SIO2- AND ZRO2-BASED CERAMIC FIBERS AND PROCESS FOR THE PREPARATION THEREOF

摘要

23 SiO2- AND ZrO2-BASED CERAMIC FIBERS AND PROCESS FOR THE PREPARATION THEREOF The present invention relates to ZrO2- and SiO2based ceramic fibers in which the weight ratio between SiO2 and ZrO2 is comprised between 99 and 0.7. The tetragonal ZrO2 phase is stable at temperatures comprised between 0 and 1500 .degree.C. The process comprises the preparation of: a solution of Zr(OR1)4, where R1 is an alkyl or aryl, Si(OR2)4, where R2 is alkyl or aryl, an organic solvent and an acid. Vapor-phase water is bubbled in said solution, then the obtained solution is drawn and the fibers thus obtained are heated to obtain the crystallization of ZrO2 and SiO2.