The densification of mass-fractal aerogels to fused silica: A Raman study of vibrational evolution

J. Pelous, J.L. Sauvajol, T. Woignier and R. Vacher

Physica A: Statistical Mechanics and its Applications, 1989, vol. 157, issue 1, 625-629

Abstract: The low frequency Raman spectrum has been investigated for porous silica aerogels progressively densified, starting from a mass-fractal sample to obtain finally fused silica. The spectra show a broad peak due to modes characteristic of the constituent particles of mean dimension a. In the first stage of densification the peak shifts to lower frequencies corresponding to an increase of a. The disappearance of the peak below the instrumental resolution is accompanied with the appearance of the usual fused silica spectral features.

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:157:y:1989:i:1:p:625-629

DOI: 10.1016/0378-4371(89)90374-9

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