聂少云,王冬磊,路中华

• 1:中国工程物理研究院化工材料研究所

摘要(Abstract)：

基于气凝胶的微观结构特点,建立了开孔蜂窝纳米空隙结构模型,分别针对方形和圆形截面推导出结构各部分热流,并由傅立叶定律得到其总的热流。结合固相导热,气相导热和辐射热传导,最终得到气凝胶总的等效导热率,并将计算结果与文献进行对比。结果表明,本文的结构模型与实验结果有较好的一致性。

关键词(KeyWords)： 气凝胶;等效导热率;蜂窝结构;隔热材料

Abstract:

Keywords:

基金项目(Foundation): 中物院基金(2012B0201019)

作者(Author): 聂少云,王冬磊,路中华

参考文献(References)：

• [1]Janusz Chwastowski,Jan Figiel,Andrzej Kotarba,et al.Aerogel Cherenkov detectors for the luminosity measurement at HERA[J].Nuclear Instruments and Methods in Physics Research Section A,2003,504(1-3):222-227.
• [2]Sobha Rani T,Subha M C S,Venkata Reddy G.Synthesis of water-glass-based silica aerogel powder via with and without squeezing of hydrogels[J].Joumal of Applied Polymer Science,2010,115(3):1675-1679.
• [3]Zeng S Q,Hunt A,Greif R.Geometric structure and thermal conductivity of porous medium silica aerogel[J].ASMEJ.Heat Transfer,1995,117(4):1055-1058.
• [4]陆规,王晓东,段远源.纳米孔隔热材料等效热导率的计算[J].宇航材料工艺,2011(1):1-6.LU Gui,WANG Xiao-dong,DUAN Yuan-yuan.Calculation method of effective thermal conductivity for nanoporous insulation material[J].Aerospace Materials and Technology,2011(1):1-6.
• [5]陆规,段远源,王晓东.微米尺度结构特征对纳米材料热导率的影响[J].宇航材料工艺,2011(1):29-33.LU Gui,DUAN Yuan-yuan,WANG Xiao-dong.Effect of functional additives and non-uniform structure on insulation performance of eanoporous insulation materials[J].Aerospace Materials and Technology,2011(1):29-33.
• [6]刘鹤,李增耀,胡子君等.气凝胶单元体模型结构参数与等效热导率研究[J].工程热物理学报,2012,33(6):1039-1042.LIU He,LI Zeng-yao,HU Zi-jun,et al.Relationship between structure and effective thermal conductivity of silica aerogel unit cell model[J].Journal of Engineering Thermophysics,2012,33(6):1039-1042.
• [7]施一长.纳米隔热材料导热机理与特性研究[D].哈尔滨:哈尔滨工业大学,2010.SHI Yi-chang.Mechanism and characteristics of heat conduction in nano-insulation material[D].Harbin,Harbin Institute of Technology,2010.
• [8]Song X Y,Cao W,Hunt A J.AEM Evaluation of Carbon Nanotubes in Silica Aerogels[C].Materials Research Society.San Francisco,1994.
• [9]吴兹潜,伍金芬.极值的求法及应用[M].科学普及出版社,1980.
• [10]Lu X,Caps R,Fricke J,et al.Correlation between structure and thermal conductivity of organic aerogels[J].Journal of Non-Crystalline Solids,1995,188(3):226-234.
• [11]Hrubesh L W,Pekala R W.Thermal properties of organic and inorganic aerogels[J].Journal of Materials Research,1994,9(3):731-738.
• [12]Zeng S Q,Hunt AJ,Greif R.Mean free path and apparent thermal conductivity of a gas in a porous medium[J].Journal of Heat Transfer,1995,117(3):758-761.
• [13]Gross J,Fricke J.Elastic nonlinearity of aerogels[J].Physical Review B,1992,45(22):12774-12777.

文章评论(Comment)：