Skip to Main content Skip to Navigation
Book sections

Aerogel Sintering: From Optical Glasses to Nuclear Waste Containment

Abstract : Aerogels are ultraporous materials with a very low permeability. They exhibithigh specific surface area but, due to their huge porous volume, their mechanical properties are quite poor. Aerogels belong to two main families: inorganic materials as silica, silicates, and a few aluminates and organic aerogels which are easily transformed into carbon aerogels by a simple pyrolysis thermal treatment. In this chapter, we mainly report experiments performed on alcohol-dried aerogels. Due to their broad range of porosity, aerogels canfitin very different applications: from analysis of cosmic dust to nuclear waste containment glasses. Advantages of large porosity are sometimes used directly like in thermal and acoustic insulation, or in catalyzers, but a too high pore volume can also be a drawback like in glass precursor and host matrix. Fortunately, aerogel porosity can be tailored using sintering or room isostatic compression or eventually a combination of both methods. Knowledge in this area allows now to synthesize aerogels with a broad range of porosity and also a very broad range of texture.
Document type :
Book sections
Complete list of metadatas

Cited literature [38 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-01929789
Contributor : Catherine Rebufa <>
Submitted on : Wednesday, November 21, 2018 - 2:08:23 PM
Last modification on : Tuesday, January 14, 2020 - 10:38:13 AM
Long-term archiving on: : Friday, February 22, 2019 - 2:01:11 PM

File

PDF-5.pdf
Files produced by the author(s)

Identifiers

Citation

Jean Phalippou, P. Dieudonné, A Faivre, Thierry Woignier. Aerogel Sintering: From Optical Glasses to Nuclear Waste Containment. Handbook of Sol-Gel Science and Technology Processing: Characterization and Applications, pp.1949 - 1969, 2018, 978-3-319-32101-1. ⟨10.1007/978-3-319-32101-1_56⟩. ⟨hal-01929789⟩

Share

Metrics

Record views

190

Files downloads

282