Abstract
Small angle X-ray scattering (SAXS) with synchrotron radiation as X-ray source has been used to study the structure of silica xerogets prepared by sol-get process. Both the agreement of SAXS profiles with and the deviation from Porod’s law and Debye’s theory have been found, showing that there are differences between the structures of these xerogets. The specific surfaces of the samples whose SAXS profiles agreed with Porod’s law and Debye’s theory have been determined by analyzing SAXS data according to the methods of Porod and Debye, respectivety, and the results of both methods used were found to be similar. We have proposed the corresponding Porod and Debye analysis methods to determine the specific surfaces of samples whose SAXS profiles do not agree with Porod’s law and Debye’s theory, i.e. the negative or positive deviation. The results of both methods used here were also found to be close to each other. The specific surfaces fell between approximatety 80–150 m2/cm3 for the samples prepared under various conditions.
Similar content being viewed by others
References
Li Zhihong, Wu Dong, Sun Yuhan, Application of SAXS in structural study of porous material (II)-Application of SAXS, Coal Conversion (in Chinese), 1999, 22(suppl.): 93.
Pei Guangwei, Zhong Weilie, Yue Shubin (ededs.), X-ray diffraction of monocrystal, in Polycrystal and Noncrystal Matter (in Chinese), Jinan: Shandong University Press, 1989, 386–445.
Brown, D. S., Warner, F. P., Wetton, R. E., Surface areas of fillers in polymers by small-angle X-ray scattering. Polymer, 1972,13(12): 575.
Huang Shengtao (ed.). X-ray Science of Solid (Vol. II) (in Chinese), Beijing: Higher Education Press, 1990,318–384.
Zhu Yueping, The measuring method and the data processing of SAXS, Journal of Chinese User of the Rigaku X-ray Difrractometer (in Chinese), 1995,8(2): 149.
Attila, B., Modification of the structure of an active carbon by heat treatment, J. Appl. Cryst., 1991, 24: 635.
Cohaut, N., Guet, J. M., Diduszko, R., SAXS investigations on the porosity of pitch based carbon fibres, Carbon, 1996, 34: 674.
Koberstein, J. T., Morra, B., Stein, R. S., The determination of diffuse-boundary thickness of polymers by small angle X-ray scattering, J. Appl. Cryst., 1980, 13: 34.
Zhang Ming, Meng Fanling, Meng Zhaofu, SAXS study on the microstructure of the matrices of carbon fibre, Acta Scientiarum Naturalium Universitatis Jilinensis (in Chinese), 1997, 1: 66.
Meng Zhaofu, Wang Yuming, The determination of the internal specific surface of two-phase system by small angle X-ray scattering, Journal of Chinese User of the Rigaku X-ray Diffiractometer (in Chinese), 1992, 5(1): 49.
Author information
Authors and Affiliations
Corresponding author
About this article
Cite this article
Li, Z., Sun, J., Wu, D. et al. Determination of specific surfaces of silica xerogets by SAXS. Chin. Sci. Bull. 45, 1386–1390 (2000). https://doi.org/10.1007/BF02886243
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02886243