Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5440518 | Journal of the European Ceramic Society | 2017 | 10 Pages |
Abstract
In this contribution, we design a novel strategy to synthesize SiOC ceramics by pyrolysis of hyperbranched ferrocene-containing polysiloxane (HBPSO-VF) which are synthesized by the reaction of polysiloxane (PSO) with 1,1â²-Bis(dimethylvinylsilyl)ferrocene (VF). This SiOC ceramics show much lower crystallization temperature because of the capability of HBPSO-VF to incorporate metallic iron into the backbone of PSO. The usage of HBPSO-VF offers enhanced ceramic yield of 83 wt% at 1200 °C due to the deep cross-linking of hydrosilylation. Nano-sized SiC and turbostratic carbons are separated from amorphous SiOC phase when it is annealed at 1100 °C, while crystallization temperature is 1400 °C when PSO is used as polymer precursors. The minimum reflection coefficient (RCmin) of this nanocrystal-containing ceramic reaches â46 dB, exhibiting a promising prospect as a kind of electromagnetic wave (EMW) absorbing materials. This method also can be further extended to develop other functional Si-based polymer derived ceramic (PDC) systems for EMW absorption and shielding applications.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Wenyan Duan, Xiaowei Yin, Chunjia Luo, Jie Kong, Fang Ye, Hongxing Pan,