SAXS Characterization of Nanochannels in Polymer-Derived SiC Fibers

Abstract:

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In the preparation of polymer-derived SiC fibers, nanochannels are believed to be formed in the early pyrolysis stages due to loss of large volumes of pyrolysis gases. In this paper, small angle X-ray scattering (SAXS) was applied to the characterization and calculation of nanochannels in partiallypyrolyzed SiC fibers. The SAXS measurements showed that nanochannels with a radius of 1.0-20 nm were formed for fibers heat-treated at 973K and 1173K. But their distributions were not continuous and at lower part of the distribution, a peak value was observed at about 1.2nm. This means if the nanochannels are finely controlled, the partially-pyrolyzed SiC fibers have great potential application in the fields of hydrogen storage, gas separation, and so on.

Info:

Periodical:

Key Engineering Materials (Volumes 336-338)

Edited by:

Wei Pan and Jianghong Gong

Pages:

1301-1303

DOI:

10.4028/www.scientific.net/KEM.336-338.1301

Citation:

Z. Y. Chu et al., "SAXS Characterization of Nanochannels in Polymer-Derived SiC Fibers", Key Engineering Materials, Vols. 336-338, pp. 1301-1303, 2007

Online since:

April 2007

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Price:

$35.00

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