In cooperation with the Technische Universität Hamburg-Harburg, the Zentrum für angewandte Energieforschung Bayern and the Universität Salzburg, the Deutsches Zentrum für Luft- und Raumfahrt will organize the first International Summer School Aerogels for undergraduate and graduate students. During this summer school, participants will be introduced to the fascinating properties of aerogels.
Aerogels have an extremely high nano-porosity and therefore exhibit extraordinary properties: high pore volume (up to 99 %), ultralow density (0.2 – 0.5 g/cm3), high surface area (up to 1200 m2/g). They can be synthesized from inorganic or organic precursors. Currently silica aerogels are the most frequently used and have a wide range of applications. Aerogels are the best known thermal insulators (thermal conductivity < 5 mW/mK) and are almost inert against molten metal.
Inorganic aerogels can be prepared via sol-gel processing, a technique which requires alcoxides or metal salts in alcoholic or aqueous solutions. After mixing, a dispersion of colloidal particles are generated (hydrolysis and condensation polymerisation) which form a three-dimensional network (gelation). The particle size depends on the catalyst and varies between nanometer and micrometer scale. After the gelation process the enclosed pore liquid has to be carefully removed to preserve the nanostructure of the aerogel.
Experts will present their work about aerogels. They will talk about the synthesis and the drying process of aerogels as well as their characterization and applications. In the laboratory participants will produce both organic and inorganic aerogels. Different drying techniques will be evaluated and the aerogel samples will be characterized by microscopy, nitrogen adsorption-desorption and thermogravimetric analysis.
Deutsches Zentrum für Luft- und Raumfahrt,Institut für Materialphysik im WeltraumCologne
October 6-8, 2010
Students: 70 €,others: 150 €grants possible
Registration and information:
Dr. rer. nat. Barbara MilowTel.: +49 2203 601 3537
Dr. rer. nat. Kathleen HeinrichTel.: +49 2203 601 2264