Ocejo, MartaGoiti, EunateSalinas-Garzón, JuanIbáñez-Gómez, José Antonio2024-07-242024-07-242024-03-01Ocejo , M , Goiti , E , Salinas-Garzón , J & Ibáñez-Gómez , J A 2024 , ' Preparation and properties of aluminosilicate aerogels from boehmite and waterglass ' , Materials Chemistry and Physics , vol. 315 , 128912 . https://doi.org/10.1016/j.matchemphys.2024.1289120254-0584https://hdl.handle.net/11556/3412Publisher Copyright: © 2024 Elsevier B.V.Aluminosilicate aerogels are promising thermal insulation materials for high temperature applications. In this study, aluminosilicate aerogels were effectively synthesised using affordable precursors: dispersible boehmite powder and waterglass solutions, with subsequent drying achieved by supercritical CO2 processing. According to the evaluation of their properties, the Al–Si aerogels exhibited low densities (0.11 g/cm3), low thermal conductivities (<0.021 W/m·K) and high specific surface areas (SSA) (516 m2/g for an Al:Si molar ratio of 3:1). When waterglass-based aerogel and aluminosilicate samples were treated at high temperature (1200 °C), the formation of mullite was demonstrated for the aluminosilicate aerogel with a molar ratio of Al:Si 3:1, which showed a higher value for SSA compared to the waterglass-based aerogel.enginfo:eu-repo/semantics/restrictedAccessjournal article10.1016/j.matchemphys.2024.128912AerogelBoehmiteThermal propertiesWaterglassGeneral Materials ScienceCondensed Matter Physicshttp://www.scopus.com/inward/record.url?scp=85182733641&partnerID=8YFLogxK