1. Department of Continuum Mechanics, RWTH Aachen University, Eilfschornsteinstrasse 18, 52062 Aachen, Germany
2. Division Energy Efficiency, Bavarian Center for Applied Energy Research, Magdalene-Schoch Strasse 3, 97074 Würzburg, Germany
3. Department of Aerogels and Aerogel Composites, Institute of Materials Research, German Aerospace Center, Linder Höhe, 51147 Cologne, Germany