Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference (한국전기전자재료학회:학술대회논문집)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Ferroelectric properties of $Y_2O_3$ and $MnO_2$ doped $SrBi_2Nb_2O_9$ ceramics

$Y_2O_3$와 $MnO_2$를 첨가한 $SrBi_2Nb_2O_9$ 세라믹스의 강유전 특성

  • Suk, Jong-Min (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Yong-Hyun (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Noh, Jong-Ho (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Cho, Jeong-Ho (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Chun, Myoung-Pyo (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Byung-Ik (Advanced Materials and Components Lab, Korea Institute of Ceramic Engineering and Technology) ;
  • Ko, Tae-Gyung (Smart Functional Materials Lab, Inha University)
  • Published : 2006.06.22
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Abstract

기계적 품질계수(Qm)를 향상시키기 위해 $Y_2O_3$와 $MnO_2$를 첨가함에 따른 $SrBi_2Nb_2O_9$ 세라믹스의 강유전 특성을 알아보았다. 합성분말의 입도를 분석 한 결과 $SrBi_2Nb_2O_9$의 경우 781.27nm였고, $Y_2O_3$와 $MnO_2$를 첨가한 경우 각 각 830.4nm와 981.1nm로 particle size는 증가하였고, 소결 후 소결밀도는 차이가 거의 없었으며, grain size는 $SrBi_2Nb_2O_9$과 $Y_2O_3$를 첨가했을 경우 $1{\mu}m$이하이며 반면, $MnO_2$를 첨가하였을 때 결정립이 성장하여 $3{\sim}4{\mu}m$로 나타났다. 또한, 모두가 $450^{\circ}C$ 이상의 상전이온도를 갖았다.

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