微乳液法制备球形氧化锆粉体及其分散特性的研究  

Study on Preparation of Zirconia Spherical Powder by Nano-reactor of Microe mulsion and its Dispersibility

作　　者：马天[1] 杨金龙[1] 张立明[1] 何锦涛[1] 黄勇[1] 

机构地区：[1]清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《无机化学学报》2004年第2期121-127,共7页Chinese Journal of Inorganic Chemistry

基　　金：973计划资助项目(No.G2000067204-01);863计划资助项目(No.2001AA337060);国家自然科学基金重点资助项目(No.50232010)。

摘　　要：以水／环己烷／曲拉通-100／正己醇四元油包水微乳体系中的微乳液滴为纳米微反应器，通过微反应器中增溶的锆盐和沉淀剂发生反应，可以制备出基本无团聚、球形度较好的纳米级氧化锆粉体，粉体粒径为30～40nm且呈单峰分布。通过分析粉体中可溶性离子的含量及其在水中的电动行为以及悬浮体的流变特性，说明粉体具有良好的分散特性。The water droplets in th e microemulsion system of cyclohexane/water/Triton X-100/hexyl alcohol can be s een as the nano reactors which solubilize zirconium oxychloride and ammonia sepa rately.The precipitation reac-tions will take place in the confined spaces whic h were determined by the droplets size.The minute original re-actors help us ob tain ultrafine spherical zirconia powder with uniform diameter distribution and weak aggregate.The content of soluble ions,especially high valence opposite ions in the powders is lower than that in others.On comprehensively analyzing zeta p otential in the water and rheological characteristics,we can draw the conclusion that the powder has perfect dispersibility.

关 键 词：微乳液法 制备 球形粉体 氧化锆 分散特性 超细粉体 

分 类 号：O614.412[理学—无机化学] TB383[理学—化学]