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Journal of the Korean Ceramic Society 1999;36(2): 107. |
| 용융탄산염 연료전지용 화이버 강화 $gamma$-LiAlO$_2$ 매트릭스의 적층에 의한 강도 증진 |
| 현상훈, 조성철, 홍성안1 |
연세대학교 세라믹공학과
1KIST 전지·연료전지 센타 |
| Strengthening of Fiber-Reinforced $gamma$-LiAlO$_2$ Matrixes for Molten Carbonate Fuel Cell by Laminatin |
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| ABSTRACT |
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Microstructural variation and strengthening effects with lamination methods of alumina fiber-reinforced ${gamma}$-LiAlO2 matrixes for Molten Carbonate Fuel Cell(MCFC) were studied. The porosities of all matrix laminated by hot-pressing of two green sheets under 1 kg/$textrm{cm}^2$ at 45$^{circ}C$ for 1 min and by double-casting which the second layer cast on the first green sheet dried for 3.5h were more than 50%. The strength of the Al2O3 fiber-reinforced matrix prepared by lamination was enhanced by 70% in comparison with the non-laminated matrix (115 gf/$textrm{mm}^2$) and the strength-directionality due to fiber-orientation also could be removed. The strength of matrixes laminated by triple-casting was higher than that of the double-cast matrix, but triple-cast matrix showed the directionality with the casting direction, and furthermore its porosity was less than 50%. Although the strength of matrixes laminated by double-casting (195 gf/$textrm{mm}^2$) is slightly less than that of matrixes laminated by hot-pressing (212 gf/$textrm{mm}^2$), the double-casting method was evaluated to be more efficient laminating process in MCFC matrix processing. |
| Key words:
MCFC, Fiber-reinforced $\gamma$-LiAlO$_2$ matrixes, Fiber-orientation, Lamination, Hot pressing, Double casting |
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