PROCESS FOR THE WET CROSSLINKING OF POLYSILAZANES, IN PARTICULAR FOR OBTAINING CERAMIC FIBERS

摘要

The present invention relates to a process for crosslinking polysilazanes, characterized in that it comprises bringing the polysilazanes into contact with an effective amount of a gaseous mixture which cross-links ammonia with water vapor, said polysilazanes having, per molecule at minus a unit of formula CongSi-NH-SiCong. / P P Use of the polysilazanes thus crosslinked to the preparation, in particular of ceramic fibers by pyrolysis. / P