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Synthesis and Characterization of Ceramic Precursor Aluminum-Containing Polycarbosilane and its Pyrolysis

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Abstract

The aluminum-containing polycarbosilane (Al-PCS) was synthesized by reaction of an aluminum alkoxide with polycarbosilane (PCS). The Al-PCS product was characterized by element analysis, gel permeation chromatography (GPC), as well as Fourier transform (FT-IR) and nuclear magnetic resonance (1H, 29Si, 13C, and 27Al NMR) spectroscopy. The results show that Al-PCS is very similar to PCS in structure. This preceramic precursor is described as a dispersion of Al(AcAc)3-based particles in the PCS chain matrix. The pyrolysis process of Al-PCS was investigated by thermogravimetry (TG), FT-IR, and X-ray diffraction (XRD). The pyrolysis of Al-PCS includes three sequential stages: First, the condensation and thermal decomposition into the inorganic state; second, the transition toward the third stage involving the thermal decomposition of the side chains into an amorphous state; third, the crystallization of β-SiC.

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Acknowledgments

This work was supported by the State Key Program of the National Natural Science Foundation of China (Grant No 50532010) and the National Science Foundation for Post-doctoral Scientists of China (Grant No 20060390704).

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Authors and Affiliations

  1. Advanced Materials Laboratory, Department of Materials Science and Engineering, Xiamen University, Xiamen, Fujian, 361005, People’s Republic of China

    Yuxi Yu, Ying Zhang, Jingming Yang & Ming Tang

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  1. Yuxi Yu
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  2. Ying Zhang
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  3. Jingming Yang
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Correspondence to Yuxi Yu.

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Yu, Y., Zhang, Y., Yang, J. et al. Synthesis and Characterization of Ceramic Precursor Aluminum-Containing Polycarbosilane and its Pyrolysis. J Inorg Organomet Polym 17, 569–575 (2007). https://doi.org/10.1007/s10904-007-9143-2

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  • DOI: https://doi.org/10.1007/s10904-007-9143-2

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