Mullite long fibres prepared by sol-gel method using water solvent systems

摘要

Mullite long fibres, which are a candidate for high temperature applications were prepared by sol-gel method from water solvent systems. They were synthesized from three different combinations of raw materials as follows; (1):Al(O~iC_3H_7)_3, Al-nitrate and Si(OC_2H_5)_4 (TEOS), (2):Al metal, Al-chloride and TEOS, (3):Al metal, Al-nitrate and TEOS. In the methods (1) and (2), vey fine SiO_2 aerosil particles were also used partially replacing TEOS. The Prepared solution were condensed and examined the spinnability by a hand drawing method. Dense and crack free Mullite fibres were prepared from the methods (1) and (3) by firing up to 1100 deg.C.