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 Properties of Ag2O Doped 0.95(Na,K)NbO3-0.05LiNbO3 Ceramics

Ag2O 첨가량에 따른 0.95(Na,K)NbO3-0.05LiNbO3 세라믹스의 압전 특성

  • Chae, Moon-Soon (Department of Electronic Materials Engineering, Kwangwoon University) ;
  • Shin, Dong-Jin (Department of Electronic Materials Engineering, Kwangwoon University) ;
  • Koh, Jung-Hyuk (Department of Electronic Materials Engineering, Kwangwoon University)
  • 채문순 (광운대학교 전자재료공학과) ;
  • 신동진 (광운대학교 전자재료공학과) ;
  • 고중혁 (광운대학교 전자재료공학과)
  • Received : 2012.05.21
  • Accepted : 2012.05.25
  • Published : 2012.06.01
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Abstract

As lead-free piezoelectric materials, $Ag_2O$ doped $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3+x$ mol% (where x = 0, 0.5, 1, 1.5, 2, 2.5 and 3, respectively) ceramics were fabricated by a conventional sintering process. The doping effects on the microstructure and electrical properties of the $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3$ ceramics were systematically investigated. When the 3 mol % $Ag_2O$ doped $0.95(K_{0.5}Na_{0.5})NbO_3-0.05LiNbO_3$ samples were sintered at $1,080^{\circ}C$ for 5 hrs in air, these ceramics showed excellent values of density=4.20 $g/cm^3$, piezoelectric constant ($d_{33}$)=174 pC/N and phase transition temperature$(T_c)=421.6^{\circ}C$, respectively.

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References

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