Polysilazanes and related compositions, processes and uses

Details Polysilazanes and related compositions, processes and uses Polysilazanes and related compositions, processes and uses

1990-04-03

1991-10-08

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 95, 501 96, 528 10, 528 28, 264 65, 423353, C04B 3558

Patent

active

050554310

ABSTRACT:
Silazanes and related compounds are prepared by providing a precursor containing one or more cyclic silazane units, causing polymerization to occur in the presence of a transition metal catalyst to form a polysilazane product. Further products may result from additional reaction. The novel compounds may be pyrolyzed to yield ceramic materials such as silicon nitride, silicon carbide and mixtures thereof. In a preferred embodiment, substantially pure silicon nitride and articles prepared therefrom are provided. Fibers, coatings, binders and the like may be prepared from the novel materials.

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