Abstract A kind of particle with “tremella-like” surface and core-shell structure was synthesized by pyrolysizing polycarbosilane (PCS). The “tremella-like” surface was mainly composed of graphene, which perpendicularly grew on the nucleus. The nucleus was composed of polycrystalline SiC, in which β-SiC nano-crystal randomly dispersed in amorphous matrix. This kind of particle was believed to have a great potential in the electromagnetic wave absorbing material application, because it had a huge specific surface area, core-shell structure, electromagnetic wave absorbing SiC core. The formation mechanism of this kind of particle was also discussed. It was thought that this kind of particle was derived from the small PCS molecules released during the pyrolysis of PCS precursor. Moreover, the carbon atoms participating in the growth of graphene was believed to separate out from the SiC nucleus at higher temperature.

中文翻译：

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用于电磁波吸收材料应用的银耳状石墨烯@SiC纳米结构的合成

摘要 通过热解聚碳硅烷(PCS) 合成了一种具有“银耳状”表面和核壳结构的颗粒。“银耳状”表面主要由石墨烯组成，石墨烯在原子核上垂直生长。晶核由多晶碳化硅组成，其中β-碳化硅纳米晶随机分散在非晶基体中。这种颗粒被认为在电磁波吸收材料应用中具有巨大的潜力，因为它具有巨大的比表面积、核壳结构、吸收电磁波的碳化硅核。还讨论了这种粒子的形成机制。据认为，这种颗粒来源于 PCS 前驱体热解过程中释放的小 PCS 分子。而且，