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 Characteristics of (Na,K)NbO3 Ceramics System According to Sintering Time

소결시간변화에 따른 (Na,K)NbO3계 세라믹스의 유전 및 압전특성

  • 김도형 (세명대학교 전기공학과) ;
  • 류주현 (세명대학교 전기공학과) ;
  • 김인성 (한국전기연구원 압전소자그룹) ;
  • 송재성 (한국전기연구원 압전소자그룹)
  • Published : 2008.10.01
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Abstract

In this study, $0.95(K_{0.5}Na_{0.5})NbO_{3}-0.05Li(Sb_{0.8}Nb_{0.2})O_{3}+0.2\;wt%Ag_{2}O$ were investigated as a variations of sintering times in order to improve dielectric and piezoelectric properties of lead-free piezoelectric ceramics. $Ag_{2}O$ were used as sintering aids and the specimens were sintered during 3, 5, 7, 9 and 11 hours, respectively. At the specimen sintered during 7 hour, Electromechanical coupling factor ($k_p$), density, dielectric constant (${\epsilon}_{\gamma}$), piezoelectric constant ($d_{33}$) and curie temperature ($T_c$) of composition ceramics showed the optimal value of 0.450, 4.274 $[g/cm^3]$, 1007, 257 [pC/N] and $396^{\circ}C$, respectively.

Keywords

References

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