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.
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