Thermophysical Properties of High-Thermal-Conductivity Graphite Sheets for Spacecraft Thermal Design
Thermophysical Properties of High-Thermal-Conductivity Graphite Sheets for Spacecraft Thermal Design
复制标题
航天器热设计用高导热石墨片的热物理性能
DOI：
10.2514/2.6614
复制
发表时间：
2000
影响因子：
2.1
通讯作者：
Y. Nagasaka
中科院分区：
文献类型：
--
作者：
H. Nagano;A. Ohnishi;Y. Nagasaka
为了将石墨薄片应用于航天器热控材料，对一种具有高导热性、各向异性、轻质和柔性等特点的新型材料--石墨薄片的热物理性能进行了测试。进行了以下测量：1）使用激光加热ac量热法在100至350 K的温度范围内测量面内和面外方向上的热扩散率。2)比热和总半球发射率的测量温度范围从173至375 K使用瞬态量热法。3)太阳能吸收率是使用光谱方法测量的入射角范围从5度到60度。此外，还根据测定结果计算了导热率和比导热率，确认了该石墨片作为航天器热控制材料的高潜力。
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.