of 0.97NKNS-0.03BKT ceramics. The optimum values as planar piezoelectric coupling coefficient ($k_p$= 0.355), piezoelectric constant ($d_{33}$= 207 pC/N) and mechanical quality factor ($Q_m$= 128) were obtained when 0.009KCT was added. The electromechanical coupling factor($k_p$) was slightly decreased according to the increasing temperature.

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References

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