Influence of Reaction Factors on Formation of Alumina Sol from Kaolin

카올린으로부터 알루미나 졸의 형성에 미치는 반응인자의 영향

  • Kang, Hyo-Kyoung (Dept. of Inorganic Materials Engineering, Pusan National University) ;
  • Park, Hong-Chae (Dept. of Inorganic Materials Engineering, Pusan National University) ;
  • Park, Hee-Chan (Dept. of Inorganic Materials Engineering, Pusan National University)
  • 강효경 (부산대학교 무기재료공학과) ;
  • 박홍채 (부산대학교 무기재료공학과) ;
  • 박희찬 (부산대학교 무기재료공학과)
  • Received : 1997.06.14
  • Accepted : 1997.07.26
  • Published : 1997.08.10


The preparation of alumina sol for fine chemical field from kaolin-derived aluminum sulfate solution is performed. Noncrystalline AlO(OH) was prepared by dropping ammonia water into aluminum sufate solution with stirring. Acetetic acid was added to form the electrical double layers on the particle surface of the slurry, which resulted in a stable sol. The influence of the reaction temperature, reaction time, acetetic acid concentration on the preparation of alumina sol were investigated. Dispersed colloid particles of AlO(OH) were prepared at the reaction temperature of $50{\sim}90^{\circ}C$ and 1.6 A/C = 1.6 (molar ratio), regardless of the reaction time. Stable alumina sol having a particle size of about 5~10 nm was prepared in the range 1~5 vol% alumina content.



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