Aerogel-based thermal insulation
Aerogel-based thermal insulation
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DOI：
10.1016/s0022-3093(98)00125-2
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发表时间：
1998-04
影响因子：
3.5
通讯作者：
Douglas M. Smith;A. Maskara;Ulrich R. Boes
中科院分区：
文献类型：
--
作者：
Douglas M. Smith;A. Maskara;Ulrich R. Boes
讨论了用于高级隔热的气凝胶颗粒的商业开发，该气凝胶颗粒通过环境压力处理生产。采用建模与实验验证相结合的方法，对颗粒压坯的热性能进行了研究。应用一种新的方法对炭黑进行表面改性，以解决向二氧化硅气凝胶中添加遮光剂的问题，并获得了改善的热性能和机械性能。当以正确的密度/强度生产乳浊颗粒时，施加1巴载荷（如在真空板中自然施加的）导致变形/重排，使得实现接近1的填充分数。在环境压力和真空下，这些颗粒压块的热性能与气凝胶整料的热性能相似，而没有整料的成本和加工问题。
Commercial development of aerogel granules, produced via ambient pressure processing, for advanced thermal insulation is discussed. By employing modeling and experimental verification, the thermal performance of granule compacts was studied. The application of a novel approach for surface modifying carbon black to the problem of adding opacifiers to silica aerogels is shown and improved thermal and mechanical properties were obtained. When opacified granules are produced with the correct density/strength, the application of a 1 bar load (as is naturally applied in vacuum panels) results in deformation/rearrangement such that a packing fraction approaching one is achieved. The thermal performance of these granule compacts, at ambient pressure and vacuum, is similar to that of aerogel monoliths without the cost and processing problems of monoliths.