SAXS characterization of nanochannels in polymer-derived SiC fibers

被引：0

作者：

Chu, Z. Y. ^{[1
]}

He, R. A. ^{[1
]}

Li, X. D. ^{[1
]}

Cheng, H. F. ^{[1
]}

Wang, J. ^{[1
]}

机构：

[1] Natl Univ Def Technol, Key Lab New Ceram Fibers & Composites, Changsha 410073, Peoples R China

来源：

HIGH-PERFORMANCE CERAMICS IV, PTS 1-3 | 2007年 / 336-338卷

关键词：

silicon carbide fiber; nanochannel; SAXS;

D O I：

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

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

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 partially-pyrolyzed 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.

引用

页码：1301 / 1303

页数：3