Acoustic properties of silica aerogels between 400 mK and 400 K

Daughton DR.; MacDonald J.; Mulders N.

首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Acoustic properties of silica aerogels between 400 mK and 400 K

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Acoustic properties of silica aerogels between 400 mK and 400 K

机译：介于400 mK和400 K之间的二氧化硅气凝胶的声学特性

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Using acoustic resonant spectroscopy, we have, studied the low frequency elastic properties of silica aerogels with densities of 0.045-0.267 g/cm(3) over a temperature range of 400 mK to 400 K. We observe a large drop in the elastic moduli between 20 and 100 K accompanied by a damping peak and attribute this to a thermally activated relaxation process. At higher temperatures the elastic moduli increase linearly with temperature, a phenomenon normally associated with elastomers like rubber and indicative of a significant entropic contribution to the stiffness of the aerogels. (C) 2003 Elsevier Science B.V. All rights reserved. [References: 18]

机译：使用声共振光谱，我们研究了在400 mK至400 K的温度范围内密度为0.045-0.267 g / cm（3）的二氧化硅气凝胶的低频弹性。我们观察到之间的弹性模量大幅度下降20 K和100 K伴随有阻尼峰值，这归因于热激活的松弛过程。在较高的温度下，弹性模量随温度线性增加，这种现象通常与橡胶等弹性体有关，表明熵对气凝胶的硬度有重要贡献。（C）2003 Elsevier Science B.V.保留所有权利。 [参考：18]

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《Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites》 |2003年第3期|共7页
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Daughton DR.; MacDonald J.; Mulders N.;
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正文语种 eng
中图分类晶体学;
关键词
Sio2 aerogels;

机译：Sio2气凝胶;

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1. Acoustic properties of silica aerogels between 400 mK and 400 K [J] . Daughton DR., MacDonald J., Mulders N. Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites . 2003,第3期

机译：介于400 mK和400 K之间的二氧化硅气凝胶的声学特性
2. Acoustic properties of silica aerogels between 400 mK and 400 K [J] . Daughton DR., MacDonald J., Mulders N. Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites . 2003,第3期

机译：介于400 mK和400 K之间的二氧化硅气凝胶的声学特性
3. Acoustic properties of silica aerogels from 400 mK to 400 K [J] . Daughton DR., MacDonald J., Mulders N. Physica, B. Condensed Matter . 2003,第Pta2期

机译：400 mK至400 K的二氧化硅气凝胶的声学特性
4. Analyzing the Theoretical Limits of Forced Air-Cooling by Employing Advanced Composite Materials with Thermal Conductivities > 400W/mK [C] . Uwe DROFENIK, Johann W. KOLAR International Conference on Integrated Power System . 2006

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5. Filtered laser cooling of an optomechanical system anchored to a 400 mK bath. [D] . Jayich, Andrew M. 2012

机译：锚定在400 mK浴池上的光机械系统的过滤激光冷却。
6. Pharmacokinetic Properties of Ibuprofen (IBU) From the Fixed‐Dose Combination IBU/Caffeine (400/100 mg; FDC) in Comparison With 400 mg IBU as Acid or Lysinate Under Fasted and Fed Conditions—Data From 2 Single‐Center Single‐Dose Randomized Crossover Studies in Healthy Volunteers [O] . Thomas Weiser, Cornelia Schepers, Tobias Mück, -1

机译：在禁食和进食条件下固定剂量联合IBU /咖啡因（400/100 mg; FDC）与400 mg IBU作为酸或赖氨酸相比布洛芬（IBU）的药代动力学特性-来自2个单中心单剂量的数据健康志愿者的随机交叉研究
7. The acoustical properties of tetraethyl orthosilicate based granular silica aerogels [O] . H. Begum, K. V. Horoshenkov, M. Conte, 2021

机译：基于四乙基颗粒硅酸盐的粒状硅氧烷气凝胶的声学性质
8. Surface preparation and characterization of a 400 (mu)m diameter fused silica optical fiber for direct optical initiation (DOI) applications [R] . Klingsporn, P E 1992

机译：用于直接光学引发（DOI）应用的400μm直径熔融石英光纤的表面制备和表征

Acoustic properties of silica aerogels between 400 mK and 400 K

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