Complex Impedance Characteristics and Electrical Conductivity of ${Nd_{1-x}}{Sr_x}{Ga_{1-x}}{Mg_x}{O_{3-\delta}$ Electrolytes

${Nd_{1-x}}{Sr_x}{Ga_{1-x}}{Mg_x}{O_{3-\delta}$ 고체전해질의 복소임피던스 특성과 전기전도도

  • ;
  • Allan J. Jacobson
  • 유광수 (서울시립대학교 재료공학과) ;
  • Published : 2001.04.01

Abstract

고상반응법으로 이론 밀도의 약 97%의 소결 밀도를 갖는 N $d_{1-x}$S $r_{x}$G $a_{1-x}$M $g_{x}$ $O_{3{\delta}}$(x=0, 0.03, 0.07, 0.1) 고체전해질을 제조하였다. X선 회절 분석 결과, x=0.03일 때의 X선 회절도는 순수한 NdGa $O_3$와 같았으나, x=0.07, 0.1일 때에는 불순물이 나타났다. 교류 복소임피던스는 4$50^{\circ}C$~90$0^{\circ}C$의 온도 범위에서 공기 중에서 측정하였으며, 각 조성에 대하여 상호 비교 분석하기 위하여 복소비저항 스펙트럼으로 변환하여 해석하였다. 전기전도도는 N $d_{0.93}$S $r_{0.07}$G $a_{0.93}$M $g_{0.07}$ $O_{0.97}$(x=0.07) 시편이 90$0^{\circ}C$에서 6$\times$$10^{-3}$ S$cm^{-1}$ /로 가장 우수하였으며, 활성화 에너지는 저온 영역에서는 1 eV, 고온 영역에서는 0.74 eV이었다.다.

Keywords

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