J. Korean Ceram. Soc. > Volume 30(11); 1993 > Article
 Journal of the Korean Ceramic Society 1993;30(11): 933.
 $SO_4^{2-}/Al_2O_3$의 표면전하밀도와 산적특성 함영민, 홍영호, 장윤호1 단국대학교 공과대학 화학공학과1인하대학교 공과대학 화학공학과 Surface Charge Density and Acidic Characteristics of $SO_4^{2-}/Al_2O_3$ ABSTRACT SO42-/Al2O3 powder was prepared by the coprecipitation method from the Al(NO3)3.9H2O and NH4OH and followed by being treated with various concentrations of sulfuric acid. The characterization of these powders was performed with XRD, BET and FT-IR. The surface charge density at alumina/KCl(aq) interface was measured by potentiometric titration method. From the experimental data it was shown that acid strength, specfic surface area, and structure of surface treated alumina were independent on the amount of exchanged SO42-. However, the acid amounts of alumina were increased with the amounts of SO42- formed on alumina surface. The relation between the acid amount of SO42- ion exchanged alumina surface and the surface charge density for SO42-/Al2O3/KCl(aq) interface was investigated.
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