ISSN:
1573-4846
Keywords:
silicon oxycarbide glasses
;
cross-linked polysiloxanes
;
29Si solid-state nuclear magnetic resonance
;
X-ray photoelectron spectroscopy
;
redistribution reactions
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Silicon oxycarbide phases with different O/Si ratios were prepared by pyrolysis of highly cross-linked polysiloxane precursors. Their structure was investigated using quantitative29Si solid-state NMR and X-ray photoelectron spectroscopy (XPS). The prominent part played by the redistribution reactions on the ceramic yield, the composition of the oxycarbide phases and their structure was illustrated. In a large range of compositions the oxycarbide phases formed by pyrolysis at moderate temperature (〈1000°C) may be described as a purely random arrangement of CSi4 tetrahedra and Si−O−Si bridges.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02436860
Permalink
