Physics NotePublished
A SAXS Study of Silica Aerogels
A. Craievich; M.A. Aegerter; D.I. dos Santos,; T. Woignier; J. Zarzycki
1986
Publication details
- Authors
- A. Craievich; M.A. Aegerter; D.I. dos Santos,; T. Woignier; J. Zarzycki
- Type
- Physics Note
- Status
- Published
- Publication date
- 1986
- Description
- Aerogels produced by hypercritical drying of gels from hydrolysis of TMOS in various pH conditions and subjected to a densification process were studied by SAXS using LURE synchrotron facility. The evaluation of scattering data combined with BET measurements leads to a model of aerogels consisting of a light density matrix in which meso-and macro-pores are embedded. No fractal features we observed for the gels, the Porod's limit having an exponent n=4. This could mean that either these aerogels are not fractals or that the SAXS method suffers from an inherent ambiguity for fractal dimension D=3.
- Year
- 1986
- Number
- CBPF-NF-014/86
- Linked to a thesis
- No
- Linked to a grant
- No