Near-Stoichiometric Silicon Carbide from an Economical Polysilane Precursor

Na condensation of CH3SiHCl2 gives polysilanes of the type ((CH3SiH)x (CH3Si)y)n (where x+y= 1) whose pyrolysis in a stream of Ar gives SiC and a substantial amount of elemental Si. Treatment of such polysilanes with catalytic quantities of group‐IV‐metal–organometallic complexes, ((η‐C5H5)2ZrH2)n,...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 1992-05, Vol.75 (5), p.1300-1302
Main Authors: Seyferth, Dietmar, Wood, Timothy G., Tracy, Henry J., Robison, Jennifer L.
Format: Article
Language:English
Subjects:
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
polysilanes
precursors
pyrolysis
silicon carbide
Structural ceramics
synthesis
Technical ceramics
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Summary:Na condensation of CH3SiHCl2 gives polysilanes of the type ((CH3SiH)x (CH3Si)y)n (where x+y= 1) whose pyrolysis in a stream of Ar gives SiC and a substantial amount of elemental Si. Treatment of such polysilanes with catalytic quantities of group‐IV‐metal–organometallic complexes, ((η‐C5H5)2ZrH2)n, (η‐C5H5)2Zr(CH3)2, (η‐C5H5)2ZrHCl, and (η‐C5H5)2‐Ti(CH3)2, results in cross‐linking processes such that pyrolysis of these polysilanes gives close to stoichiometric SiC (≥95 wt %) and only very little elemental Si.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1151-2916.1992.tb05578.x