Skip to main content Accessibility help

NMR Characterization of Silicon Carbides and Carbonitrides. A Method for Quantifying the Silicon Sites and the Free Carbon Phase.

  • C. Gerardin (a1), M. Henry (a1) and F. Taulelle (a1)


With ceramics prepared from organic precursors, polymers are often formed by thermolysis, and the ceramics are obtained by pyrolysis of the polymer. This paper will cover the NMR methods used to characterize the polymerization as well as the pyrolysis of such polymers. The reticulation rate of such materials is measured on the silicon atoms and on the carbon atoms, leading to a silicon reticulation state and a carbon reticulation state. For the ceramics, the quantification of the SiCxH4−x or SiCxN4−x sites is performed using a priori chemical shift calculation. A measure of the H/C of the free carbon phase at the different temperatures of pyrolysis is presented. This measure uses a absolute determination of hydrogen content in ceramics, more accurate than a classical chemical analysis of hydrogen. The evolution of the reticulation, of the free carbon amount and of the H/C ratio in the free carbon phase will be followed with the temperature.



Hide All
[1] Bacque, E., Pillot, J. P., Birot, M. and Dunoguès, J., Macromolecules, 21, 30 (1988)
[2] Zhang, Z. F., Babonneau, F., Laine, R. M., Mu, Y., Harrod, J.F. and Ramm, J. A. J. Am. Ceram. Soc. 24, 670 (1991)
[3] West, R., David, L. D., Djurivich, P. I., Yu, H., Sinclair, R. Am. Ceram. Soc. Bull. 62, 899 (1983)
[4] Boury, B., Carpenter, L., Corriu, R., and Mutin, H. New J. Chem. 14, 535 (1990)
[5] Speier, J. L. Adv. Organomet. Chem. 17 407 (1979)
[6] Gerardin, C. Ph. D. Dissertation, University P. and M Curie, Paris 1991 and This MRS session 1992 Poster N11.1
[7] Oberlin, A. in Chemistry and Physics of Carbon, (Ed. Thrower, P. A., Dekker New York), 22, 1 (1989)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed