This work was developed under the project “AerTPS—Aerogel Thermal Protection Systems” by the Consortium “Active Space Technologies/Faculdade de Ciências e Tecnologia da Universidade de Coimbra/Instituto Pedro Nunes (AST/FCTUC/IPN)”, funded by QREN, under the Operational Programme for Competitiveness Factors granted by the European Regional Development Fund. Alyne Lamy-Mendes acknowledges CNPq (Brazil) for the funding of the PhD fellowship project 234184/2014-0/GDE, under the programme “Ciência sem Fronteiras”. The authors also acknowledge the support of the CIEPQPF research unit (Coimbra), funded by FEDER funds through the Operational Programme for Competitiveness Factors—COMPETE and National Funds, through FCT—Foundation for Science and Technology, under the projects POCI-01-0145-FEDER-006910 and UID/EQU/00102/2013