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《Materials Research and Application》 2010-04
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Study on nano-porous SiO_2 insulation material

KANG Xu1,ZHAO Lei2,DUAN Xian-jian1,LI Zhen-hua1,LI Yuan-bing2,LI Shu-jing2 (1.Guangzhou GBS High-tech & Industry Co. Ltd.,Guangzhou 510450,China;2.The Key State Laboratory Breeding Base of Refractories and Ceramics,Wuhan University of Science and Technology,Wuhan 430081,China)  
Nanoporous SiO2 insulation material has been paid more and more attention due to its excellent physical properties,such as low density,low thermal conductivity and heat resistance at high temperature. In this paper,nanoporous SiO2 insulation material was prepared by using fumed silica,glass fiber and TiO2 nanoparticles as raw materials. And the influence of specific surface area of fumed silica,the length of glass fiber and the diameter and loading of TiO2 nanoparticles to its properties were investigated. The results indicated that the optimal properties of the nano-porous SiO2 insulation material can be prepared by adjustment of those three main factors and its thermal conductivity were 0.037 W/m·K,0.056 W/m·K and 0.067 W/m·K at 200 ℃,500 ℃ and 900 ℃ respectively.
【CateGory Index】: TB383.1
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