Thermophysical Properties of High-Thermal-Conductivity Graphite Sheets for Spacecraft Thermal Design

H. Nagano, A. Ohnishi, Yuji Nagasaka

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21 Citations (Scopus)

Abstract

Thermophysical properties of a new material - a graphite sheet, which has characteristics of high thermal conductivity, anisotropy, lightweight and flexibility - have been measured in order to apply this sheet to a spacecraft thermal control material. The following measurements were performed: 1) The thermal diffusivities in the in-plane and out-of-plane directions were measured over the temperature range from 100 to 350 K using a laser heating ac calorimetric method. 2) The specific heat and the total hemispherical emittance were measured over the temperature range from 173 to 375 K using a transient calorimetric method. 3) The solar absorptance was measured using a spectroscopic method for angles of incidence ranging from 5 to 60 deg. Additionally, the thermal conductivities and the specific thermal conductivities were calculated using the measured results, and the high potential of this graphite sheet as a material for spacecraft thermal control was confirmed.

Original languageEnglish
Pages (from-to)347-353
Number of pages7
JournalJournal of Thermophysics and Heat Transfer
Volume15
Issue number3
Publication statusPublished - 2001 Jul

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ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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