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J. Korean Ceram. Soc. > Volume 44(6); 2007 > Article
Journal of the Korean Ceramic Society 2007;44(6): 325.
doi: https://doi.org/10.4191/kcers.2007.44.6.325
Al2(SO4)3와 Na2SO4 혼합용액의 가수분해에 의한 고기공 AlO(OH) 겔의 합성에서 pH가 기공특성에 미치는 영향
박병기, 최동욱, 이재락
한국화학연구원 에너지소재연구센터
Effect of pH on Pore Characteristics in Synthesis of High Porous AlO(OH) Gel by Hydrolysis of Al2(SO4)3 and Na2SO4 Mixed Solution
Byung-Ki Park, Dong-Uk Choe, Jae-Rock Lee
Energy Materials Research Center, Korea Research Institute of Chemical Technology
ABSTRACT
High porous AlO(OH) gel is used in precursor of ceramic material, coating material and porous catalyst. For use of these, not only physiochemical control for particle morphology, pore characteristic and peptization but also studies of synthetic method for preparation of high porous AlO(OH) gel were required. In this study, high porous AlO(OH) gel was prepared through the aging and filtration process of aluminum hydroxides gel precipitated by the hydrolysis reaction of $Na_2CO_3$ solution and $Al_2(SO_4)_3$ and $Na_2SO_4$ mixed solution. In this process, optimum synthetic condition of AlO(OH) gel having excellent pore volume as studying the effect of hydrolysis pH on gel precipitates has been studied. Hydrolysis pH brought about numerous changes on crystal morphology, surface area, pore volume and pore size. Physiochemical properties of gel were investigated as using XRD, TEM, TG/DTA, FT-IR and $N_2$ BET method.
Key words: $Al_2(SO_4)_3$, Mineralizer, Porous material, Catalyst, Alumina ceramic
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