Effective Thermal Conductivity Analysis of Xonotlite-aerogel Composite Insulation Material  

作　　者：Gaosheng WEI Xinxin ZHANG Fan YU 

机构地区：[1]School of Energy and Power Engineering, Key Laboratory of Condition Monitoring and Control for Power PlantEquipment of Ministry of Education, North China Electric Power University, Beijing 102206, China [2]School of Mechanical Engineering, University of Science & Technology Beijing, Beijing 100083, China

出　　处：《Journal of Thermal Science》2009年第2期142-149,共8页热科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.50806021);Program for Changjiang Scholars and Inn ovative Researeh Team in University (PCSIRT0720).

摘　　要：A 3-dimensional unit cell model is developed for analyzing effective thermal conductivity of xonotlite-aerogelcomposite insulation material based on its microstructure features. Effective thermal conductivity comparisonsbetween xonotlite-type calcium silicate and aerogel as well as xonotlite-aerogel composite insulation material arepresented. It is shown that the density of xonotlite-type calcium silicate is the key factor affecting the effectivethermal conductivity of xonotlite-aerogel composite insulation material, and the density of aerogel has little influence.The effective thermal conductivity can be lowered greatly by composite of the two materials at an elevatedtemperature.

关 键 词：aerogei effective thermal conductivity nano-porous insulator xonotlite-type calcium silicate. 

分 类 号：TB33[一般工业技术—材料科学与工程]