Initial Precipitation Behavior of Aluminum Hydroxide Particles From Aluminum Salt Solution in the Presence of Sulfate Ion

Abstract

On the synthesis of aluminum hydroxide from aluminum salt solution by homogeneous precipitation method using urea, the initial prcipitation behavior of aluminum hydroxide in the presence of sulfate ion was investigated. It was observed that the growth of aluminum hydroxide particles occurred discretely up to ca.80 nm in diameter, but above this size the growth occurred by accompanying the particle coalescence in the course of the precipitation of aluminum hydroxide. This agrees with the previous observation.