RT Journal Article
T1 Preparation and properties of aluminosilicate aerogels from boehmite and waterglass
A1 Ocejo, Marta
A1 Goiti, Eunate
A1 Salinas-Garzón, Juan
A1 Ibáñez-Gómez, José Antonio
AB 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.
SN 0254-0584
YR 2024
FD 2024-03-01
LK https://hdl.handle.net/11556/3412
UL https://hdl.handle.net/11556/3412
LA eng
NO Ocejo , 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.2024.128912
NO Publisher Copyright: © 2024 Elsevier B.V.
NO This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
DS TECNALIA Publications
RD 30 jul 2024