Relation between Potential and Dispersity in the Preparation Processof Nano-scale ZnO
纳米ZnO制备工艺中ζ电位与分散性的关系

Nano-scale powders (about 10nm) of ZnO were prepared by chemical method. Also therelation between potential and dispersity of zinc carbonate hydroxide precursor in the procedurewas studied. After being washed, the potential of particles was specially examined. It was foundthat the potential of particles decreased obviously and closed to its isoelectric point after beingwashed by distilled water. This phenomenon certainly caused the aggregation of particles. So inwashing process, the 0.1M ammonia was used instead of distilled water to controll pH value andincrease potential. Finally the dispersity of powders was improved.