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Monolithic silica aerogels (SiO2) are prepared using the tetraethylorthosilicate (TEOS) as precursor via a rapid supercritical extraction method (RSCE). The effect of heat treatment on the textural and physical characteristics of RSCE-samples are compared with those of the other two conventional supercritical extraction method, i.e. the alcohol supercritical extraction (ASCE) and CO2 supercritical...
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