Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Electrical Characteristics of BaCe$_{0.9}$R$_{0.1}$O$_3$-$\delta$(R=La, Yb, Al) Based Perovskite Phase

BaCe$_{0.9}$R$_{0.1}$O$_3$-$\delta$(R=La, Yb, Al)계 페롭스카이트 상의 전기적 특성

  • 최순목 (연세대학교 세라믹공학과) ;
  • 김신 (요업기술원 정밀요업과) ;
  • 이홍림 (연세대학교 세락믹공학과)
  • Published : 1999.01.01
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Abstract

Electrical characteristics of perovskite phases in the BaCe0.9R0.1O3-$\delta$(R=La, Yb and Al) system have been studied. Electrical conductivities of all specimens in air were higher than those in N2 atmosphers between 600 and 100$0^{\circ}C$. When temperature was elevated, the electrical conductivity difference between both atmospheres increased. Electrical conductivity of Yb3+ doped BaCeO3 specimen was higher than those of the La3+ and Al3+ doped specimens. The BaCe0.0Al0.1O3-$\delta$ showed higher proton transference number than both BaCe0.9Yb0.1O3-$\delta$ and BaCe0.9La0.1O3-$\delta$.

BaCeO3 페롭스카이트 구조의 Ce4+ 자리에 3가의 양이온 (La3+, Yb3+, Al3+)을 10 mol% 첨가하여 열처리한 후 전기적 특성을 관찰하였다. 전기전도도 측정 결과 모든 조성에서 질소분위기에서 측정한 경우보다 대기 중에서 측정한 경우의 전기전도도가 높게 측정되었으며 이러한 경향은 온도가 높아질수록 두드러졌다. 전기전도도는 BaCe0.9Yb0.1O3-$\delta$조성에서 가장 높았고 BaCe0.9Al0.9O3-$\delta$ 조성에서 가장 낮았다. proton의 수송율(transference number)을 기전력 측정법을 통해 비교한 결과 Al을 첨가한 조성에서 모든 온도에 걸쳐 가장 높은 proton의 수송율을 얻을 수 있었다.

Keywords

References

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