Study on Drying Process of 3Al<,2>O<,3>2?SiO<,2>, Mullite Gel

摘要：

Monophasic mullite gel with composition 3Al<,2>O<,3>2SiO<,2> was prepared by the sol-gel method using aluminium nitrate nonahydrate, aluminium-tri-isopropoxide and tetraethylorthosilicate as reagents. Gels with different drying control chemical additives (DCCAs) and polyvinylpyrrolidone (PVP) as spinning assistant were dried at several temperatures. The influences of temperatures, DCCAs and PVP in the drying process were investigated. The optimum drying temperature was 70℃. N, N- Dimethylformamide (DMF) was chosen as the preferable DCCA in the drying process. PVP decreased solvent volatilization speed and prevented gel crack at a certain extent.

关键词： Sol-gel process DCCAs PVP crack-flee

作者: SONG Huifeng KANG Zhuang CHEN Xintuo GU Lixia

作者单位: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, P. R. China

会议类型: 国际会议

会议名称: 2007年先进纤维与聚合物国际会议

会议地点: 上海

会议语种:英文

页码: 388-390

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）