화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.18, No.9, 470-474, September, 2008
DOI10.3740/MRSK.2008.18.9.470  Export Citation
Gadolinium-doped Ceria/Magnesia (CGO/MgO) 복합체 전해질의 전기적 특성 분석
Electrical Properties of Gadolinium-doped Ceria/Magnesia (CGO/MgO) Composite Electrolytes
조승환, P. Muralidharan, 김도경†
  • 한국과학기술원 신소재공학과
Seung-Hwan Jo, P. Muralidharan, and Do-Kyung Kim†
  • Department of Materials Science and Engineering, Korea Advanced Institute Science and Technology (KAIST), Daejeon 305-701, Korea
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Composites of gadolinium-doped ceria/magnesia(CGO/MgO) were synthesized and characterized for the electrolytes of intermediate temperature solid oxide fuel cells. XRD and SEM results revealed that composite electrolytes consisted of their own phases after sintering at 1400oC without noticeable solid solution of Mg into CGO. As the MgO content increased, the total electrical conductivity decreased, which might be attributed to the decrease of grain boundary conductivity, possibly due to the lowering of the continuity of the CGO grains and blocking effects of the insulating MgO phase. The space charge effect may not be a significant factor to affect the electrical conductivity of the CGO/MgO composites.
Keywords:Ceria;MgO;electrolyte;composite;conductivity;SOFC
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