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RISS 인기검색어
- 검색키워드
- 저자 : Katsuhito Takei (검색결과 2 건)
- 무료
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- 유료
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Investigation of Li Dopant as a Sintering Aid for ScSZ Electrolyte for IT-SOFC
Masashi Mori,Yu Liu,Shuhua Ma,Shin-ichi Hashimoto,Katsuhito Takei 한국세라믹학회 2008 한국세라믹학회지 Vol.45 No.12
In this study, the effects of small amounts (≤3 mol%) of Li doping on the sintering characteristics and electrochemical performance of (ZrO2)0.89(ScO1.5)0.1(CeO2)0.01 (ScSZ) were investigated. By adding 3 mol% lithium, the densification temperature of ScSZ was reduced from the conventional temperature of 1400oC to 1200oC. It was found that Li doping also led to changes in the Zr:Sc ratio at the grain boundaries. Correspondingly, the dispersion of lithium zirconia at the grain boundaries accelerated the growth of ScSZ grains and increased the grain boundary resistance at temperatures below 450oC. At elevated temperatures of 450~750oC, the electrical conductivity of the ScSZ after doping remained almost unchanged under air and reducing atmospheres. These results suggest that the addition of lithium is promising for use in low temperature co-firing of ScSZ-based components for intermediate temperature solid oxide fuel cells. In this study, the effects of small amounts (≤3 mol%) of Li doping on the sintering characteristics and electrochemical performance of (ZrO2)0.89(ScO1.5)0.1(CeO2)0.01 (ScSZ) were investigated. By adding 3 mol% lithium, the densification temperature of ScSZ was reduced from the conventional temperature of 1400oC to 1200oC. It was found that Li doping also led to changes in the Zr:Sc ratio at the grain boundaries. Correspondingly, the dispersion of lithium zirconia at the grain boundaries accelerated the growth of ScSZ grains and increased the grain boundary resistance at temperatures below 450oC. At elevated temperatures of 450~750oC, the electrical conductivity of the ScSZ after doping remained almost unchanged under air and reducing atmospheres. These results suggest that the addition of lithium is promising for use in low temperature co-firing of ScSZ-based components for intermediate temperature solid oxide fuel cells.
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Investigation of Li Dopant as a Sintering Aid for ScSZ Electrolyte for IT-SOFC
Mori, Masashi,Liu, Yu,Ma, Shuhua,Hashimoto, Shin-ichi,Takei, Katsuhito The Korean Ceramic Society 2008 한국세라믹학회지 Vol.45 No.12
In this study, the effects of small amounts (${\leq}3\;mol%$) of Li doping on the sintering characteristics and electrochemical performance of $(ZrO_2)_{0.89}(ScO_{1.5})_{0.1}(CeO_2)_{0.01}$ (ScSZ) were investigated. By adding 3 mol% lithium, the densification temperature of ScSZ was reduced from the conventional temperature of $1400^{\circ}C$ to $1200^{\circ}C$. It was found that Li doping also led to changes in the Zr:Sc ratio at the grain boundaries. Correspondingly, the dispersion of lithium zirconia at the grain boundaries accelerated the growth of ScSZ grains and increased the grain boundary resistance at temperatures below $450^{\circ}C$. At elevated temperatures of $450{\sim}750^{\circ}C$, the electrical conductivity of the ScSZ after doping remained almost unchanged under air and reducing atmospheres. These results suggest that the addition of lithium is promising for use in low temperature co-firing of ScSZ-based components for intermediate temperature solid oxide fuel cells.
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