| 气凝胶及其复合绝热材料的导热系数测量 |
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| 引用本文： | 魏高升,刘育松,张欣欣,刘登瀛.气凝胶及其复合绝热材料的导热系数测量[J].工程热物理学报,2011(4):667-670. |
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| 作者姓名： | 魏高升 刘育松 张欣欣 刘登瀛 |
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| 作者单位： | 华北电力大学电站设备状态监测与控制教育部重点实验室;北京市可持续发展中心能源部;北京科技大学机械工程学院;中国科学院工程热物理研究所; |
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| 基金项目： | 国家自然科学基金(No.50806021); 中央高校基本科研业务费专项资金(No.10MG22) |
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| 摘 要： | 采用瞬态热带法在不同压力和不同温度下对气凝胶、硬硅钙石-气凝胶及陶瓷纤维-气凝胶复合绝热材料的导热系数进行了测量.结果表明,随着测试压力的降低,三种材料的导热系数都显著降低,在大约104 Pa时基本趋于常数;随着温度的升高,三种绝热材料的导热系数几乎与温度的立方成正比;当气凝胶的密度为145 kg/m3时,其导热系数具...
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| 关 键 词： | 热物性 导热系数 瞬态热带法 气凝胶 纳米孔绝热材料 |
Thermal Conductivity Measurement on Silica Aerogel and it's Composite Insulation Materials |
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| WEI Gao-Sheng LIU Yu-Song ZHANG Xin-Xin LIU Deng-Ying.Thermal Conductivity Measurement on Silica Aerogel and it's Composite Insulation Materials[J].Journal of Engineering Thermophysics,2011(4):667-670. |
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| Authors: | WEI Gao-Sheng LIU Yu-Song ZHANG Xin-Xin LIU Deng-Ying |
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| Institution: | WEI Gao-Sheng~1 LIU Yu-Song~2 ZHANG Xin-Xin~3 LIU Deng-Ying~4 (1.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education,North China Electric Power University,Beijing 102206,China,2.Energy Department of Beijing Sustainable Development Centre,Beijing 100083,3.School of Mechanical Engineering,University of Science and Technology Beijing,4.Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China) |
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| Abstract: | The transient hot-strip(THS) method was used to measure the thermal conductivity of silica aerogel,xonotlite-aerogel and ceramic fibre-aerogel composite insulation materials in different pressures and temperatures.The measurement results show that the thermal conductivity of all of the measured materials decreases significantly with the drop of pressure,and reaches to a constant at about 10~4 Pa.The thermal conductivity of all of the measured materials increases cubic with the rise of temperature.The therma... |
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| Keywords: | thermophysical properties thermal conductivity transient hot-strip method aerogel nano-porous insulation material |
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