Numéro
J. Phys. IV France
Volume 03, Numéro C8, Décembre 1993
IX International Conference on Small Angle Scattering
Page(s) C8-393 - C8-396
DOI http://dx.doi.org/10.1051/jp4:1993882
IX International Conference on Small Angle Scattering

J. Phys. IV France 03 (1993) C8-393-C8-396

DOI: 10.1051/jp4:1993882

Small angle scattering study of silica gels and zeolites

T.P.M. BEELEN1, W.H. DOKTER1, H.F. VAN GARDEREN1, R.A. VAN SANTEN1 and E. PANTOS2

1  Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
2  SRS Daresbuly Laboratory, Warrington, U.K.


Abstract
Silica hydrogels show fractal properties corresponding with DLCAA or RLCCA. During aging silica is redistributed, resulting in reinforcement of the tenuous structure and only slightly disturbing fractal geometry. In zeolitic precursors no mass-fractals are present, but SAXS spectra show strong indications for the presence of surface-fractals. Computer simulations do confirm the experimental results.



© EDP Sciences 1993