Development of transparent silica aerogel over a wide range of densities
Development of transparent silica aerogel over a wide range of densities
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DOI：
10.1016/j.nima.2010.02.241
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发表时间：
2010-11-01
影响因子：
1.4
通讯作者：
Yokogawa, Hiroshi
中科院分区：
文献类型：
--
作者：
Tabata, Makoto;Adachi, Ichiro;Yokogawa, Hiroshi
我们已经成功地开发出了密度（即折射率）范围很广的疏水二氧化硅气凝胶。我们发明了一种针孔干燥方法，使得生产折射率在1.06 - 1.26这个全新范围的高度透明气凝胶成为可能。所获得的气凝胶比传统气凝胶更透明，并且在针孔干燥过程中折射率能得到很好的控制。为了评估针孔干燥气凝胶作为切伦科夫辐射体的性能，我们进行了测试束实验。通过环形成像切伦科夫计数器成功地观察到了清晰的切伦科夫环。我们还首次开发出了密度为0.01克/立方厘米（低折射率为1.0026）的整体式疏水气凝胶，用作太空尘埃收集器。因此，可以自由生产折射率在1.0026和1.26之间的任何气凝胶。（C）2010爱思唯尔有限公司。版权所有。
We have succeeded in developing hydrophobic silica aerogels over a wide range of densities (i.e. refractive indices). A pinhole drying method was invented to make possible producing highly transparent aerogels with entirely new region of refractive indices of 1.06-1.26. Obtained aerogels are more transparent than conventional ones, and the refractive index is well controlled in the pinhole drying process. A test beam experiment was carried out in order to evaluate the performance of the pinhole-dried aerogels as a Cherenkov radiator. A clear Cherenkov ring was successfully observed by a ring imaging Cherenkov counter. We also developed monolithic and hydrophobic aerogels with a density of 0.01 g/cm(3) (a low refractive index of 1.0026) as a space dust capturer for the first time. Consequently, aerogels with any refractive indices between 1.0026 and 1.26 can be produced freely. (C) 2010 Elsevier B.V. All rights reserved.