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J. Korean Ceram. Soc. > Volume 49(2); 2012 > Article
Journal of the Korean Ceramic Society 2012;49(2): 197.
doi: https://doi.org/10.4191/kcers.2012.49.2.197
CaCrO4 첨가에 따른 LCCC(La0.8Ca0.2Cr0.9Co0.1O3-δ)의 전이액상소결거동
이호창, 강보경, 이준형, 허영우, 김재육1, 김정주
경북대학교 신소재공학부
Transient Liquid Phase Sintering of LCCC(La0.8Ca0.2Cr0.9Co0.1O3-δ) with the Addition of CaCrO4
Ho-Chang Lee, Bo-Kyung Kang, Joon-Hyung Lee, Young-Woo Heo, Jae-Yuk Kim1, Jeong-Joo Kim
School of Materials Science and Engineering, Kyungpook National University
1Ssangyong Materials Corp.
In this study, in order to improve densification of $La_{0.8}Ca_{0.2}Cr_{0.9}Co_{0.1}O_{3-delta}$ (LCCC), which is known for one of the most proper candidate interconnector materials in the solid oxide fuel cells, $CaCrO_4$ was prepared via solid oxide synthesis route and added to the LCCC with different amount and particle sizes. As the amount of the $CaCrO_4$ increased, porosity of the sintered samples increased, and the pore size was proportional to the particle size of the $CaCrO_4$. This supports the fact that the $CaCrO_4$ phase forms liquid during sintering and permeate into the matrix leaving behind large pores. Then the liquid reacts with the matrix through the solid solution. However, when the samples were sintered with a slow ramp up rates, the porosity decreased. This is thought to be caused by the progressive solid solution of $CaCrO_4$ before the temperature reach to the melting temperature and forms a fluent amount of liquids. The sintering behavior of the LCCC with the addition of $CaCrO_4$ was analyzed through the transient liquid phase sintering on the basis of the microstructure observation and phase identification by x-ray diffraction.
Key words: Transient liquid phase sintering, LCCC, Solid oxide fuel cell(SOFC)
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