Synthesis and thermal behavior of polymeric precursors for Si?B?C?N ceramic |
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| Authors: | Shaohua Dong Tong Zhao Caihong Xu |
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| Affiliation: | 1. Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Science, Beijing 100190, China;2. Graduate School of the Chinese Academy of Science, Beijing 100039, China |
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| Abstract: | Polyborosilazanes (PBSZs) were synthesized by co‐ammonolysis of 2,4,6‐trichloroborazine and dichloromethylsilane and used as precursors for Si? B? C? N ceramics. The pyrolyzed products were characterized with Fourier transform infrared, X‐ray photoeletron spectroscopy, thermogravimetric analysis (TGA), X‐ray diffraction, and scanning electron microscopy (SEM). The results indicated the content of B or Si plays an important role in controlling the high temperature behavior of the precursors. The resistance of the ceramics, which were obtained from pyrolysis of PBSZs at 1500°C, toward oxidative attack up to 1000°C was also investigated by TGA and SEM/EDX. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 |
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| Keywords: | synthesis thermal properties pyrolysis polyborosilazane Si?B?C?N ceramic |
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