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Aerodynamic levitator furnace for measuring thermophysical properties of refractory liquids

Langstaff, D and Gunn, M and Greaves, GN and Marsing, A and Kargl, F (2013) Aerodynamic levitator furnace for measuring thermophysical properties of refractory liquids. Review of Scientific Instruments, 84, p. 124901. American Institute of Physics (AIP). doi: [http://dx.doi.org/10.1063/1.4832115]. ISSN 0034-6748.

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Abstract

The development of novel contactless aerodynamic laser heated levitation techniques is reported that enable thermophysical properties of refractory liquids to be measured in situ in the solid, liquid, and supercooled liquid state and demonstrated here for alumina. Starting with polished crystalline ruby spheres, we show how, by accurately measuring the changing radius, the known density in the solid state can be reproduced from room temperature to the melting point at 2323 K. Once molten, by coupling the floating liquid drop to acoustic oscillations via the levitating gas, the mechanical resonance and damping of the liquid can be measured precisely with high-speed high-resolution shadow cast imaging. The resonance frequency relates to the surface tension, the decay constant to the viscosity, and the ellipsoidal size and shape of the levitating drop to the density. This unique instrumentation enables these related thermophysical properties to be recorded in situ over the entire liquid and supercooled range of alumina, from the boiling point at 3240 K, until spontaneous crystallization occurs around 1860 K, almost 500 below the melting point. We believe that the utility that this unique instrumentation provides will be applicable to studying these important properties in many other high temperature liquids.

Item URL in elib:https://elib.dlr.de/87127/
Document Type:Article
Title:Aerodynamic levitator furnace for measuring thermophysical properties of refractory liquids
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Langstaff, Dentre for Advanced Functional Materials and Devices, Institute of Mathematics and Physics, Aberystwyth University, Aberystwyth SY23 3BZ, United KingdomUNSPECIFIED
Gunn, Mentre for Advanced Functional Materials and Devices, Institute of Mathematics and Physics, Aberystwyth University, Aberystwyth SY23 3BZ, United KingdomUNSPECIFIED
Greaves, GNAberystwyth Univ, Ctr Adv Funct Mat & Devices, Inst Math & Phys, Aberystwyth SY23 3BZ, Dyfed, Wales;UCL, Dept Chem, London WC1H 0AJ, England; UCL, Mat Chem Ctr, London WC1H 0AJ, EnglandUNSPECIFIED
Marsing, AInstitut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany und Fachbereich Physik, Universität Konstanz, 78457 KonstanzUNSPECIFIED
Kargl, FInstitut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, GermanyUNSPECIFIED
Date:5 December 2013
Journal or Publication Title:Review of Scientific Instruments
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:84
DOI :[http://dx.doi.org/10.1063/1.4832115]
Page Range:p. 124901
Publisher:American Institute of Physics (AIP)
ISSN:0034-6748
Status:Published
Keywords:aerodynamic levitation thermophysical properties acoustic excitation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Kargl, Dr Florian
Deposited On:03 Jan 2014 08:03
Last Modified:06 Sep 2019 15:29

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