Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Juergen Clade

Dieter Sporn

Gerhard Roewer

Erich Seider

Erika Brendler

Thomas Lange

Dorit Mainhold

Arne Ruedinger

Heiko Spaniol

The invention relates to a method for producing a polysilane-polycarbosilane copolymer solution. Said method comprises the preparation of a polysilane, obtained by the disproportionation of a methylchlorodisilane or a mixture of methylchlorodisilanes of formula Si2MeC1with a Lewis base as the catalyst, a subsequent thermal cross-linking of the polysilane to form an infusible polysilane-polycarbosilane copolymer that is soluble in inert solvents, in addition to the production of said solution by the dissolution of the polysilane-polycarbosilane copolymer in an inert solvent. The invention also relates to a method for producing oxygen-depleted ceramic fibers and other molded bodies with a composition similar to that of SiC. Said method comprises the spinning of the solution to obtain green fibers according to the dry spinning method and the pyrolysis of the dried green fibers in an inert gas atmosphere or a reductive atmosphere.

Polysilane-polycarbosilane copolymer solutions and oxygen-depleted ceramic moulded bodies prepared therefrom with compositions similar to that of SiC

The present invention pertains to a process for producing unmeltable polysilane-polycarbosilane copolymers which are soluble in inert solvents, comprising the steps Green fibers and low-oxygen/oxygen-free ceramic fibers with a very low chlorine content can be produced using this process.

Polysilane-polycarbosilanes with reduced chlorine content based on methylchloropolysilanes, and spinning dopes and ceramic moldings produced therefrom

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Wuerzburg, Germany

Juergen Clade