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Citation: LI You-Ji, CAO Feng, YU Yu-Xi, LI Xiao-Dong. Preparation and Characterization of Near-stoichiometric SiC[J]. Chinese Journal of Applied Chemistry, ;2004, 21(7): 731-733. shu

Preparation and Characterization of Near-stoichiometric SiC

LI You-Ji ^a,, ,
CAO Feng ^b ,
YU Yu-Xi ^b ,
LI Xiao-Dong ^b

1.
a Department of Chemistry, Jishou University, Jishou 416000;
2.
b Key Laboratory of Ceramic Fibers and Its Composites, National University of Defence Technology, Changsha

Corresponding author: LI You-Ji,
Received Date: 18 August 2003
Available Online: 8 March 2004
Fund Project: 国家自然科学基金(59972042)资助项目 (59972042)

The preparation method of precursor for SiC was improved.Polyborazine-polymethylsilane (PBN-PMS) was obtained by reaction of PMS with 1%(mass fraction) PBN;and then soluble polymeric precursor PBN-PCS-PMS was prepared by hybridization of the PBN-PMS with a suitable amount of PCS (polycarbosilane).Silicon carbide material was obtained by pyrolysis of the PBN-PCS-PMS in inert atmosphere at 1 400℃.XRD,elemental analysis,²⁹Si and ¹³CMAS NMR indicated it is a near-stoichiometric β-SiC when the mass ratio of PCS to PBN-PMS is 0.25:1.00.
- silicon carbide,
- polycarbosilane,
- polymethylsilane,
- polyborazine
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