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1. Aerogel texture
Compared with conventional xerogels, aerogels have a significantly greater pore volume. However, although their specific surface area is large, it is not very different from that of the same gel dried in the conventional way. Measuring the textural characteristics of aerogels requires a good understanding of the modifications that can be induced by measurement techniques. The low elastic modulus values and low permeability of gels (cf. § 3.1).
1.1 Density and porosity
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Density
Aerogel density is easily obtained by weighing monolithic samples of known dimensions.
The density of silica aerogels can vary from 3 × 10 ...
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Aerogel texture
Aerogel structure
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