Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of Excess PbO and $In_2$$O_3$on the Phase Formation and Dielectric Properies of Pb(${In_{1/2}}{Nb{1/2}}$)$O_3$

과량의 PbO 및 $In_2$$O_3$첨가가 PIN의 상합성 및 유전특성에 미치는 영향

  • Lee, Kwang-Ho (School of Materials Science and Engineering, Seoul National University) ;
  • Lee, Sang-Bop (School of Materials Science and Engineering, Seoul National University) ;
  • Kim, Hwan (School of Materials Science and Engineering, Seoul National University)
  • 이광호 (서울대학교 재료공학부) ;
  • 이상법 (서울대학교 재료공학부) ;
  • 김환 (서울대학교 재료공학부)
  • Published : 2001.04.01
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Abstract

Pb(In$_{1}$2/Nb$_{1}$2/)O$_3$의 제조시 전구체로서 tetragonal pyrochlore(Pb$_3$Nb$_2$O$_{8}$)를 사용하였을 때, 페로브스카이트상의 상합성을 촉진시키고 유전특성을 향상시키기 위해 A(B$_1$,B$_2$) 구조에서 A자리에 해당하는 PbO와 B$_1$자리에 해당하는 In$_2$O$_3$를 각각 과량으로 첨가하여 900-110$0^{\circ}C$의 소결온도범위에서 상합성, 소결특성, 유전특성에 미치는 영향에 대해 고찰하였다. 과량으로 첨가된 PbO는 상합성 및 소결특성을 향상시킬 수 있어서 유전특성을 향상시킬 수 있었으나 과량으로 첨가된 In$_2$O$_3$에서는 그러한 결과를 얻을 수 없었다. 이러한 원인은 Pb$_3$Nb$_2$O$_{8}$을 전구체로 사용할 경우, PbO 공융액상이 페로브스카이트상 형성 직전까지 남아 있어서 활발한 PbO 휘발이 일어나는데, 과량으로 첨가된 PbO가 이를 효과적으로 보상하기 때문인 것으로 판단된다.

Keywords

References

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