| 轻质高效保温材料掺杂硅气凝胶 |
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| 引用本文： | 王珏,周斌.轻质高效保温材料掺杂硅气凝胶[J].功能材料,1996,27(2):167-170. |
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| 作者姓名： | 王珏 周斌 |
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| 作者单位： | 同济大学波耳固体物理研究所，中国工程物理研究院电子工程研究所 |
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| 基金项目： | 国家自然科学基金,中物院科学基金 |
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| 摘 要： | 利用正硅酸甲脂（ＴＭＯＳ）为原料的溶胶－凝胶过程，摸索了不同反应条件下形成凝胶的规律，并选用ＴｉＯ２粉末及玻璃纤维作为掺杂剂，采用超临界干燥处理制备出掺ＴｉＯ２的硅气凝胶，通过对红外光谱以及不同温度和气压条件下热导率的测量，讨论了不同成份配比以及相应的热传输过程对材料热导率的影响。结果表明，密度为２６０ｋｇ／ｍ＾３的掺杂硅气凝胶在８００Ｋ时的热导率为０．０３８ｗ／ｍ．ｋ，是一种新型的轻质高效保温材
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| 关 键 词： | 硅气凝胶 掺杂 热导率 保温材料 |
Low Density and High Effective Silica Aerogel Doped with TiO 2 Powder and Ceramic Fibers |
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| Wang Jue,Zhou Bin,Shen Jun,Meng Fanming,Chen Maobin.Low Density and High Effective Silica Aerogel Doped with TiO 2 Powder and Ceramic Fibers[J].Journal of Functional Materials,1996,27(2):167-170. |
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| Authors: | Wang Jue Zhou Bin Shen Jun Meng Fanming Chen Maobin |
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| Abstract: | The thermal conductivity of silica aerogels doped with TiO 2 powder and ceramic fibers was investigated by varying the gas pressure and the temperature. Results show that the doped SiO 2 aerogel with a density of 260Kg/m 3 has the total thermal conductivity of 0.038W/m.k at 800K in air. The development of such low thermal conductivity materials is of great interest with respect to thermal insulation at high mperatures. |
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| Keywords: | silica aerogel doped thermal conductivity |
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