期刊
JOURNAL OF MATERIALS SCIENCE
卷 46, 期 18, 页码 5940-5947出版社
SPRINGER
DOI: 10.1007/s10853-011-5549-x
关键词
-
资金
- National Science Foundation of China (NSFC) [50973113]
A new liquid polyborosilazane precursor for Si-B-C-N ceramic was synthesized by co-condensation reaction of boron trichloride, organodichlorosilanes, and hexamethyldisilazane. The structure and properties of polyborosilazane were studied by means of Fourier transform-infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), rheology, and thermogravimetric analysis (TGA). The conversion of polymer to ceramic and the high-temperature behavior of the new polymer-derived ceramic were investigated by TG-MS, FT-IR, X-ray diffraction (XRD) and high-temperature TGA (HTGA). The ceramics showed good oxidative resistance and thermal stability with weight gain of 1.8 wt% at 1350 A degrees C under air atmosphere and weight loss of 2.6% at 1900 A degrees C under Ar atmosphere.
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