Investigation of the pore structure in glass-like carbon prepared from furan resin

Small-angle X-ray scattering (SAXS) measurements were carried out on glass- like carbons (GCs) prepared from furan resin at 950 degreesC and thereafter treated at various temperatures. The scattering intensities grow gradually with increasing heat-treatment temperature (HTT) up to 1600-1800 degreesC. and then the intensities increase abruptly at HTT higher than 1800 degrees C. HTT dependence of the reciprocal width for the 002 peaks shows a similar behavior. Distance distribution functions (DDFs) were obtained by the Four ier transform of the SAXS intensities, from which the changes of the gyrati on radius and the shape of pores in the GC with increase of HTT are discuss ed. The HTT dependence of the structural change of the GCs from furan resin is almost the same as that of GCs from phenolic resin. However, it was fou nd that the GC prepared at 1200 degreesC from furan resin shows a peculiar behavior, namely, the largest interlayer spacing in the carbon matrix and t he smallest value of the gyration radius for pores. (C) 2001 Elsevier Scien ce Ltd. All rights reserved.