有机分散介质中纳米SiC粉体稳定悬浊液的制备  

Preparation of High Stability Suspension of SiC Nano-particles in Organic Solvent

作　　者：宋春军[1] 徐光亮[1] 熊昆[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010

出　　处：《中国粉体技术》2007年第5期21-23,共3页China Powder Science and Technology

基　　金：国防基础科研项目;编号:A3120061156

摘　　要：纳米粉体的稳定分散是制备微观结构均匀、缺陷少的纳米复相陶瓷坯体的关键。本文中采用Zeta电位、粒度分析、SEM等测试技术分析了超声震荡和HF酸洗对SiC纳米粉体的影响;对比研究了乙醇、乙二醇以及75%乙醇和25%乙二醇混合液作为分散介质,聚乙二醇为分散剂时纳米SiC粉体在不同pH下的分散稳定性,确定了粉体最佳超声震荡的最佳时间;探讨了酸洗的作用;并在乙二醇中,以1%PEG为分散剂,pH=10条件下获得了纳米碳化硅粉体的高稳定分散悬浮液。The preparation of well dispersed stable suspension of nano-particles is the key process of forming of a green body with homo- geneous microstructure and low defects. The effects of ultrasonication and HF washing on SiC nano-particles were analyzed by Zeta potential, particle size distribution and SEM. The stability of suspension of SiC in ethanol, ethanediol and mixture of the two medias with PEG as dispersant at different pH were compared. The optimum ultrasonication time for SiC nano-particles was obtained. The influence of HF washing on SiC nano-particles was discussed; and high stability of SiC nano-particles suspension was achieved at pH=10 in ethanediol with 1wt% PEG as dispersant.

关 键 词：纳米SIC 分散 分散介质 

分 类 号：TB383[一般工业技术—材料科学与工程]