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. Copyright © 1991, Wiley Blackwell. All rights reserved
Chemical Characterization of Si-Al-C-O precursor and Its Pyrolysis
Sorarù, Gian Domenico;
1991-01-01
Abstract
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. Copyright © 1991, Wiley Blackwell. All rights reservedFile in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
