纳米ZnO制备工艺中ζ电位与分散性的关系  

Relation between Potential and Dispersity in the Preparation Processof Nano-scale ZnO

作　　者：李强[1] 高濂[1] 奕伟玲 严东生[1] 

机构地区：[1]中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室,上海200050

出　　处：《无机材料学报》1999年第5期813-817,共5页Journal of Inorganic Materials

基　　金：上海市科委新材料研究中心!98JC14021

摘　　要：本工作采用化学工艺制备１０ｎｍ左右的ＺｎＯ粉体，并对工艺过程中碱式碳酸锌前驱体分散性和表面电位之间的关系进行了研究．专门对洗涤后粉体表面电位进行了分析．发现采用蒸馏水洗涤后粉体的（电位明显降低，接近其等电点，并导致粉体团聚．因此，在洗涤过程中，使用０．１Ｍ氨水取代蒸馏水来控制ｐＨ值，提高电位，改善粉体的分散性．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.

关 键 词：纳米 材料 电位 氧化锌 粉体 分散性 

分 类 号：TQ132.41[化学工程—无机化工] TF123.23[冶金工程—粉末冶金]