Vo2-Based Switchable Radiator for Spacecraft Thermal 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 VO2 thin film based resonant absorber. The measured radiated power difference between 300 K and 373 K was 480 W/m(2) corresponding to a 7x difference in radiative cooling power. We present theoretical and experimental radiator values for both normal and hemispherical as well the optical properties of VO2 as determined via infrared spectroscopic ellipsometry.

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Document Details

Document Type
Technical Report
Publication Date
Aug 05, 2019
Accession Number
AD1098551

Entities

People

  • Alberto Piqué
  • Donald E. Wilson
  • Heungsoo Kim
  • Kristin M. Charipar
  • Kwok Cheung
  • Nicholas A. Charipar
  • Raymond C. Auyeung

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Artificial Satellites
  • Environment
  • Films
  • Heat Energy
  • Materials
  • Measurement
  • Optical Properties
  • Phase Transformations
  • Power Measurement
  • Radiation
  • Reflectance
  • Refractive Index
  • Space Environments
  • Spacecraft
  • Thin Films
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Phased Array Antenna Design.
  • Plasma Physics.

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers