Chemical Characterization of Si-Al-C-O Precursor and Its Pyrolysis
| Autor: | John D. Mackenzie, Florence Babonneau, Gian Domenico Sorarù, Kevin J. Thorne |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
chemistry.chemical_classification
Argon Materials science Mineralogy chemistry.chemical_element Polymer chemistry.chemical_compound chemistry Chemical engineering Aluminium visual_art Alkoxide X-ray crystallography Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Dispersion (chemistry) Pyrolysis |
| Zdroj: | Journal of the American Ceramic Society. 74:1725-1728 |
| ISSN: | 1551-2916 0002-7820 |
| DOI: | 10.1111/j.1151-2916.1991.tb07172.x |
| Popis: | Polycarbosilane was modified by reaction with an aluminum alkoxide to get a precursor for Si-Al-C-O ceramics. The precursor was essentially characterized by magic-angle spinning nuclear magnetic resonance (29Si, 27Al, and 13C) and appeared as a dispersion of Al(OH)3-based particles in a polycarbosilane chain matrix. After the material was heat-treated under argon at 1500°C, X-ray diffraction showed that it crystallized mainly as SiC 2H. The presence of this rather unusual polytype for polycarbosilane-derived ceramics seemed to be related to the presence of aluminum atoms. |
| Databáze: | OpenAIRE |
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