Synthesis and thermally induced ceramization of a non-oxidic poly(methylsilsesquicarbodi-imide) gel

作者：Andreas O. Gabriel, Ralf Riedel, Sebastian Storck, Wilhelm F. Maier · 发表于：Applied Organometallic Chemistry · 年份：1997 · DOI：10.1002/(sici)1099-0739(199710/11)11:10/11<833::aid-aoc643>3.0.co;2-s · 被引用次数：59 · 研究领域：Advanced ceramic materials synthesis、Silicone and Siloxane Chemistry、Synthesis and characterization of novel inorganic/organometallic compounds

A novel polymeric organosilicon gel with the composition [MeSi(NCN)1.5]n synthesized by the reaction of MeSiCl3 with Me3Si–N=C=N–SiMe3 is reported. The reaction is performed without any solvent and with catalytic amounts of pyridine and provides highly cross-linked poly(methylsilsesquicarbodi-imide) in the form of a stable non-oxidic gel with unusual low open porosity (<1 m2 g−1). The Si–C–N gel transforms to an amorphous silicon carbonitride ceramic, SiC1.1N1.6, by the thermally induced ceramization at 1200 °C in inert atmosphere (argon). The gel-derived silicon carbonitride is thermally stable up to 1450 °C. The synthesis, characterization and pyrolysis behavior of the new polyorganosilicon gel is discussed. © 1997 John Wiley & Sons, Ltd.