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J. Korean Ceram. Soc. > Volume 50(6); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(6): 384.
doi: https://doi.org/10.4191/kcers.2013.50.6.384
수산화알루미늄으로부터 수열법을 이용한 활성 알루미나 제조에 관한 연구
배현철, 이상진
목포대학교 신소재공학과
Fabrication of Activated Alumina Using Aluminum Hydroxide by a Hydrothermal Process
Hyeon Cheol Bae, Sang-Jin Lee
Department of Advanced Materials Science and Engineering, Mokpo National University
Activated alumina was fabricated with aluminum hydroxide in this study. High-purity alumina gel and boehmite were prepared from aluminum hydroxide by a hydrothermal process and fired to activate alumina having a surface area of 380 ~ 480 $m^2/g$ with less loss of ignition. The aging and drying condition during the fabrication process affected the loss of ignition, the sedimentation time of the alumina suspension, as well as the surface area of the activated alumina. For pellet-type activated alumina, the pre-fired alumina gel and boehmite were press-formed and fired at $400^{circ}C$ and $550^{circ}C$ for 6 h, respectively. The fired pellets showed a low density of 2.0 ~ 2.2 $g/cm^3$ with 20% firing shrinkage and sufficient handling strength. In this study, a new fabrication process for high-quality activated alumina with aluminum hydroxide is introduced. The effects of the processing parameters on the activated alumina properties are also examined.
Key words: Activated alumina, Aluminum hydroxide, Alumina gel, Boehmite, Hydrothermal process
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