Heat insulation properties of silica aerogel/glass fiber composites fabricated by press forming

被引:174
作者
Yuan, Bo [1 ]
Ding, Shuqiang [2 ]
Wang, Dongdong [1 ]
Wang, Gang [1 ]
Li, Hongxia [1 ]
机构
[1] Sinosteel Luoyang Inst Refractories Res Co Ltd, State Key Lab Adv Refractories, Luoyang 471039, Peoples R China
[2] St Gobain Zirpro Handan Co Ltd, Handan 056107, Peoples R China
基金
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
关键词
Composite materials; Porous materials; Thermal properties;
D O I
10.1016/j.matlet.2012.01.114
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Silica aerogel/glass fiber composites were fabricated by press forming of silica aerogel powders and dispersed glass fibers. Due to the nano porous structure, silica aerogel showed low gas thermal conductivity and solid thermal conductivity. By adding the glass fibers, the strength of the composites was improved but the heat insulation property was deteriorated. The thermal conductivities of the composites with 20 wt.% glass fibers at 300 degrees C and 600 degrees C were 0.025 W/(m K) and 0.030 W/(m K), respectively. As opacifier, the addition of TiO2 decreased the radiative thermal conductivity abruptly, especially at high temperatures. At 700 degrees C, it decreased from 0.041 W/(m K) to 0.030 W/(m K) after 20 wt.% TiO2 powders were added. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码:204 / 206
页数:3
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