Aerogels pp 167-173 | Cite as

Mechanical and Acoustic Properties of Silica Aerogel

  • M. Gronauer
  • A. Kadur
  • J. Fricke
Part of the Springer Proceedings in Physics book series (SPPHY, volume 6)

Abstract

Aerogel is not only a fascinating superinsulating material [1] but also exhibits unusual acoustic and mechanical properties. This was found recently [2], when we measured the longitudinal sound velocity c in aerogel, c varied between about 100 and 300 m/s for aerogel densities between 70 to 300 g/l. [3]. To our knowledge these are the lowest sound velocities ever reported for inorganic solid materials. Accordingly aerogel — if compared to silica glass — has an extremely small Young’s modulus in the order of 106 to 107 N/m2 [3] and therefore can be compressed easily.

Keywords

Porosity Shrinkage Percolate 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1986

Authors and Affiliations

  • M. Gronauer
    • 1
  • A. Kadur
    • 1
  • J. Fricke
    • 1
  1. 1.Physikalisches Institut der UniversitätWürzburgGermany

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