| Sc2O3와 CeO2가 첨가된 ZrO2의 전기전도도 |
| 이동석, 허장원, 김재동, 김주선, 이해원, 김긍호, 김대준, 이종호 |
| 한국과학기술연구원 재료연구부 |
| Electrical Conductivity of ZrO2 Doped with Sc2O3 and CeO2 |
| Dong-Suek Lee, Jang-Weon Heo, Jae-Dong Kim, Joo-Sun Kim, Hae-Weon Lee, Gyeung-Ho Kim, Dae-Jun Kim, Jong-Ho Lee |
| Materials Science and Technology Division, KIST |
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| ABSTRACT |
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The electrical conductivity and phase stability of $ZrO_2$ doped with $Sc_2O_3$ and $CeO_2$ were investigated in order to search for better solid electrolyte material for solid oxide fuel cell. Present study showed that $ZrO_2$ doped with $Sc_2O_3$ and $CeO_2$ exhibited no phase transition during the heat treatment up to $1350^{Circ}C∼1550^{Circ}C$ and was stable as a cubic phase in whole temperature ranges. The $ZrO_2$ doped with $Sc_2O_3$ and $CeO_2$ showed much higher electrical conductivity than YSZ in the temperature range of $300∼^{Circ}C$ and better long term stability than other sc-$ZrO_2$ based electrolyte that showed the possibility as a strong candidate electrolyte material for intermediate-or low-temperature SOFC. 섂 돀棋 |
| Key words:
SOFC, Solid electrolyte, Sc$_2O_3-CeO_2$ Doped ZrO$_2$, Electrical conductivity, Long term stability |
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