Please use this identifier to cite or link to this item: doi:10.22028/D291-24033
Title: Structural studies of fractal silica aerogels
Author(s): Dos Santos, Dayse Iara
Aegerter, Michel A.
Craievich, Aldo F.
Lours, Thierry
Zarzycki, Jerzy
Language: English
Year of Publication: 1987
OPUS Source: Journal of non-crystalline solids. - 95/96. 1987, 2, S. 1143-1150
SWD key words: Alkalilösliche Kieselsäure
Biologischer Expositionstest
Dichte <Physik>
DDC notations: 620 Engineering and machine engineering
Publikation type: Journal Article
Abstract: The structural properties of silica aerogels of various compositions and prepared in acidic, neutral and basic conditions are studied by SAXS, BET, density and TEM techniques. All structures can be described as mass fractals (D < 3). Observation of cross over points in the scattering curves confirms the existence of structural units forming the SiO2 matrix having average size of - 13.5 Å (basic), - 8.5 Å (neutral) and < 7 Å(acidic). The hypercritical drying process smoothes slightly the structural units surfaces but does not alter the overall structure. Results are consistent with an aerogel model formed by a light amorphous matrix having a porosity occupying the lower volume fraction. © 1987 Elsevier Science Publishers B.V.
Link to this record: urn:nbn:de:bsz:291-scidok-21596
Date of registration: 26-May-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
SciDok - Der Wissenschaftsserver der Universität des Saarlandes

Files for this record:
File Description SizeFormat 
AEG094.pdf1,67 MBAdobe PDFView/Open

Items in SciDok are protected by copyright, with all rights reserved, unless otherwise indicated.