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运用IR、XRD和TG研究了掺纳米铁粉的聚碳硅烷的热裂解过程发现它可分为有机硅聚合物转化为无机无定形态和无定形态生长为微晶态二个阶段较慢的升温速率有利于提高陶瓷产率,铁在热解产物中的主要形态是Fe3Si．纳米铁粉促进了β-SiC微晶的生长
The thermal decomposition of polycarbosilane doped with nano-sized iron powder was investigated by IR, XRD and TG. It was found that the polycarbosilane could be divided into two phases: the transition from organic silicon to inorganic amorphous and the amorphous to microcrystalline Heating rate is conducive to raising the ceramic yield, the main form of iron in the pyrolysis product is Fe3Si. Nano-iron powder promotes the growth of β-SiC crystallites