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Chemical Characterization of Si‐Al‐C‐O Precursor and Its Pyrolysis
Author(s) -
Babonneau Florence,
Sorarú Gian D.,
Thorne Kevin J.,
Mackenzie John D.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb07172.x
Subject(s) - alkoxide , magic angle spinning , pyrolysis , materials science , ceramic , aluminium , diffraction , characterization (materials science) , magic angle , crystallography , chemistry , composite material , nanotechnology , nuclear magnetic resonance spectroscopy , organic chemistry , catalysis , physics , optics
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 ( 29 Si, 27 Al, and 13 C) 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.