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Mixed oxide aerogels with high performance insulating properties for high temperature space application

Vöpel, Pascal and Heyer, Markus and Esser, Burkard and Gülhan, Ali and Milow, Barbara (2022) Mixed oxide aerogels with high performance insulating properties for high temperature space application. 6th International Seminar on Aerogels, 28.-30. September 2022, Hamburg.

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Abstract

Aerogels itself have already proven their outstanding thermal performances and insulative properties. However, classical silica aerogels often are limited in their application due to melting and/or heavy sintering effects. By these structural changes and reconstructions the properties of the aerogels are lost. New space-related applications require higher thermal stabilities although only for short periods of time. Within this work we present the development and performance studies of fiber reinforced mixed metal oxides aerogels as ablator material for potential space applications. The new type of fiber reinforced composite is directly compared to a pristine high temperature fiber insulation, an fiber reinforced aerogel as well as an fiber reinforced and opacified aerogel. As most important parameters the processability, the thermal stability as well as thermal conductivity is presented. Thermal loads are imeeted in an arc-heated facility in order to analyze the high-temperature stability of the pure oxidic aerogels and mixed oxide SiO2 / Al2O3 fiber reinforced aerogels. All aerogels and compared fiber materials were examined in terms of temperature depending thermal conductivity to the point of failure, temperature transition through the material during the single-sided thermal treatment, crystallization behaviour by means of X-Ray-diffraction and their microstructure using SEM. Concluding, it can be stated that mixed metal oxides show the highest stability towards short-term temperature and also the temperature at the backside of the specimen increases least fast.

Item URL in elib:https://elib.dlr.de/188738/
Document Type:Conference or Workshop Item (Poster)
Title:Mixed oxide aerogels with high performance insulating properties for high temperature space application
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Vöpel, PascalUNSPECIFIEDhttps://orcid.org/0000-0001-8233-7261UNSPECIFIED
Heyer, MarkusUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Esser, BurkardUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gülhan, AliUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Date:29 September 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Aerogels, High Temperature Insulation, thermal protection, Metal oxide
Event Title:6th International Seminar on Aerogels
Event Location:Hamburg
Event Type:international Conference
Event Dates:28.-30. September 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II (old), V - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Institute for Aerodynamics and Flow Technology > Supersonic and Hypersonic Technology
Deposited By: Vöpel, Dr. Pascal
Deposited On:28 Nov 2022 08:43
Last Modified:28 Nov 2022 08:43

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