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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Dielectric and Piezoelectric Properties of (Na0.5K0.5)0.97NbO3 Ceramics Substituted with CeMnO3

CeMnO3 치환된 (Na0.5K0.5)0.97NbO3 세라믹스의 유전 및 압전 특성

  • Oh, Young-Kwang (Department of Electrical Engineering, Semyung University) ;
  • Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University) ;
  • Mah, Suk-Burm (Department of Electrical Facilities, Yong-In Songdam College) ;
  • Jeong, Yeong-Ho (Department of Electrical Engineering, Chungju National University)
  • 오영광 (세명대학교 전기공학과) ;
  • 류주현 (세명대학교 전기공학과) ;
  • 마석범 (용인송담대학 조명인테리어학과) ;
  • 정영호 (충주대학교 전기공학과)
  • Received : 2011.01.16
  • Accepted : 2011.02.07
  • Published : 2011.03.01

Abstract

In this study, non-stoichiometric 1-x$[(K_{0.5}Na_{0.5})_{0.97}(Nb_{0.96}Sb_{0.04})O_3]$ + x $CeMnO_3$ + 0.8 mol%CuO + 0.2 wt% $Ag_2O$ (x=0, 0.005) ceramics were prepared by a conventional mixed oxide and carbonate method, their dielectric and piezoelectric properties were investigated with the variations of sintering temperature. As $CeMnO_3$ substitution incereased, the density, piezoelectric constant($d_{33}$) and dielectric constant($\varepsilon_r$) were increased and the mechanical quality factor(Qm) was decreased. At the sintering temperature of $1100^{\circ}C$, the density, electromechanical coupling factor($k_p$), dielectric constant($\varepsilon_r$) and piezoelectric constant($d_{33}$) of 0.5mol% $CeMnO_3$ specimen showed the optimun values of 4.475 $g/cm^2$, 0.437, 552 and 166 pC/N, respectively. However, the mechanical quality factor($Q_m$) showed the minimum value of 380.

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Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)

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