Nota de FísicaPublicado
A SAXS Study of Silica Aerogels
A. Craievich; M.A. Aegerter; D.I. dos Santos,; T. Woignier; J. Zarzycki
1986
Dados da publicação
- Autores
- A. Craievich; M.A. Aegerter; D.I. dos Santos,; T. Woignier; J. Zarzycki
- Tipo
- Nota de Física
- Status
- Publicado
- Data de publicação
- 1986
- Descrição
- 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.
- Ano
- 1986
- Número
- CBPF-NF-014/86
- Vínculo com tese
- Não
- Vínculo com bolsa
- Não