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艾素芬, 向艳超, 雷尧飞, 薛淑艳, 沈宇新, 殷雷, 刘佳, 陈维强. 火星车低密度纳米气凝胶隔热材料制备及性能研究[J]. 深空探测学报(中英文), 2020, 7(5): 466-473. DOI: 10.15982/j.issn.2096-9287.2020.20200036
引用本文: 艾素芬, 向艳超, 雷尧飞, 薛淑艳, 沈宇新, 殷雷, 刘佳, 陈维强. 火星车低密度纳米气凝胶隔热材料制备及性能研究[J]. 深空探测学报(中英文), 2020, 7(5): 466-473. DOI: 10.15982/j.issn.2096-9287.2020.20200036
AI Sufen, XIANG Yanchao, LEI Yaofei, XUE Shuyan, SHEN Yuxin, YIN Lei, LIU Jia, CHEN Weiqiang. Preparation and Characterization of Ultra-low Density Nano-aerogel Insulation Materials for Mars Rover[J]. Journal of Deep Space Exploration, 2020, 7(5): 466-473. DOI: 10.15982/j.issn.2096-9287.2020.20200036
Citation: AI Sufen, XIANG Yanchao, LEI Yaofei, XUE Shuyan, SHEN Yuxin, YIN Lei, LIU Jia, CHEN Weiqiang. Preparation and Characterization of Ultra-low Density Nano-aerogel Insulation Materials for Mars Rover[J]. Journal of Deep Space Exploration, 2020, 7(5): 466-473. DOI: 10.15982/j.issn.2096-9287.2020.20200036

火星车低密度纳米气凝胶隔热材料制备及性能研究

Preparation and Characterization of Ultra-low Density Nano-aerogel Insulation Materials for Mars Rover

  • 摘要: 火星存在平均压力约600 Pa的CO2气体环境,以及最低温度约–123 ℃的温度环境,超轻质、高效隔热材料是火星车热控系统的关键性材料,保证内部电子元器件正常工作。气凝胶材料是目前大气环境下导热系数最低的固体材料,是火星车最佳的保温隔热材料方案。针对我国火星车应用需求,研制了密度小于30 kg/m3的低密度纳米气凝胶隔热材料,研究了低密度气凝胶的制备、复合材料的制备、超临界CO2干燥以及低密度气凝胶复合材料机加等制备过程,并表征了材料的热物理性能、真空挥发性以及热循环、热真空等空间热环境下的性能,表明低密度纳米气凝胶隔热材料在火星环境下具有良好的结构稳定性和隔热性能稳定性,可满足空间探测的应用需求。该材料具有良好的机加性能和优异的隔热性能,它的火星大气下室温导热系数为0.006 6 W/(m·K),实现了在我国火星车上的工程应用。

     

    Abstract: It is an atmospheric environment with an average pressure as 600 Pa of CO2 and a minimum temperature of -123 ℃ in Mars. Ultra-low quality and high efficient thermal insulation material is the key material for the thermal control system of Mars Rover to ensure the normal operation of electronic components. Aerogel is the solid material with the lowest thermal conductivity in the atmospheric environment. Therefore, it is the best insulation material choice for the thermal control of Mars Rover. To meet the need of Mars Rover, a low density nano-aerogel insulation material with density of less than 30 kg/m3 has been developed in this article. The preparation process of low density aerogel and composite materials, and the supercritical CO2 drying and ultra-low density aerogel composite’s being machined process are studied. The thermal physical properties, vacuum volatiles, the properties in the thermal cycling, thermal vacuum and other thermal environments are also characterized. The results show that the ultra-low density nano-aerogel insulation material has excellent structural and heat insulation stability in the Martian environment, which can meet the application requirement of space exploration. The material has good mechanical property and excellent thermal insulation property. The thermal conductivity of the low density aerogel composites is 0.0066 W/(m·K)at room temperature in Martian atmosphere which has been applied the Mars Rover in China.

     

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