Abstract
Among their other exceptional properties, aerogels also exhibit unusual dielectric properties due to their nano-sized structures and high porosities. For example, our measurements of the dielectric constants and loss tangents for several aerogel varieties at microwave frequencies show that they both vary linearly with the aerogel density, indicating that the dielectric behavior of aerogels is more gas-like than solid-like. We have also measured the dielectric strength of silica aerogels and find that they are better than ceramics for high voltage insulation. The low dielectric constants and loss tangents of aerogels, along with their controllable thermal expansion properties, make them desirable materials for use as thin films in high speed integrated digital and microwave circuitry.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
Similar content being viewed by others
References
R.P. Her, “The Chemistry of Silica,” J. Wiley and Sons, New York (1979).
J. Fricke, Aerogels, Sci. Am. 92:256 (1988).
J. Fricke and A. Emmerling, Aerogels - Preparation, Properties, Applications, Chemistry, Spectroscopy, and Applications of Sol-Gel Glasses 77:37 (1991).
A. da Silva, P. Donoso, and M.A. Aegerter, Properties of Water Adsorbed in Porous Silica Aerogels, J. Non-Cryst. Solids 145:168 (1992)
L.W. Hrubesh, L.E. Keene, and V.R. Latorre, Dielectric properties of Aerogels,“ J. Mater. Res. 8:101 (1993).
A. da Silva, D. I. dos Santos, and M.A. Aegerter, Dielectric Response of Silica Aerogels, J. Non-Cryst. Solids 96:1159 (1987).
A.R. von Hippel, “Dielectric and Waves,” J. Wiley and Sons, New York (1954).
D.W. Van Krevelen, “Properties of Polymers,” Elsevier, New York (1990).
R.A. Flinn and P.K. Trojan, “Engineering Materials and Their Applications,” Houghton Mifflin Co., Boston (1981).
D.R. Ulrich, Chemical Processing of Ceramics, Chem. & Eng. News (1990).
T.M. Tillotson, L.W. Hrubesh, and I.M. Thomas, Partially Hydrolysed Alkoxysilanes as Precursors for Silica Aerogels, Better Ceramics through Chemistry III, 121:685 (1988).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1994 Springer Science+Business Media New York
About this chapter
Cite this chapter
Hrubesh, L.W., Pekala, R.W. (1994). Dielectric Properties and Electronic Applications of Aerogels. In: Attia, Y.A. (eds) Sol-Gel Processing and Applications. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2570-7_31
Download citation
DOI: https://doi.org/10.1007/978-1-4615-2570-7_31
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-6098-8
Online ISBN: 978-1-4615-2570-7
eBook Packages: Springer Book Archive