Scientific Reports · 2019 · 151 citations · 31 references
EngineeringAerospace EngineeringMaterials ScienceHeat TransferOptical MaterialsSpacecraft DesignHeat Transfer FundamentalsRadiative Heat TransferRadiative TransferTemperature MeasurementThermal Control SystemsThermal ManagementAbsorber MaterialsEllipsometryEmissivityOptical PropertiesRadiatorsSpacecraft Thermal ControlSpectroscopic EllipsometryThermal Control
Abstract Direct calorimetric measurements of a solid state passive switchable radiator for spacecraft thermal control have been performed in a simulated space environment. Dynamic emissivity control is provided by the thermochromic phase change in a multilayer VO 2 thin film based resonant absorber. The measured radiated power difference between 300 K and 373 K was 480 W/m 2 corresponding to a 7× difference in radiative cooling power. We present theoretical and experimental radiator values for both normal and hemispherical as well the optical properties of VO 2 as determined via infrared spectroscopic ellipsometry.
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Ultra-thin perfect absorber employing a tunable phase change material
Mikhail A. Kats, Deepika Sharma, Jiao Lin et al. · Applied Physics Letters · 2012 · 632 citations · Full text