Abstract
A computer-controlled method that minimizes thermometric and radiation errors for the measurement of thermal conductivity of materials is presented. Initial runs with G-11 to “qualify” the apparatus brought us face to face with our naiveté when large contact resistance errors were observed. Various methods that failed to maintain good thermal contact from room to liquid-helium temperature are examined, and the solution to the problem is discussed. Thermal conductivity curves for G-10/11CR (NIST), Amodel 33% glass, Noryl SEIGFN3, and 3 types of Ultem are presented. The thermal properties of Vectra, a liquid-crystal polymer, are also mentioned because its properties are unique.
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References
J. Waynert, Measurement of thermal conductivity of insulating cryogenic structural materials, in “Advances in Cryogenic Engineering—Materials,” vol. 32, Plenum Press, New York, p. 235 (1986).
M.B. Kasen, G.R. MacDonald, D.H. Beekman, Jr., and R.E. Schramm, Mechanical, electrical, and thermal characterization of G-10CR and G-11CR glass-cloth/epoxy laminates between room temperature and 4 K, in “Advances in Cryogenic Engineering,” vol. 26, Plenum Press, New York, p. 235 (1981).
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© 1994 Springer Science+Business Media New York
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Sondericker, J., DeVito, W., Zantopp, D. (1994). The Measurement of Thermal Conductivity of Plastics at Cryogenic Temperatures — A Discussion of Contact Resistance and One’s Naiveté. In: Reed, R.P., Fickett, F.R., Summers, L.T., Stieg, M. (eds) Advances in Cryogenic Engineering Materials . An International Cryogenic Materials Conference Publication, vol 40. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-9053-5_139
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DOI: https://doi.org/10.1007/978-1-4757-9053-5_139
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4757-9055-9
Online ISBN: 978-1-4757-9053-5
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