硅溶胶-凝胶化反应在陶瓷胶态成型中的应用  

Application of Silica Sol-Gel in Colloidal Forming of Ceramics

作　　者：罗杰盛[1] 谢志鹏[1] 马景陶[1] 黄勇[1] 程一兵 

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 [2]School of Physics and Materials Engineering,Monash University,Clayton,Victoria 3800 Australia

出　　处：《无机材料学报》2003年第6期1205-1209,共5页Journal of Inorganic Materials

基　　金：973重大基础研究项目(G2000067204-01);国家自然科学基金两地基金(Grant 50140120423)

摘　　要：研究了一种新的凝胶成型工艺,将硅溶胶-凝胶特性成功运用于陶瓷部件胶态成型.该成型过程是正硅酸乙酯(TEOS)在强碱性条件下水解得到硅溶胶,硅溶胶通过凝胶化反应生成Si-O-Si网络空间结构的凝胶,进而固定悬浮体中陶瓷颗粒形成陶瓷坯体.运用该方法成型得到的坯体具有较高的强度,均匀的显微结构.此外,该方法具有毒性低,固化速度快等优点.A novel colloidal forming processing of ceramics was investigated. The characteristic of silica sol-gel was applied successfully to colloidal forming of ceramics. The process is based on the casting of the slurry, containing powder and silica sol prepared by hydrolysis of tetraethoxysilane (TEOS) at pH 12.8. Then the mixture forms gelled parts through silica sol-gel. Ceramic green parts with strength of 5MPa can be obtained by this method. The forming process has advantages of low toxicity and high consolidation rate.

关 键 词：陶瓷 胶态成型 硅溶胶 正硅酸乙酯 

分 类 号：TQ174[化学工程—陶瓷工业]