Aluminum Iso-Propoxide에 의한 구형 알루미나 분체의 제조

Preparation of Spherical Alumina Particle from Aluminum Iso-Propoxide

Spherical alumina powders were prepared by the controlled hydrolysis of aluminum iso-propoxide in a solution consisting of n-octyl alcohol and acetonitrile. As aluminum alkoxide s concentration increased, the particle size was increased and size distribution was more broad. As-prepared particle morphology was not spherical when acetonitrile volume fraction was increased over than 60%. As-prepared amorphous powders crystallized to ${\gamma}$ 수식 이미지-alumina at $1000^{\circ}C$ 수식 이미지 and converted to ${\alpha}$ 수식 이미지-alumina at $1150^{\circ}C$ 수식 이미지. The particle morphology was retain after crystallization ${\alpha}$ 수식 이미지-alumina. When aluminum iso-propoxide was used as aluminum source, the optimum preparation condition of spherical alumina was 0.1M AIP, 0.2M H2O, $0.1g/{\ell}$ 수식 이미지 HPC with a volume fraction (1/1) of the n-octyl alcohol/acetonitrile, 10min of reaction time and 30min of aging time.