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Improvement of Evacuated Aerogel Powder Insulation

  • W. H. Power
Conference paper
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 6)

Abstract

The reduction of radiant energy transfer through silica by the introduction of aluminum, copper, nickel, and silver powders has been demonstrated by Hunter, Kropschot, Schrodt, and Fulk [1], These authors have reported apparent thermal conductivities, k̅, as low as 2.0μw/cm-°K for mixtures of fume silica and aluminum powders. This value is about one-tenth of the thermal conductivity of Santocel® A silica aerogel between room and liquid nitrogen temperatures. Mixtures of Santocel A and copper powders with k̅’s as low as 3.4 μw/cm-ºK have been reported by Riede and Wang [2], Details such as particle sizes were not given. Black. Fowle. and Glaser [3] have described carbon-silica mixtures with k̅’s as low as 4.7 μw/cm-ºK. The direct determination of infrared transmittance has been demonstrated by Stoy [4] as a possible screening method for insulating powders and opacifying agents.

Keywords

Fume Silica Liquid Nitrogen Temperature Silica Aerogel Aluminum Powder Copper Powder 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    B. J. Hunter, R. H. Kropschot, J. E. Schrodt, and M. M. Fulk, “Metal Powder Addltives in Evacuated- Powder Insulation,” Advances in Cryogenic Engineering, Vol. 5, K.D. Timmerhaus (ed.) Plenum Press, Inc., New York (1960),Google Scholar
  2. 2.
    P.M. Riede and D.I-J. Wang, “Characteristics and Applications of Some Superinsulations,” Advances in Cryogenic Engineering, Vol. 5, K.D. Timmerhaus (ed.), Plenum Press, Inc., New York (1960).Google Scholar
  3. 3.
    I. A. Black, A.A. Fowls, and P.E. Glaser, “Development of High-Efficiency Insulation,” Advances in Cryogenic Engineering, Vol. 5, K. D. Timmerhaus (ed.), Plenum Press, Inc., New York (1960).Google Scholar
  4. 4.
    S.T. Stoy, “Cryogenic Insulation Development,” Advances in Cryogenic Engineering, Vol. 5, K.D. Timmerhaus (ed.), Plenum Press, Inc., New York (1960).Google Scholar

Copyright information

© Springer Science+Business Media New York 1961

Authors and Affiliations

  • W. H. Power
    • 1
  1. 1.Monsanto Chemical CompanySt. LouisUSA

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