Polysiloxazanes, silicon oxynitride fibers and processes for pro

Details Polysiloxazanes, silicon oxynitride fibers and processes for pro Polysiloxazanes, silicon oxynitride fibers and processes for pro

1991-09-06

1992-11-24

Dixon, Jr., William R.

Compositions: ceramic

Ceramic compositions

Refractory

501 97, C04B 3500, C04B 3558

Patent

active

051661047

ABSTRACT:
Novel polysiloxazanes comprising [SiH.sub.2).sub.n NH-- and [SiH.sub.2).sub.m O-- as the main repeating units are provided. The polysiloxazanes are produced by reacting a dihalosilane or an adduct thereof with a Lewis base, with ammonia and water vapor or oxygen. From the polysiloxazane, novel silicon oxynitride shapes can be produced and the silicon oxynitride shapes are essentially composed of silicon, nitride (5 mol % or more) and oxygen (5 mol % or more).

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Okamura et al., The Synthesis of Silicon Oxynitide Fibers By Nitridation of Polycarbosilane, Chemistry Letter, pp. 2059-2060, The Chem. Soc. of Japan.

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